{"title":"EJ25 Short Blocks","description":"\u003cp\u003eIAG Performance carries EJ25 short blocks for Subaru WRX, STI, Legacy GT, and Forester XT applications, including our IAG 550 through 1150 horsepower closed-deck short blocks and genuine Subaru FHI and Type RA short block engines. Whatever your power goal, we have an EJ25 short block built to match.\u003c\/p\u003e","products":[{"product_id":"subaru-fhi-2-5l-turbo-short-block-engine-for-2004-21-sti-06-14-wrx-05-09-lgt-04-13-fxt","title":"Subaru 2.5L Turbo Short Block Engine For 2004-21 STI, 06-14 WRX, 05-09 LGT, 04-13 FXT","description":"\u003cp\u003eThe Subaru OEM 2.5L 2004-2021 STI Short Block comes assembled from the manufacturer with new pistons, rods, bearings and crankshaft. The engine can be used as a replacement short block for 2.5L turbo WRX, Forester XT and Legacy GT models as well as an upgrade for 2.0L EJ20 turbo 2002-05 WRX's. *Note 2002-05 Subaru WRX models require additional parts and tuning when upgrading to the EJ25 2.5L short block.\u003c\/p\u003e","brand":"Subaru","offers":[{"title":"Default Title","offer_id":48062337056986,"sku":"10103AC870","price":2883.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/api0xtxve__58845.1692733761.1280.1280.jpg?v=1781529735"},{"product_id":"subaru-type-ra-2-5l-turbo-short-block-engine-for-2018-sti-ra","title":"Subaru Type RA 2.5L Turbo Short Block Engine For 2018 + STI RA","description":"\u003cp\u003eThe Subaru OEM 2.5L 2018+ Type RA STI Short Block comes assembled from Subaru with new pistons, rods, bearings and crankshaft. The engine can be used as a replacement short block for the 2.5L turbo WRX, Forester XT and 2005-09 Legacy GT models as well as an upgrade for 2.0L EJ20 turbo 2002-05 WRX's. *Note 2002-05 Subaru WRX models require additional parts and tuning when upgrading to the EJ25 2.5L short block.\u003c\/p\u003e","brand":"Subaru","offers":[{"title":"Default Title","offer_id":48062338171098,"sku":"10103AD020","price":2703.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/10103AD020-01__11995.1703713375.1280.1280.jpg?v=1781529738"},{"product_id":"subaru-type-ra-ej25-short-block-build-bundle-for-04-21-sti-06-14-wrx-04-13-fxt-05-09-lgt","title":"Subaru Type RA EJ25 Short Block Build Bundle For 04-21 STI, 06-14 WRX, 04-13 FXT, 05-09 LGT","description":"\u003cp\u003eThe 2018 Subaru Type RA Short Block is known as one of the best STI short blocks from the factory. Did you know the 2019-21 STI received the Type RA Short Block? Many enthusiasts seek this short block as a cost-effective OEM plus style upgrade due to its strengthened piston design over earlier EJ25 STI offerings.\u003c\/p\u003e\n\u003cp\u003eWe put together a build package that many enthusiasts can utilize when replacing their original EJ25 short block with a Type RA. We start with a brand new Type RA short block directly from Subaru. Then we add an OEM engine gasket set featuring every gasket, o-ring, and seal required for installation. It’s so comprehensive you will have some items left over. Finally, we include a complete ARP 11mm head stud set, perfect for stock or OEM plus builds that will see performance modifications and additional boost.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eIncludes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSubaru OEM Type RA Short Block\u003c\/li\u003e\n\u003cli\u003eSubaru OEM Engine Gasket Set - Application Specific\u003c\/li\u003e\n\u003cli\u003eARP 11mm Head Studs - PN# 260-4701\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Subaru","offers":[{"title":"08-21 STI - PN# IAG-KIT-0001","offer_id":48059228291290,"sku":"IAG-KIT-0001","price":3124.99,"currency_code":"USD","in_stock":true},{"title":"07 STI -  PN# IAG-KIT-0002","offer_id":48059228324058,"sku":"IAG-KIT-0002","price":3124.99,"currency_code":"USD","in_stock":true},{"title":"04-06 STI - PN# IAG-KIT-0003","offer_id":48059228356826,"sku":"IAG-KIT-0003","price":3124.99,"currency_code":"USD","in_stock":true},{"title":"08-14 WRX, 09-13 FXT - PN# IAG-KIT-0004","offer_id":48059228389594,"sku":"IAG-KIT-0004","price":3124.99,"currency_code":"USD","in_stock":true},{"title":"06-07 WRX, 06-08 FXT, 07-08 LGT, 07-08 OBXT - PN# IAG-KIT-0005","offer_id":48059228422362,"sku":"IAG-KIT-0005","price":3124.99,"currency_code":"USD","in_stock":true},{"title":"05-06 LGT, 05-06 OBXT - PN# IAG-KIT-0006","offer_id":48059228455130,"sku":"IAG-KIT-0006","price":3124.99,"currency_code":"USD","in_stock":true},{"title":"04-05 FXT, 04-06 Baja - PN# IAG-KIT-0007","offer_id":48059228487898,"sku":"IAG-KIT-0007","price":3124.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/IAG-KIT-0001-01__64143.1703780013.1280.1280.jpg?v=1781530532"},{"product_id":"iag-950-ej25-subaru-closed-deck-short-block-for-wrx-sti-lgt-fxt-950-bhp","title":"IAG 950 EJ25 Subaru Closed Deck Short Block For WRX, STI, LGT, FXT - 950 BHP","description":"\u003ch2 style=\"text-align:center;\"\u003eIAG 950 EJ25 2.5L SUBARU SHORT BLOCK\u003c\/h2\u003e\n\u003chr style=\"border:none;border-top:1px solid #e0e0e0;margin:24px 0;\"\u003e\n\u003cdiv class=\"video-embed\" style=\"position:relative;width:100%;padding-bottom:56.25%;height:0;overflow:hidden;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/V1nwJV1USwU?start=0\u0026amp;end=0\u0026amp;autoplay=1\u0026amp;loop=1\u0026amp;mute=1\u0026amp;playlist=V1nwJV1USwU\u0026amp;version=3\u0026amp;rel=0\" allowfullscreen loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003chr style=\"border:none;border-top:1px solid #e0e0e0;margin:24px 0;\"\u003e\n\u003cimg alt=\"Stage 2 Short Block H-Beam Connecting Rods\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/f5a35104-74c9-4c1a-a0dc-f23f3e5534fb\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eRACE ON SUNDAY, WORK ON MONDAY\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe IAG 950 Short Block is the ultimate \"weekend racer\" block. Built to withstand up to 950 BHP, this is our strongest \"Street\" short block offering. The IAG 950 short block features +2mm IAG Spec H-Beam forged connecting rods, IAG-Spec JE Pistons with electroless nickel plated coating with H13 tool steel wrist pins, and our venerable \"Fire-Lock\" head gasket system for 14mm head studs. Each IAG 950 short block is hand assembled using ACL or King rod and main bearings. This combination of parts makes the IAG 950 the perfect block for drag or road racing.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"EJ25 STI Crankshaft\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/4134626c-1677-4b40-ac18-6a8639811c32\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eBUILT WITH 100% NEW COMPONENTS\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe IAG 950 Short Block starts with brand new Subaru 2.5L engine case halves. Our machinists machine the assembled case halves in our Haas VF-4SS CNC mill to accept the IAG Closed Deck inserts, transforming the block into a solid deck. Next, a deck pair of deck plates are attached and the short block is bored and honed to 99.75mm in our in-house Sunnen SV-30 computer controlled cylinder hone. IAG's in-house honing process allows us to set custom piston to wall clearances to ensure quiet operation and reduced oil consumption. The Haas mill also cuts a groove at the top of each cylinder to accept the Fire-Lock head gasket rings and drills each head bolt hole for 14mm head studs. The modified case halves are then assembled using a new 2017+ Subaru 2.5L nitride treated STI crankshaft and IAG-Spec Tuff H-Beam connecting rods with ARP rod bolts. IAG Short blocks feature ACL or King Race rod and main bearings and are all balanced and blueprinted. Finally, the case halves are sealed with new OEM main\/case bolts and sealant.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"IAG Fire-Lock Head Gasket System\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/2aab2d7f-ae8c-4751-a4ac-a029914ba7c6\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eNEVER WORRY ABOUT HEAD GASKET FAILURES\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe IAG 950 EJ25 Closed Deck Short Block features our proprietary \"Fire-Lock\" Head gasket system. This system has been proven in our record setting race cars to be the strongest Subaru head gasket system ever produced. To achieve these results our engineers separated the combustion chamber sealing from the fluid sealing aspects of the head gaskets. Our machinists carefully machine a lip at the top of each cylinder to accept the \"Fire-Lock\" ring. With the ring locked in place, it stands proud above the deck, providing a superior seal. The separate gasket bodies take care of sealing oil and coolant passages and keeping them out of the combustion chamber. 14mm Head studs (Not Included) hold the assembly together.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"IAG 950 Closed Deck Block\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/9ad69b38-e040-4d87-918f-a196ee8e5ed4\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eCLOSED DECK FOR EXTRA STRENGTH\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eOur unique closed deck system significantly increases the strength of the OEM case halves. This process supports the cylinder walls at the top of the case in order to prevent flexing and possible cracking where the case bolt reliefs are cut into the back of the cylinder wall.\u003cbr\u003eDuring the installation process we machine the assembled case halves in our Haas VF-4SS CNC mill to accept the IAG Closed Deck inserts. Once the case has been machined we heat it in an oven while freezing the specially machined inserts with liquid nitrogen. The inserts are then pressed into place and then machined to a mirror finish.\u003cbr\u003eThe unique inserts feature small passages that allow needed coolant flow to the deck surface. This means that the closed deck system does not affect the block's cooling ability and will not cause overheating, even in daily drivers.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"IAG 950 IAG-SPec JE Pistons and Rings\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/f3e145ac-96d8-42e0-8a6b-16dfe5e62914\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003ePISTONS SPECIALLY DESIGNED WITH POWER IN MIND\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe pistons used in the IAG 950 Short Blocks are specifically designed to support the rigors of racing. Designed in partnership with JE, these IAG-Spec pistons feature electroless nickel plating and a 2618 Alloy. Extra thick ring lands resist collapsing under pressure. The upgraded .250\" wall H13 tool steel offset wrist pins are designed to hold up to 950 BHP without bending or breaking. The pistons also feature JE's Perfect Skirt coating.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eNEED HELP CHOOSING A BLOCK?\u003c\/h2\u003e\n\u003cdiv class=\"video-embed\" style=\"position:relative;width:100%;padding-bottom:56.25%;height:0;overflow:hidden;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/AMytJ0EHOZo?start=0\u0026amp;end=0\u0026amp;autoplay=0\u0026amp;loop=0\u0026amp;rel=1\" allowfullscreen loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eWe made this video to highlight the differences between each of our short blocks and to help you choose the best one for your performance goals and budget. Our Build Advisors and Customer Support staff can also assist you with any questions or concerns. Just click the button below for assistance.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"CEI\" loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/Unknown-378.png\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eQUALITY GUARANTEED\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eWe stand behind every hand-built engine we produce. IAG's Standard Short Block Workmanship Warranty covers your short block for 12 months or 12,000 miles. We have also teamed up with a selection of IAG Certified Installation Facilities which offer up to a 24 month\/24,000 mile workmanship warranty when the engine is purchased, installed, and tuned by that IAG Certified Installer.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003ePOWER RATING\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003ePower:The IAG 950 Short Block has a power output rating of 950 BHP\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eHARDWARE \/ SEAL OPTION\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eNot planning on reusing your original short block service plugs and covers? IAG offers a simple comprehensive cover and seal kit that includes (1) Rear main seal, (3) OEM wrist pin plugs, (3) OEM wrist pin plug washers, (1) OEM separator cover, (6) OEM separator cover bolts, (1) OEM wrist pin service cover, (1) OEM wrist pin service cover O-ring and (2) OEM wrist pin service cover screws. *If you are reusing your original wrist pin service plugs and covers always replace the (3) OEM wrist pin plug washers and (1) wrist pin service cover O-ring before installing a short block to avoid potential leaks. *Never reuse a rear main seal on a new short block.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eHEAD GASKET OPTION\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\n\u003cp\u003eAfter years of research and development testing, the IAG Performance Fire-Lock head gasket is the newest solution to preventing head gasket failure on high horsepower and high boost Subaru EJ25 engines. This solution is loosely derived from diesel technology where a counterbore step is machined around each cylinder bore allowing specially sized fire rings to drop into the machined area and head gasket bores. The shims are designed to create a compression seal once the heads are installed and torqued into place. IAG fire rings are manufactured to a very strict tolerance from a proprietary alloy and are then put through a heat treatment process. The gaskets are manufactured from an asbestos-free composite raw material and feature a silicone based beading applied to critical areas to improve sealing around all water and oil passages. The combination of the alloy compression shims and gaskets assure maximum sealing for a Subaru EJ25 turbocharged engine.*The IAG Fire-Lock gaskets require machine work for installation and are recommended for use with 14mm head stud hardware.*The gaskets are sold in pairs with four Fire-Lock rings.Features:\u003c\/p\u003e\n\u003cp\u003e1. If a block or cylinder head was previously o-ringed the groove must be filled and resurfaced before using this type of gasket.2. These gaskets require IAG ARP 14mm head studs to achieve the required torque necessary for proper installation.3. Due to the required torque, any block that was previously honed will need to go to the next size overbore.4. Future servicing will require cylinder head resurfacing due to an imprint left from the Fire-Lock rings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eOIL PICKUP \/ OIL BAFFLE \/ WINDAGE TRAY OPTIONS\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe IAG Performance Subaru WRX \/ STI oil pickup was designed by Tigwerks to replace the OEM EJ25 oil pickup, which is prone to failure. It's a well-known fact that the OEM oil pickups often crack and fail which, in most cases, destroys your engine from lack of oil pressure. To avoid the cracking failures seen in the OEM oil pickup tubes, the Tigwerks oil pickup is manufactured from heavy-gauge steel tubing that is 3x thicker than OEM. Additionally, it features a flange machined from 3\/8\"  1018 CR steel to mate with the block, sealed with a Viton O-ring. The integrated heavy-duty mounting bracket uses two mounting points rather than the OEM single mounting point. Furthermore, the oil pickup features a formed bottom with an OEM style mesh screen for proper filtration. The TIG-welded oil pickup's increased material thickness, matched with the two-point heavy-duty mounting bracket, helps ensure that it does not fatigue and fail over time like an OEM unit.The IAG Oil Control Baffle and Windage Tray System is designed to limit potential blow-by and prevent oil starvation in your Subaru's WRX \/ STI EJ engine during high rpm and high g-force driving. Through the use of Viton one-way flapper valves on our baffle and louvers in our windage tray, oil is prevented from reentering the upper crankcase area and is directed down into the oil pan to ensure plentiful supply to the oil pickup. IAG's integrated two-piece Oil Control Baffle and Windage Tray System is designed to work with our own oil pickup, as well as other oil pickups*. The baffle fits neatly in the engine crankcase area, allowing normal installation of the OEM oil pan and popular aftermarket pans*.Oil Pickup \u0026amp; Baffle Install Notes\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eOIL PUMP OPTION\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\n\u003cp\u003eThe 11mm Subaru Oil pump is one of the most popular off the shelf pumps to use on EJ25 engines. Originally equipped on the 2008-21 STI Dual AVCS engines, it provides an adequate amount of pressure and flow that fits the needs of many OE and built engines. But, as with almost anything, there is room for improvement.\u003c\/p\u003e\n\u003cp\u003eIncreasing oil flow volume and pressure in an EJ25 ensures that the bearings have sufficient oil film under all power levels and driving conditions. Additional oil flow to the engine provides a greater oil reserve to operate the AVCS solenoids and cam gears - giving you more consistent performance results.\u003c\/p\u003e\n\u003cp\u003eThe IAG Stage 2 CNC Ported 11mm oil pump was developed over years of servicing street and racing engines. In that time IAG has tested and utilized the majority of the popular Subaru oil pumps available on the market (JDM, Cosworth, ACL etc.) for customer, personal and racing vehicles.\u003c\/p\u003e\n\u003cp\u003eOver the last few years if you wanted an upgraded oil pump over the stock 11mm you would either buy a hand ported model from a trusted source, or often an OEM JDM (Japanese Market) 12mm pump. We believe that we have developed a better alternative. The IAG Stage 2 CNC Ported 11mm oil pumps have shown through lab testing on a Spintron Machine that it will outperform a JDM 12mm.\u003c\/p\u003e\n\u003cp\u003eThe Stage 2 Oil pump is a cost effective solution that outperforms the market standards. This pump has been extensively tested on street cars, track cars, and on our in-house Spintron to ensure consistent and repeatable performance.\u003c\/p\u003e\n\u003cp\u003eEach IAG Stage 2 oil pump starts life as an OEM spec 11mm oil pump, straight from Subaru. IAG completely disassembles the new oil pump including pulling the rotors, backing plate \u0026amp; pressure relief valve. Next, the main body is fixtured in our in-house 5-Axis Centroid CNC machine where the inlet and outlet passageways are CNC ported. This allows for a larger, more consistent pathway for the oil into and out of the gerotor internals and helps to prevent cavitation. The Oil Pump Outlet where it meets the engine block is also CNC “Port Matched”, for a perfect transition into the engine block. The Inlet and Outlet sides of the gerotor are also opened up on the CNC mill to reduce inlet side cavitation, and to reduce outlet side pressure drops.\u003c\/p\u003e\n\u003cp\u003eThe pressure relief valve piston is REM Polished, which provides a non-directional, low Ra, polished finish. This reduces friction, heat and possibility of the relief valve piston galling and sticking, a common failure point on the OEM pumps.\u003c\/p\u003e\n\u003cp\u003eThe piston is reinstalled and confirmed to operate correctly. The rotors are measured and checked to be within the manufacturer's specification - aka Blueprinted, and installed next. The pump is then put together with a light coating of assembly lube to reduce friction and scuffing and aid in priming on first start up.\u003c\/p\u003e\n\u003cp\u003eFinally, the backing plate is installed. Loctite is added to the hardware, and each piece receives a painted mark after it is correctly torqued. The pump ships ready to install, with all hardware and seals required for installation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"IAG Performance","offers":[{"title":"Default Title","offer_id":48066713256154,"sku":"IAG-ENG-S950","price":6499.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apiyke6d7__63217.1633558543.1280.1280__76099.1698680426.1280.1280.jpg?v=1781533637"},{"product_id":"iag-performance-crest-cnc-stage-x-2-5l-subaru-billet-aluminum-short-block-for-wrx-sti-lgt-fxt","title":"IAG Performance - Crest CNC Stage X 2.5L Subaru Billet Aluminum Short Block For WRX, STI, LGT, FXT","description":"\u003ch2 style=\"text-align:center;\"\u003eIAG PERFORMANCE \/ CREST CNC 2.5L SUBARU BILLET ALUMINUM SHORT BLOCK 1150+ BHP\u003c\/h2\u003e\n\u003chr style=\"border:none;border-top:1px solid #e0e0e0;margin:24px 0;\"\u003e\n\u003cdiv class=\"video-embed\" style=\"position:relative;width:100%;padding-bottom:56.25%;height:0;overflow:hidden;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/AMytJ0EHOZo?start=0\u0026amp;end=0\u0026amp;autoplay=1\u0026amp;loop=1\u0026amp;mute=1\u0026amp;playlist=AMytJ0EHOZo\u0026amp;version=3\u0026amp;rel=0\" allowfullscreen loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003chr style=\"border:none;border-top:1px solid #e0e0e0;margin:24px 0;\"\u003e\n\u003cimg alt=\"IAG PERFORMANCE \/ CREST CNC STAGE X SUBARU EJ SHORT BLOCK\" loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/Unknown-353.jpg\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eTHE IAG PERFORMANCE \/ CREST CNC STAGE X SHORT BLOCK\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe IAG Performance \/ Crest CNC 2.5L Subaru Billet Aluminum Short Block aspires to revolutionize the Subaru performance tuning market by reinventing the EJ and addressing virtually every weakness that exists in max-power builds. The Stage X Billet Short Block is engineered to eliminate case flex in high-power EJ builds, making it possible to reliably run at a power output rating of 1150+BHP. This short block is equipped with radiused coolant and oil galleries to improve flow, a 4-bolt bottom end for added strength, and replaceable iron sleeves, making rebuilds easier. If you are looking for an EJ engine that can deliver high horsepower without any compromises, then the Crest CNC\/IAG Stage X billet short block is the perfect choice!\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"Crest Billet Aluminum Subaru Engine Case\" loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/Unknown-354.jpg\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eSOLID FOUNDATION BY CREST, POWERED BY IAG\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe Stage X Billet Short Block is a complete short block built by IAG on the Crest billet platform. Crest CNC (formerly Willall), is renowned for their precision-machined billet aluminum engine blocks and components. With Crest’s proven track record of producing blocks that endure the rigors of high-output engines, combined with our expertise in high-powered aftermarket Subaru builds, this collaboration delivers an unbeatable foundation for those pushing the limits of performance.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"Solid Billet Aluminum Subaru EJ25 case halves\" loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/Unknown-355.jpg\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eSOLID BILLET ALUMINUM PLATFORM WITH 100% NEW COMPONENTS\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe Stage X Billet Short Block case is precision machined by Crest CNC using 6061-T6 Aerospace Aluminum and reinforced with Darton Ductile Iron Sleeves. The billet case halves are meticulously hand-assembled by our expert Subaru technicians, and include the IAG Spec Billet crankshaft, custom IAG-Spec +2mm Tri-Beam connecting rods and ARP 625+ rod bolts, along with IAG Spec JE 99.5mm FSR 2618 forged pistons. The Stage X Short Block also includes ACL or King rod and main bearings and is balanced and blueprinted. Finally, the case halves are sealed with new ARP main\/case bolts and sealant.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"\" loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/Unknown-356.jpg\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eNEXT-LEVEL INNOVATION\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe IAG Performance \/ Crest CNC 2.5L Subaru Billet Aluminum Short Block is engineered with numerous advanced features that enhance strength and reliability. Precision machined from solid aluminum billet and hard anodized to prevent marking or staining, this short block is multiple times stiffer and stronger than the stock case, making it ideal for high-powered builds. Additionally, increased material thickness has been strategically added in all known weak points, particularly around the head studs and bottom end location, enhancing the block's resilience.\u003cbr\u003e\u003cbr\u003eAdditional innovations featured in the Stage X Short Block include a unique 4-bolt bottom end design that provides extra strength and stability. The block’s bolt threads are rolled, rather than conventionally cut, ensuring a solid grip on hardware. Not only does this short block maintain full cooling system operations, but it incorporates the use of its radiused coolant and oil galleries for improved flow and less foaming and\/or turbulence. Finally, the Stage X Short Block is compatible with all factory engine bay ancillaries (i.e., AC\/PS\/etc.).\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"IAG Fire-Lock EJ25 Subaru Head Gasket System \" loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/Unknown-363.jpg\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eIAG’S FIRE-LOCK SYSTEM: NO MORE HEAD GASKET WORRIES\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe IAG Performance \/ Crest CNC 2.5L Subaru Billet Aluminum Short Block features our proprietary \"Fire-Lock\" receiver groove machining and is compatible with our IAG \"Fire-Lock\" Head Gaskets. This system has been proven in our record setting race cars to be the strongest Subaru head gasket system ever produced. To achieve these results, our engineers separated the combustion chamber sealing from the fluid sealing aspects of the head gaskets. Our machinists carefully machine a lip at the top of each cylinder to accept the \"Fire-Lock\" ring. With the ring locked in place, it stands firmly above the deck, providing a superior seal. The separate gasket bodies take care of sealing oil and coolant passages, while keeping them out of the combustion chamber. 14mm Head studs hold the assembly together. (IAG \"Fire-Lock\" Head Gaskets and Head Studs Sold Separately).\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"Custom JE Pistons\" loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/Unknown-370.jpg\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eCUSTOM JE PISTONS\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe IAG Stage X Short Block features JE 99.5mm FSR 2618 custom pistons, engineered to deliver outstanding performance for both street driving, as well as for drag and rally racing applications. These pistons feature thicker ringlands and are treated with electroless nickel-plating, resulting in a stronger piston that can stand up to highly boosted applications. Additionally, they come equipped with .250\" \/ .927” H13 tool steel wrist pins, providing a significant upgrade over standard chromoly pins, ensuring enhanced reliability under extreme conditions.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"IAG-Spec JE Forged Pistons\" loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/Unknown-371.jpg\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eBUILT TO PERFORM\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eA common failure point of the OEM Subaru short block are the piston ringlands. The metal ledges on the pistons that hold the compression rings in place can withstand regular usage but are prone to failure when used with modified components. Cracked or broken ringlands often lead to increased oil consumption and eventual bearing failure if the oil is not closely monitored. In contrast, the increased ringland thickness on the custom JE pistons used in the IAG Stage X Short Block are designed to match up to its high-powered capabilities, ensuring durability and reliability even under extreme-performance conditions.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"IAG-Spec JE Pistons , Rings, Pins, Clips\" loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/Unknown-372.jpg\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eFORGED ALUMINUM ALLOY\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe OEM EJ25 pistons continue to be produced using a hypereutectic cast design, which is susceptible to irregularities in both the casting process and the materials used, leading to potential weaknesses. These cast pistons simply lack the strength needed to handle the extreme power output of this high-performance short block. This is where our custom JE pistons come in; forged from a durable 2618 T6 Alloy with a unique silicone additive, these JE pistons effectively absorb the direct shock and impact of combustion. Engineered to withstand ringland damage due to detonation and preignition, they feature a higher strength material and have been custom designed to feature thicker ringlands.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"Assembled IAG \/ Crest Stage X Subaru EJ25 Billet Short Block\" loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/Unknown-373.jpg\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003ePROFESSIONALLY ASSEMBLED AND READY TO INSTALL\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eOur team of certified Subaru specialists at IAG Performance takes great care in assembling each IAG Stage X Short Block. These specialists have now built over 14,000 Subaru engines and counting. Equipped with an advanced selection of tooling and state-of-the-art equipment, we guarantee the quality of all our engine blocks. Each block is meticulously crafted and thoroughly checked, ensuring the highest standards of quality assurance. IAG’s hand-assembled Short Blocks make it easy to upgrade your EJ25 Subaru engine, just leave the technical work to us, and we’ll provide you with a superior short block that’s ready to install. \u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eNEED HELP CHOOSING A BLOCK?\u003c\/h2\u003e\n\u003cdiv class=\"video-embed\" style=\"position:relative;width:100%;padding-bottom:56.25%;height:0;overflow:hidden;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/AMytJ0EHOZo?start=0\u0026amp;end=0\u0026amp;autoplay=0\u0026amp;loop=0\u0026amp;rel=1\" allowfullscreen loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eWe made this video to highlight the differences between each of our short blocks and to help you choose the best one for your performance goals and budget. Our Build Advisors and Customer Support staff can also assist you with any questions or concerns. Just click the button below for assistance.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"CEI\" loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/Unknown-378.png\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eQUALITY GUARANTEED\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eWe stand behind every hand-built engine we produce. IAG's Standard Short Block Workmanship Warranty covers your short block for 12 months or 12,000 miles. We have also teamed up with a selection of IAG Certified Installation Facilities which offer up to a 24 month\/24,000 mile workmanship warranty when the engine is purchased, installed, and tuned by that IAG Certified Installer.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003ePOWER RATING\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003ePower:The IAG \/ Crest CNC Stage X Short Block has a power output rating of 1150+BHP.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eHARDWARE \/ SEAL OPTION\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eNot planning on reusing your original short block service plugs and covers? IAG offers a simple comprehensive cover and seal kit that includes (1) Rear main seal, (3) OEM wrist pin plugs, (3) OEM wrist pin plug washers, (1) OEM separator cover, (6) OEM separator cover bolts, (1) OEM wrist pin service cover, (1) OEM wrist pin service cover O-ring and (2) OEM wrist pin service cover screws. *If you are reusing your original wrist pin service plugs and covers, always replace the (3) OEM wrist pin plug washers and (1) wrist pin service cover O-ring before installing a short block to avoid potential leaks. *Never reuse a rear main seal on a new short block.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eHEAD GASKET OPTION\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\n\u003cp\u003eAfter years of research and development testing, the IAG Performance Fire-Lock head gasket is the newest solution to preventing head gasket failure on high horsepower and high boost Subaru EJ25 engines. This solution is loosely derived from diesel technology where a counterbore step is machined around each cylinder bore allowing specially sized fire rings to drop into the machined area and head gasket bores. The shims are designed to create a compression seal once the heads are installed and torqued into place. IAG fire rings are manufactured to a very strict tolerance from a proprietary alloy and are then put through a heat treatment process. The gaskets are manufactured from an asbestos-free composite raw material and feature a silicone based beading applied to critical areas to improve sealing around all water and oil passages. The combination of the alloy compression shims and gaskets assure maximum sealing for a Subaru EJ25 turbocharged engine.*The IAG Fire-Lock gaskets require machine work for installation and are recommended for use with 14mm head stud hardware.*The gaskets are sold in pairs with four Fire-Lock rings.Features:\u003c\/p\u003e\n\u003cp\u003eInstall Notes:1. If a block or cylinder head was previously o-ringed the groove must be filled and resurfaced before using this type of gasket.2. These gaskets require IAG ARP 14mm head studs to achieve the required torque necessary for proper installation.3. Due to the required torque, any block that was previously honed will need to go to the next size overbore.4. Future servicing will require cylinder head resurfacing due to an imprint left from the Fire-Lock rings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eOIL PICKUP \/ OIL BAFFLE \/ WINDAGE TRAY OPTIONS\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe IAG Performance Subaru WRX \/ STI oil pickup was designed by Tigwerks to replace the OEM EJ25 oil pickup, which is prone to failure. It's a well-known fact that the OEM oil pickups often crack and fail which, in most cases, destroys your engine from lack of oil pressure. To avoid the cracking failures seen in the OEM oil pickup tubes, the Tigwerks oil pickup is manufactured from heavy-gauge steel tubing that is 3x thicker than OEM. Additionally, it features a flange machined from 3\/8\"  1018 CR steel to mate with the block, sealed with a Viton O-ring. The integrated heavy-duty mounting bracket uses two mounting points rather than the OEM single mounting point. Furthermore, the oil pickup features a formed bottom with an OEM style mesh screen for proper filtration. The TIG-welded oil pickup's increased material thickness, matched with the two-point heavy-duty mounting bracket, helps ensure that it does not fatigue and fail over time like an OEM unit.The IAG Oil Control Baffle and Windage Tray System is designed to limit potential blow-by and prevent oil starvation in your Subaru's WRX \/ STI EJ engine during high rpm and high g-force driving. Through the use of Viton one-way flapper valves on our baffle and louvers in our windage tray, oil is prevented from reentering the upper crankcase area and is directed down into the oil pan to ensure plentiful supply to the oil pickup. IAG's integrated two-piece Oil Control Baffle and Windage Tray System is designed to work with our own oil pickup, as well as other oil pickups*. The baffle fits neatly in the engine crankcase area, allowing normal installation of the OEM oil pan and popular aftermarket pans*.Oil Pickup \u0026amp; Baffle Install Notes\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eOIL PUMP OPTION\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\n\u003cp\u003eThe 11mm Subaru Oil pump is one of the most popular off the shelf pumps to use on EJ25 engines. Originally equipped on the 2008-21 STI Dual AVCS engines, it provides an adequate amount of pressure and flow that fits the needs of many OE and built engines. But, as with almost anything, there is room for improvement.\u003c\/p\u003e\n\u003cp\u003eIncreasing oil flow volume and pressure in an EJ25 ensures that the bearings have sufficient oil film under all power levels and driving conditions. Additional oil flow to the engine provides a greater oil reserve to operate the AVCS solenoids and cam gears - giving you more consistent performance results.\u003c\/p\u003e\n\u003cp\u003eThe IAG Stage 2 CNC Ported 11mm oil pump was developed over years of servicing street and racing engines. In that time IAG has tested and utilized the majority of the popular Subaru oil pumps available on the market (JDM, Cosworth, ACL etc.) for customer, personal and racing vehicles.\u003c\/p\u003e\n\u003cp\u003eOver the last few years if you wanted an upgraded oil pump over the stock 11mm you would either buy a hand ported model from a trusted source, or often an OEM JDM (Japanese Market) 12mm pump. We believe that we have developed a better alternative. The IAG Stage 2 CNC Ported 11mm oil pumps have shown through lab testing on a Spintron Machine that it will outperform a JDM 12mm.\u003c\/p\u003e\n\u003cp\u003eThe Stage 2 Oil pump is a cost effective solution that outperforms the market standards. This pump has been extensively tested on street cars, track cars, and on our in-house Spintron to ensure consistent and repeatable performance.\u003c\/p\u003e\n\u003cp\u003eEach IAG Stage 2 oil pump starts life as an OEM spec 11mm oil pump, straight from Subaru. IAG completely disassembles the new oil pump including pulling the rotors, backing plate \u0026amp; pressure relief valve. Next, the main body is fixtured in our in-house 5-Axis Centroid CNC machine where the inlet and outlet passageways are CNC ported. This allows for a larger, more consistent pathway for the oil into and out of the gerotor internals and helps to prevent cavitation. The Oil Pump Outlet where it meets the engine block is also CNC “Port Matched”, for a perfect transition into the engine block. The Inlet and Outlet sides of the gerotor are also opened up on the CNC mill to reduce inlet side cavitation, and to reduce outlet side pressure drops.\u003c\/p\u003e\n\u003cp\u003eThe pressure relief valve piston is REM Polished, which provides a non-directional, low Ra, polished finish. This reduces friction, heat and possibility of the relief valve piston galling and sticking, a common failure point on the OEM pumps.\u003c\/p\u003e\n\u003cp\u003eThe piston is reinstalled and confirmed to operate correctly. The rotors are measured and checked to be within the manufacturer's specification - aka Blueprinted, and installed next. The pump is then put together with a light coating of assembly lube to reduce friction and scuffing and aid in priming on first start up.\u003c\/p\u003e\n\u003cp\u003eFinally, the backing plate is installed. Loctite is added to the hardware, and each piece receives a painted mark after it is correctly torqued. The pump ships ready to install, with all hardware and seals required for installation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"IAG Performance","offers":[{"title":"Default Title","offer_id":48066713223386,"sku":"IAG-ENG-SX25","price":17999.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/IAG-ENG-SX25-01__03126.1729104343.1280.1280.jpg?v=1781533638"},{"product_id":"iag-550-2-5l-subaru-short-block-for-wrx-sti-legacy-gt-forester-xt-550-bhp","title":"IAG 550 2.5L Subaru Short Block for WRX, STI, Legacy GT, Forester XT - 550 BHP","description":"\u003ch2 style=\"text-align:center;\"\u003eIAG 550 EJ25 2.5L SUBARU SHORT BLOCK\u003c\/h2\u003e\n\u003chr style=\"border:none;border-top:1px solid #e0e0e0;margin:24px 0;\"\u003e\n\u003cdiv class=\"video-embed\" style=\"position:relative;width:100%;padding-bottom:56.25%;height:0;overflow:hidden;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/gzqim5R6EUo?start=0\u0026amp;end=0\u0026amp;autoplay=1\u0026amp;loop=1\u0026amp;mute=1\u0026amp;playlist=gzqim5R6EUo\u0026amp;version=3\u0026amp;rel=0\" allowfullscreen loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003chr style=\"border:none;border-top:1px solid #e0e0e0;margin:24px 0;\"\u003e\n\u003cimg alt=\"IAG 550 2.5L Subaru Case Half Set for WRX, STI, Legacy GT, Forester XT\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/33e99668-b13d-437f-a25f-80ec99e19b8f\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eBUILT FOR BOOST\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eDesigned for modified EJ25 Subarus, the IAG 550 Short Block is a sturdy upgrade that is capable of handling higher cylinder pressures created by increased boost levels. The OEM Subaru connecting rods and pistons (yes, even the STI RA) aren’t strong enough to take on the additional engine load of a larger turbocharger or an increase in boost pressure, which can quickly lead to costly engine failure. Built for boost, IAG’s 550 Short Block solves this problem by incorporating the use of high performance internal components that can stand up to extra load on the motor, ensuring longevity and reliability in high-performance scenarios.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"IAG 550 2.5L Subaru Short Block Connecting Rods for WRX, STI, Legacy GT, Forester XT\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/e4d9d8ef-eb58-4c8a-ba3a-108d8c0f573b\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eIAG SPEC H-BEAM FORGED CONNECTING RODS\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe IAG 550 Short Block features IAG Spec H-Beam forged connecting rods with ARP2000 rod bolts, along with ACL or King race rod bearings. These structurally optimized connecting rods provide solid support to your high powered EJ25 Subaru engine. Capable of withstanding higher RPM conditions, the ACL and King race rod bearings are a perfect match for this resilient and capable short block. \u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"IAG 550 2.5L Subaru Short Block Forged Pistons for WRX, STI, Legacy GT, Forester XT\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/80d9c91d-0b41-4242-a739-2950226da5b1\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eIAG SPEC JE FORGED PISTONS\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eTo create this high strength short block, IAG teamed up with JE Pistons to create a high performing piston strong enough to match up to the capabilities of the 550 Short Block. With over seventy years of experience in manufacturing ready-to-race forged pistons, JE Pistons has been an invaluable partner in the development of the IAG Spec JE 99.75mm Forged Pistons installed in the IAG 550 Short Block.\u003cbr\u003e\u003cbr\u003eThese 2618 T6 Alloy high-strength pistons have been specifically designed to support increased cylinder pressures which come with more boost. This is accomplished by using an asymmetrical skirt design instead of the traditional full-round skirt, which also significantly reduces piston weight. Another design attribute of the IAG Spec JE Forged Pistons is the smooth flowing radii on the domes and dishes, which promotes superior flame travel. The pistons are securely fastened to the rods with .905 x 2.250\" x .180\" wall carbon steel wrist pins combined with Tru Arc locks.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"Comparison of Type RA and IAC-Spec JE Forged Pistons.\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/d8a84ae3-8f44-48d6-bd97-5ba238de6905\/-\/format\/auto\/-\/quality\/normal\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eWHY UPGRADE?\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe most common failure point of the OEM Subaru STI EJ257 short blocks are the piston ringlands. The metal ledges on the pistons that hold the compression rings in place can stand up to regular usage, but are susceptible to failure when used in conjunction with modifications. Cracked or broken ringlands often result in increased oil consumption and eventual bearing failure if the oil level is not closely monitored. While Subaru’s RA block has slightly stronger pistons than the STI EJ257, they are still prone to the same type of failure caused by damaged ringlands.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"IAG 550 2.5L Subaru Short Block for WRX, STI, Legacy GT, Forester XT\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/2a3088aa-3f0f-4f22-a25a-65dee3837b27\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eSUPERIOR DESIGN\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe pistons in the OEM Subaru STI EJ257 and the RA blocks continue to be produced using a hypereutectic cast design. This casting method is susceptible to irregularities in both the casting process and the materials used, leading to potential weaknesses in the pistons. This is where the IAG Spec JE Piston comes in; forged from a durable 2618 T6 Alloy with a unique silicone additive, these JE pistons effectively absorb the direct shock and impact of combustion. Engineered to withstand ringland damage due to detonation and preignition, they feature a higher strength material and have been custom designed to feature thicker ringlands.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"IAG 550 2.5L Subaru Short Block Crankshaft for WRX, STI, Legacy GT, Forester XT\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/f6ce92ed-b715-40ba-8ddf-7cad5327add7\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eBUILT WITH 100% NEW COMPONENTS\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eEach IAG 550 Short Block starts with a brand-new EJ25 Subaru 2.5L case providing a solid foundation for its upgraded components. The case halves are bored and honed to 99.75mm, then measured and assembled using a new 2017+ Subaru 2.5L nitride-treated STI crankshaft, which is matched to ACL or King race main bearings. The IAG 550 Short Block also features IAG Spec H-Beam Connecting Rods with ARP2000 rod bolts, along with ACL or King race rod bearings. The case halves are sealed with new OEM main case bolts and sealant. Finally, a set of IAG Spec JE 99.75mm Forged Pistons are carefully selected, measured, and installed to finish off the short block.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"Professionally Assembled Short Block\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/76dc05b6-5dc3-46d8-a835-0a9e6d037434\/-\/format\/auto\/-\/quality\/normal\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003ePROFESSIONALLY ASSEMBLED AND READY TO INSTALL\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eOur team of certified Subaru specialists at IAG Performance takes great care in assembling each IAG 550 Short Block. These specialists have now built over 16,000 Subaru engines and counting. Equipped with an advanced selection of tooling and state-of-the-art equipment, we guarantee the quality of all our engine blocks. Each block is meticulously crafted and thoroughly checked, ensuring the highest standards of quality assurance. IAG’s assembled Short Blocks make it easy to upgrade your EJ25 Subaru engine, just leave the technical work to us, and we’ll provide you with a superior short block that’s ready to install. \u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/cd4d2b1c-e805-43e9-9f9e-49900fce912e\/-\/format\/auto\/-\/quality\/normal\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eWE’VE GOT YOU COVERED\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eWhile a new OEM block from Subaru doesn't come with a warranty when installed in a different vehicle, IAG Performance supports your purchase with a 12-month or 12,000-mile workmanship warranty for the IAG 550 Short Block. We take that even further to a 24-month, 24,000-mile workmanship warranty when purchased, installed, and tuned at one of our Certified Engine Installation facilities around the country. At IAG Performance, we are committed to your satisfaction and the lasting quality of our products. Our goal is to deliver a superior product that will last you for miles to come.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eNEED HELP CHOOSING A BLOCK?\u003c\/h2\u003e\n\u003cdiv class=\"video-embed\" style=\"position:relative;width:100%;padding-bottom:56.25%;height:0;overflow:hidden;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/AMytJ0EHOZo?start=0\u0026amp;end=0\u0026amp;autoplay=0\u0026amp;loop=0\u0026amp;rel=1\" allowfullscreen loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eWe made this video to highlight the differences between each of our short blocks and to help you choose the best one for your performance goals and budget. Our Build Advisors and Customer Support staff can also assist you with any questions or concerns. Just click the button below for assistance.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"CEI\" loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/Unknown-378.png\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eQUALITY GUARANTEED\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eWe stand behind every hand-built engine we produce. IAG's Standard Short Block Workmanship Warranty covers your short block for 12 months or 12,000 miles. We have also teamed up with a selection of IAG Certified Installation Facilities which offer up to a 24 month\/24,000 mile workmanship warranty when the engine is purchased, installed, and tuned by that IAG Certified Installer.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003ePOWER RATING\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003ePower:The IAG 550 Short Block has a power output rating of 550 BHP\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eHARDWARE \/ SEAL OPTION\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eNot planning on reusing your original short block service plugs and covers? IAG offers a simple comprehensive cover and seal kit that includes (1) Rear main seal, (3) OEM wrist pin plugs, (3) OEM wrist pin plug washers, (1) OEM separator cover, (6) OEM separator cover bolts, (1) OEM wrist pin service cover, (1) OEM wrist pin service cover O-ring and (2) OEM wrist pin service cover screws. *If you are reusing your original wrist pin service plugs and covers always replace the (3) OEM wrist pin plug washers and (1) wrist pin service cover O-ring before installing a short block to avoid potential leaks. *Never reuse a rear main seal on a new short block.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eOIL PICKUP \/ OIL BAFFLE \/ WINDAGE TRAY OPTIONS\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe IAG Performance Subaru WRX \/ STI oil pickup was designed by Tigwerks to replace the OEM EJ25 oil pickup, which is prone to failure. It's a well-known fact that the OEM oil pickups often crack and fail which, in most cases, destroys your engine from lack of oil pressure. To avoid the cracking failures seen in the OEM oil pickup tubes, the Tigwerks oil pickup is manufactured from heavy-gauge steel tubing that is 3x thicker than OEM. Additionally, it features a flange machined from 3\/8\" 1018 CR steel to mate with the block, sealed with a Viton O-ring. The integrated heavy-duty mounting bracket uses two mounting points rather than the OEM single mounting point. Furthermore, the oil pickup features a formed bottom with an OEM style mesh screen for proper filtration. The TIG-welded oil pickup's increased material thickness, matched with the two-point heavy-duty mounting bracket, helps ensure that it does not fatigue and fail over time like an OEM unit.The IAG Oil Control Baffle and Windage Tray System is designed to limit potential blow-by and prevent oil starvation in your Subaru's WRX \/ STI EJ engine during high rpm and high g-force driving. Through the use of Viton one-way flapper valves on our baffle and louvers in our windage tray, oil is prevented from reentering the upper crankcase area and is directed down into the oil pan to ensure plentiful supply to the oil pickup. IAG's integrated two-piece Oil Control Baffle and Windage Tray System is designed to work with our own oil pickup, as well as other oil pickups*. The baffle fits neatly in the engine crankcase area, allowing normal installation of the OEM oil pan and popular aftermarket pans*.Oil Pickup \u0026amp; Baffle Install Notes\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eOIL PUMP OPTION\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\n\u003cp\u003eThe 11mm Subaru Oil pump is one of the most popular off the shelf pumps to use on EJ25 engines. Originally equipped on the 2008-21 STI Dual AVCS engines, it provides an adequate amount of pressure and flow that fits the needs of many OE and built engines. But, as with almost anything, there is room for improvement.\u003c\/p\u003e\n\u003cp\u003eIncreasing oil flow volume and pressure in an EJ25 ensures that the bearings have sufficient oil film under all power levels and driving conditions. Additional oil flow to the engine provides a greater oil reserve to operate the AVCS solenoids and cam gears - giving you more consistent performance results.\u003c\/p\u003e\n\u003cp\u003eThe IAG Stage 2 CNC Ported 11mm oil pump was developed over years of servicing street and racing engines. In that time IAG has tested and utilized the majority of the popular Subaru oil pumps available on the market (JDM, Cosworth, ACL etc.) for customer, personal and racing vehicles.\u003c\/p\u003e\n\u003cp\u003eOver the last few years if you wanted an upgraded oil pump over the stock 11mm you would either buy a hand ported model from a trusted source, or often an OEM JDM (Japanese Market) 12mm pump. We believe that we have developed a better alternative. The IAG Stage 2 CNC Ported 11mm oil pumps have shown through lab testing on a Spintron Machine that it will outperform a JDM 12mm.\u003c\/p\u003e\n\u003cp\u003eThe Stage 2 Oil pump is a cost effective solution that outperforms the market standards. This pump has been extensively tested on street cars, track cars, and on our in-house Spintron to ensure consistent and repeatable performance.\u003c\/p\u003e\n\u003cp\u003eEach IAG Stage 2 oil pump starts life as an OEM spec 11mm oil pump, straight from Subaru. IAG completely disassembles the new oil pump including pulling the rotors, backing plate \u0026amp; pressure relief valve. Next, the main body is fixtured in our in-house 5-Axis Centroid CNC machine where the inlet and outlet passageways are CNC ported. This allows for a larger, more consistent pathway for the oil into and out of the gerotor internals and helps to prevent cavitation. The Oil Pump Outlet where it meets the engine block is also CNC “Port Matched”, for a perfect transition into the engine block. The Inlet and Outlet sides of the gerotor are also opened up on the CNC mill to reduce inlet side cavitation, and to reduce outlet side pressure drops.\u003c\/p\u003e\n\u003cp\u003eThe pressure relief valve piston is REM Polished, which provides a non-directional, low Ra, polished finish. This reduces friction, heat and possibility of the relief valve piston galling and sticking, a common failure point on the OEM pumps.\u003c\/p\u003e\n\u003cp\u003eThe piston is reinstalled and confirmed to operate correctly. The rotors are measured and checked to be within the manufacturer's specification - aka Blueprinted, and installed next. The pump is then put together with a light coating of assembly lube to reduce friction and scuffing and aid in priming on first start up.\u003c\/p\u003e\n\u003cp\u003eFinally, the backing plate is installed. Loctite is added to the hardware, and each piece receives a painted mark after it is correctly torqued. The pump ships ready to install, with all hardware and seals required for installation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"IAG Performance","offers":[{"title":"Default Title","offer_id":48066713682138,"sku":"IAG-ENG-S550","price":4499.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/api13uxz3__40268.1633558626.1280.1280__66374.1678223271.1280.1280.jpg?v=1781533637"},{"product_id":"iag-750-ej25-subaru-closed-deck-short-block-for-wrx-sti-lgt-fxt-750bhp","title":"IAG 750 EJ25 Subaru Closed Deck Short Block For WRX, STI, LGT, FXT - 750BHP","description":"\u003ch2 style=\"text-align:center;\"\u003eIAG 750 EJ25 2.5L SUBARU SHORT BLOCK\u003c\/h2\u003e\n\u003chr style=\"border:none;border-top:1px solid #e0e0e0;margin:24px 0;\"\u003e\n\u003cdiv class=\"video-embed\" style=\"position:relative;width:100%;padding-bottom:56.25%;height:0;overflow:hidden;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/R85V-d4AQgE?start=0\u0026amp;end=0\u0026amp;autoplay=1\u0026amp;loop=1\u0026amp;mute=1\u0026amp;playlist=R85V-d4AQgE\u0026amp;version=3\u0026amp;rel=0\" allowfullscreen loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003chr style=\"border:none;border-top:1px solid #e0e0e0;margin:24px 0;\"\u003e\n\u003cimg alt=\"IAG H Beam Rods\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/7396b637-810d-412e-ad6b-c50ccaf8b58f\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eTHE PROBLEM SOLVER\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe IAG 750 Short Block is designed to solve the majority of common problems which plague modified EJ25 engines, especially at higher horsepower levels. The IAG 750 short block builds off our IAG 550 block's strengths by adding our proprietary closed deck system. This system strengthens and supports the cylinder walls to prevent cracks which can occur with increased cylinder pressures. (This is the most common issue when increasing horsepower.) The IAG 750 also features 99.75mm JE Forged Pistons and IAG Spec H beam connecting rods, along with ACL or King Race bearings. These components also significantly strengthen the common failure points such as cracked ring lands and spun bearings.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"EJ25 STI Crankshaft\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/4134626c-1677-4b40-ac18-6a8639811c32\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eBUILT WITH 100% NEW COMPONENTS\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe IAG 750 Short Block starts with brand new Subaru 2.5L engine case halves. Our machinists machine the assembled case halves in our Haas VF-4SS CNC mill to accept the IAG Closed Deck inserts, transforming the block into a solid deck. Next, a deck pair of deck plates are attached and the short block is bored and honed to 99.75mm in our in-house Sunnen SV-30 computer controlled cylinder hone. IAG's in-house honing process allows us to set custom piston to wall clearances to ensure quiet operation and reduced oil consumption. The modified case halves are then assembled using a new 2017+ Subaru 2.5L nitride treated STI crankshaft and IAG-Spec Tuff H-Beam connecting rods with ARP rod bolts. IAG Short blocks feature ACL or King Race rod and main bearings and are all balanced and blueprinted. Finally, the case halves are sealed with new OEM main\/case bolts and sealant.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"IAG 750 Closed Deck Block\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/c1b2251b-e254-40a8-8a1f-1f288200b73b\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eCLOSED DECK FOR EXTRA STRENGTH\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eOur unique closed deck system significantly increases the strength of the OEM case halves. This process supports the cylinder walls at the top of the case in order to prevent flexing and possible cracking where the case bolt reliefs are cut into the back of the cylinder wall. \u003cbr\u003eDuring the installation process we machine the assembled case halves in our Haas VF-4SS CNC mill to accept the IAG Closed Deck inserts. Once the case has been machined we heat it in an oven while freezing the specially machined inserts with liquid nitrogen. The inserts are then pressed into place and then machined to a mirror finish. \u003cbr\u003eThe unique inserts feature small passages that allow needed coolant flow to the deck surface. This means that the closed deck system does not affect the block's cooling ability and will not cause overheating, even in daily drivers. \u003cbr\u003e\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"IAG 750 Pistons and Rings\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/fd58140d-437d-41ba-bfcf-936ef06a1ace\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eFORGED PISTONS, DESIGNED FOR BOOST\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eEach IAG 750 Short Block features IAG Spec JE FSR 99.75mm Forged Pistons. These 2618 T6 Alloy high-strength pistons have been specifically designed to support increased cylinder pressures which come with more boost. FSR forgings reduce mass and wear caused by friction without sacrificing strength. This is accomplished by using an asymmetrical skirt design instead of the traditional full-round skirt, also this reduces weight significantly. Featuring smooth flowing radii on the domes and dishes, the design promotes excellent flame travel. The pistons are secured to the rods with .905 x 2.250\" x .210\" wall 9310 steel wrist pins with Tru Arc locks. The thicker steel wrist pins support additional power over the standard .180\" pins.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"Hybrid Pistons\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/0be2a80e-1b47-454d-b22a-36381c9613d7\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eOPTIONAL \"HYBRID\" PISTONS FOR EJ20 HEADS\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eIf you plan to use the IAG 750 Short Block with EJ20 Cylinder Heads, make sure to select the \"Hybrid Pistons\" option at checkout. These specially designed JE pistons allow the use of EJ20 cylinder heads without the requirement for a chamber matching service to be performed to the cylinder heads. This option is great for international clients who are not able to send their cylinder heads in for modification. This also works great for USDM EJ20 owners who prefer to use a 2.5l short block. The 9.5:1 Compression JE FSR piston set includes .905 x 2.250 straight wall carbon steel wrist pins with Tru Arc locks along with a complete ring set.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eNEED HELP CHOOSING A BLOCK?\u003c\/h2\u003e\n\u003cdiv class=\"video-embed\" style=\"position:relative;width:100%;padding-bottom:56.25%;height:0;overflow:hidden;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/AMytJ0EHOZo?start=0\u0026amp;end=0\u0026amp;autoplay=0\u0026amp;loop=0\u0026amp;rel=1\" allowfullscreen loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eWe made this video to highlight the differences between each of our short blocks and to help you choose the best one for your performance goals and budget. Our Build Advisors and Customer Support staff can also assist you with any questions or concerns. Just click the button below for assistance.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"CEI\" loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/Unknown-378.png\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eQUALITY GUARANTEED\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eWe stand behind every hand-built engine we produce. IAG's Standard Short Block Workmanship Warranty covers your short block for 12 months or 12,000 miles. We have also teamed up with a selection of IAG Certified Installation Facilities which offer up to a 24 month\/24,000 mile workmanship warranty when the engine is purchased, installed, and tuned by that IAG Certified Installer.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003ePOWER RATING\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003ePower:The IAG 750 Short Block has a power output rating of 750 BHP\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eHARDWARE \/ SEAL OPTION\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eNot planning on reusing your original short block service plugs and covers? IAG offers a simple comprehensive cover and seal kit that includes (1) Rear main seal, (3) OEM wrist pin plugs, (3) OEM wrist pin plug washers, (1) OEM separator cover, (6) OEM separator cover bolts, (1) OEM wrist pin service cover, (1) OEM wrist pin service cover O-ring and (2) OEM wrist pin service cover screws. *If you are reusing your original wrist pin service plugs and covers always replace the (3) OEM wrist pin plug washers and (1) wrist pin service cover O-ring before installing a short block to avoid potential leaks. *Never reuse a rear main seal on a new short block.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eOIL PICKUP \/ OIL BAFFLE \/ WINDAGE TRAY OPTIONS\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe IAG Performance Subaru WRX \/ STI oil pickup was designed by Tigwerks to replace the OEM EJ25 oil pickup, which is prone to failure. It's a well-known fact that the OEM oil pickups often crack and fail which, in most cases, destroys your engine from lack of oil pressure. To avoid the cracking failures seen in the OEM oil pickup tubes, the Tigwerks oil pickup is manufactured from heavy-gauge steel tubing that is 3x thicker than OEM. Additionally, it features a flange machined from 3\/8\"  1018 CR steel to mate with the block, sealed with a Viton O-ring. The integrated heavy-duty mounting bracket uses two mounting points rather than the OEM single mounting point. Furthermore, the oil pickup features a formed bottom with an OEM style mesh screen for proper filtration. The TIG-welded oil pickup's increased material thickness, matched with the two-point heavy-duty mounting bracket, helps ensure that it does not fatigue and fail over time like an OEM unit.The IAG Oil Control Baffle and Windage Tray System is designed to limit potential blow-by and prevent oil starvation in your Subaru's WRX \/ STI EJ engine during high rpm and high g-force driving. Through the use of Viton one-way flapper valves on our baffle and louvers in our windage tray, oil is prevented from reentering the upper crankcase area and is directed down into the oil pan to ensure plentiful supply to the oil pickup. IAG's integrated two-piece Oil Control Baffle and Windage Tray System is designed to work with our own oil pickup, as well as other oil pickups*. The baffle fits neatly in the engine crankcase area, allowing normal installation of the OEM oil pan and popular aftermarket pans*.Oil Pickup \u0026amp; Baffle Install Notes\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eOIL PUMP OPTION\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\n\u003cp\u003eThe 11mm Subaru Oil pump is one of the most popular off the shelf pumps to use on EJ25 engines. Originally equipped on the 2008-21 STI Dual AVCS engines, it provides an adequate amount of pressure and flow that fits the needs of many OE and built engines. But, as with almost anything, there is room for improvement.\u003c\/p\u003e\n\u003cp\u003eIncreasing oil flow volume and pressure in an EJ25 ensures that the bearings have sufficient oil film under all power levels and driving conditions. Additional oil flow to the engine provides a greater oil reserve to operate the AVCS solenoids and cam gears - giving you more consistent performance results.\u003c\/p\u003e\n\u003cp\u003eThe IAG Stage 2 CNC Ported 11mm oil pump was developed over years of servicing street and racing engines. In that time IAG has tested and utilized the majority of the popular Subaru oil pumps available on the market (JDM, Cosworth, ACL etc.) for customer, personal and racing vehicles.\u003c\/p\u003e\n\u003cp\u003eOver the last few years if you wanted an upgraded oil pump over the stock 11mm you would either buy a hand ported model from a trusted source, or often an OEM JDM (Japanese Market) 12mm pump. We believe that we have developed a better alternative. The IAG Stage 2 CNC Ported 11mm oil pumps have shown through lab testing on a Spintron Machine that it will outperform a JDM 12mm.\u003c\/p\u003e\n\u003cp\u003eThe Stage 2 Oil pump is a cost effective solution that outperforms the market standards. This pump has been extensively tested on street cars, track cars, and on our in-house Spintron to ensure consistent and repeatable performance.\u003c\/p\u003e\n\u003cp\u003eEach IAG Stage 2 oil pump starts life as an OEM spec 11mm oil pump, straight from Subaru. IAG completely disassembles the new oil pump including pulling the rotors, backing plate \u0026amp; pressure relief valve. Next, the main body is fixtured in our in-house 5-Axis Centroid CNC machine where the inlet and outlet passageways are CNC ported. This allows for a larger, more consistent pathway for the oil into and out of the gerotor internals and helps to prevent cavitation. The Oil Pump Outlet where it meets the engine block is also CNC “Port Matched”, for a perfect transition into the engine block. The Inlet and Outlet sides of the gerotor are also opened up on the CNC mill to reduce inlet side cavitation, and to reduce outlet side pressure drops.\u003c\/p\u003e\n\u003cp\u003eThe pressure relief valve piston is REM Polished, which provides a non-directional, low Ra, polished finish. This reduces friction, heat and possibility of the relief valve piston galling and sticking, a common failure point on the OEM pumps.\u003c\/p\u003e\n\u003cp\u003eThe piston is reinstalled and confirmed to operate correctly. The rotors are measured and checked to be within the manufacturer's specification - aka Blueprinted, and installed next. The pump is then put together with a light coating of assembly lube to reduce friction and scuffing and aid in priming on first start up.\u003c\/p\u003e\n\u003cp\u003eFinally, the backing plate is installed. Loctite is added to the hardware, and each piece receives a painted mark after it is correctly torqued. The pump ships ready to install, with all hardware and seals required for installation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"IAG Performance","offers":[{"title":"No, I am using EJ25 Cylinder Heads","offer_id":48066714108122,"sku":"IAG-ENG-S750","price":5499.99,"currency_code":"USD","in_stock":true},{"title":"Yes, I will be using this block with EJ20 Cylinder Heads","offer_id":48066714075354,"sku":"IAG-ENG-S750IH","price":5599.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apivskc2d__78153.1633558767.1280.1280__86239.1678302977.1280.1280.jpg?v=1781533640"},{"product_id":"iag-1150-high-compression-2-5l-subaru-closed-deck-short-block-for-wrx-sti-lgt-fxt-1150-bhp","title":"IAG 1150 High Compression 2.5L Subaru Closed Deck Short Block For WRX, STI, LGT, FXT - 1150 BHP","description":"\u003ch2 style=\"text-align:center;\"\u003eIAG 1150 HIGH COMPRESSION 2.5L SUBARU CLOSED DECK SHORT BLOCK FOR WRX, STI, LGT, FXT - 1150 BHP\u003c\/h2\u003e\n\u003chr style=\"border:none;border-top:1px solid #e0e0e0;margin:24px 0;\"\u003e\n\u003cdiv class=\"video-embed\" style=\"position:relative;width:100%;padding-bottom:56.25%;height:0;overflow:hidden;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/BmOKcUt4M4U?start=0\u0026amp;end=0\u0026amp;autoplay=1\u0026amp;loop=1\u0026amp;mute=1\u0026amp;playlist=BmOKcUt4M4U\u0026amp;version=3\u0026amp;rel=0\" allowfullscreen loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003chr style=\"border:none;border-top:1px solid #e0e0e0;margin:24px 0;\"\u003e\n\u003cimg alt=\"IAG 1150 High Compression Subaru 2.5L Short Block For WRX STI\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/051019c6-0c26-4e23-9824-2687cc79d5e4\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eTHE IAG 1150 HIGH COMPRESSION SHORT BLOCK\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eBuilt for high-octane fuels such as E85 and race gas, the IAG 1150 High Compression 2.5L Closed Deck Short Block is the ideal choice for high-horsepower drag racing scenarios. While suitable for street use, it’s built to dominate the track. Compared to our regular 1150 Short Block pistons with compression ratios of 8.5:1 (D Heads, EJ255) and 8.2:1 (B, V, and W Heads, EJ257), the IAG High Compression 1150 steps it up to 9.9:1 on D Heads and 9.5:1 on B, V, and W Heads, unlocking more power and efficiency needed for race applications.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"IAG Spec Subaru EJ Tri-Beam +2mm Connecting Rods\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/8bdbcdf6-233c-4bf1-9695-255b2f73fec1\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eBUILT FOR SPEED AND POWER\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThis high compression Subaru block includes additional features to further strengthen the OEM case halves including Stage 4 Closed Decking and pinned mains secured with ARP case hardware. Our record-setting \"Fire-Lock\" Head Gasket system and 14mm head studs are used to ensure a tight seal even in extreme conditions. In addition, this short block also features IAG Spec \"Tri-Beam\" +2mm forged connecting rods. An IAG Spec Billet Crankshaft is used to support additional oiling and prevent main bearing distortion. The upgraded block, billet crank, connecting rods, race bearings, and forged pistons are able to support additional engine load produced by the largest turbochargers and the most demanding uses including competition drag racing.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"IAG Spec Billet Subaru EJ Crankshaft\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/32005ba9-3457-4ab6-b2e4-336d667cff41\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eBUILT WITH 100% NEW COMPONENTS\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eEvery IAG Short Block is built with 100% new components. The modified case halves are assembled using an IAG-Spec Billet crankshaft that is matched to ACL or King race main bearings. Custom IAG TRI-BEAM +2mm connecting rods with ARP 625+ rod bolts are utilized, along with ACL or King race rod bearings. The case halves are sealed with OEM sealant and ARP main bolts. The IAG-Spec 99.75mm Custom Forged Pistons with .250\" wall \/ .927\" diameter wrist pins as well as electroless nickel plated tops and ring area are chosen to finish the IAG 1150 High Compression Short Block.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"IAG Fire-Lock Head Gasket System for Subaru\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/0be5c15b-1d60-476d-88b2-12eeadb7fdf6\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eIAG CLOSED DECK WITH FIRE-LOCK SYSTEM\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe IAG 1150 High Compression Short Block starts with brand new Subaru 2.5L EJ25 engine case halves. The case halves are split and the main webs are CNC machined in our Haas VF-4SS CNC mill for 9.5mm pins to reduce distortion and movement of the case in extreme conditions. The case halves are then reassembled and IAG machines the case to accept the IAG CLOSED Deck Inserts that transform the block into a solid deck. The unique inserts feature small passages that allow needed coolant flow to the deck surface. The case halves are then CNC machined for our new Fire-Lock head gasket solution that is loosely derived from diesel technology where a counterbore step is machined around each cylinder bore allowing specially sized fire rings to drop into the machined area and head gasket bores. The IAG 1150 case is CNC drilled and tapped to fit 14mm head studs. Utilizing the new Fire-Lock gasket solution, along with larger IAG \/ ARP 14mm head studs, nuts, and washers reduce the chances of the heads lifting under extreme boost conditions. The short block is then Deck Plate bored and honed to 99.75mm in our in-house Sunnen SV-30 cylinder hone. IAG's in-house honing process is able to set custom piston to wall clearances to ensure performance and reliability. \u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"IAG 1150 High Compression Subaru EJ WRX STI Pistons\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/433a459e-d1f3-40ed-8edc-70b188fc2a70\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eSTRONG \u0026amp; LIGHT DESIGN\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe IAG 1150 High Compression Short Block uses our IAG-Spec 99.75mm Custom Forged Pistons with .250\" wall \/ .927\" diameter wrist pins feature electroless nickel plated tops and ring area. IAG's custom pistons feature a lightweight design while increasing strength where you need it and are designed to work exclusively with the IAG +2mm Tri-Beam connecting rods. The wrist pin is short and is made from strong H13 tool steel. The pin piers are profiled to increase pin boss strength. Finally, IAG's pistons feature added gas ports that aid ring sealing in high boost conditions. \u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"IAG 1150 High Compression Piston Close-Up\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/6103af5d-d593-4187-b7b0-57d235e7c5d9\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eIAG HIGH COMPRESSION PISTONS\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe IAG 1150 High Compression Short Block includes all the premium components of our 1150 short block, upgraded with custom high compression pistons. These pistons increase the compression ratio by reducing the pistons negative cc volume, and changing from a “dish” to a “flat top” style piston, making them ideal for racing applications where power and efficiency matter most. To ensure optimal performance, this short block requires consistent use of high-octane fuels like E85 or race gas. Pump gas is suitable only during the break-in process. \u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eNEED HELP CHOOSING A BLOCK?\u003c\/h2\u003e\n\u003cdiv class=\"video-embed\" style=\"position:relative;width:100%;padding-bottom:56.25%;height:0;overflow:hidden;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/AMytJ0EHOZo?start=0\u0026amp;end=0\u0026amp;autoplay=0\u0026amp;loop=0\u0026amp;rel=1\" allowfullscreen loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eWe made this video to highlight the differences between each of our short blocks and to help you choose the best one for your performance goals and budget. Our Build Advisors and Customer Support staff can also assist you with any questions or concerns. Just click the button below for assistance.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"CEI\" loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/Unknown-378.png\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eQUALITY GUARANTEED\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eWe stand behind every hand-built engine we produce. IAG's Standard Short Block Workmanship Warranty covers your short block for 12 months or 12,000 miles. We have also teamed up with a selection of IAG Certified Installation Facilities which offer up to a 24 month\/24,000 mile workmanship warranty when the engine is purchased, installed, and tuned by that IAG Certified Installer.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003ePOWER RATING\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003ePower:The IAG 1150 Short Block has a power output rating of 1150 BHP\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eHARDWARE \/ SEAL OPTION\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eNot planning on reusing your original short block service plugs and covers? IAG offers a simple comprehensive cover and seal kit that includes (1) Rear main seal, (3) OEM wrist pin plugs, (3) OEM wrist pin plug washers, (1) OEM separator cover, (6) OEM separator cover bolts, (1) OEM wrist pin service cover, (1) OEM wrist pin service cover O-ring and (2) OEM wrist pin service cover screws. *If you are reusing your original wrist pin service plugs and covers always replace the (3) OEM wrist pin plug washers and (1) wrist pin service cover O-ring before installing a short block to avoid potential leaks. *Never reuse a rear main seal on a new short block.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eHEAD GASKET OPTION\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\n\u003cp\u003eAfter years of research and development testing, the IAG Performance Fire-Lock head gasket is the newest solution to preventing head gasket failure on high horsepower and high boost Subaru EJ25 engines. This solution is loosely derived from diesel technology where a counterbore step is machined around each cylinder bore allowing specially sized fire rings to drop into the machined area and head gasket bores. The shims are designed to create a compression seal once the heads are installed and torqued into place. IAG fire rings are manufactured to a very strict tolerance from a proprietary alloy and are then put through a heat treatment process. The gaskets are manufactured from an asbestos-free composite raw material and feature a silicone based beading applied to critical areas to improve sealing around all water and oil passages. The combination of the alloy compression shims and gaskets assure maximum sealing for a Subaru EJ25 turbocharged engine.*The IAG Fire-Lock gaskets require machine work for installation and are recommended for use with 14mm head stud hardware.*The gaskets are sold in pairs with four Fire-Lock rings.Features:\u003c\/p\u003e\n\u003cp\u003eInstall Notes:1. If a block or cylinder head was previously o-ringed the groove must be filled and resurfaced before using this type of gasket.2. These gaskets require IAG ARP 14mm head studs to achieve the required torque necessary for proper installation.3. Due to the required torque, any block that was previously honed will need to go to the next size overbore.4. Future servicing will require cylinder head resurfacing due to an imprint left from the Fire-Lock rings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eOIL PICKUP \/ OIL BAFFLE \/ WINDAGE TRAY OPTIONS\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe IAG Performance Subaru WRX \/ STI oil pickup was designed by Tigwerks to replace the OEM EJ25 oil pickup, which is prone to failure. It's a well-known fact that the OEM oil pickups often crack and fail which, in most cases, destroys your engine from lack of oil pressure. To avoid the cracking failures seen in the OEM oil pickup tubes, the Tigwerks oil pickup is manufactured from heavy-gauge steel tubing that is 3x thicker than OEM. Additionally, it features a flange machined from 3\/8\"  1018 CR steel to mate with the block, sealed with a Viton O-ring. The integrated heavy-duty mounting bracket uses two mounting points rather than the OEM single mounting point. Furthermore, the oil pickup features a formed bottom with an OEM style mesh screen for proper filtration. The TIG-welded oil pickup's increased material thickness, matched with the two-point heavy-duty mounting bracket, helps ensure that it does not fatigue and fail over time like an OEM unit.The IAG Oil Control Baffle and Windage Tray System is designed to limit potential blow-by and prevent oil starvation in your Subaru's WRX \/ STI EJ engine during high rpm and high g-force driving. Through the use of Viton one-way flapper valves on our baffle and louvers in our windage tray, oil is prevented from reentering the upper crankcase area and is directed down into the oil pan to ensure plentiful supply to the oil pickup. IAG's integrated two-piece Oil Control Baffle and Windage Tray System is designed to work with our own oil pickup, as well as other oil pickups*. The baffle fits neatly in the engine crankcase area, allowing normal installation of the OEM oil pan and popular aftermarket pans*.Oil Pickup \u0026amp; Baffle Install Notes\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eOIL PUMP OPTION\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\n\u003cp\u003eThe 11mm Subaru Oil pump is one of the most popular off the shelf pumps to use on EJ25 engines. Originally equipped on the 2008-21 STI Dual AVCS engines, it provides an adequate amount of pressure and flow that fits the needs of many OE and built engines. But, as with almost anything, there is room for improvement.\u003c\/p\u003e\n\u003cp\u003eIncreasing oil flow volume and pressure in an EJ25 ensures that the bearings have sufficient oil film under all power levels and driving conditions. Additional oil flow to the engine provides a greater oil reserve to operate the AVCS solenoids and cam gears - giving you more consistent performance results.\u003c\/p\u003e\n\u003cp\u003eThe IAG Stage 2 CNC Ported 11mm oil pump was developed over years of servicing street and racing engines. In that time IAG has tested and utilized the majority of the popular Subaru oil pumps available on the market (JDM, Cosworth, ACL etc.) for customer, personal and racing vehicles.\u003c\/p\u003e\n\u003cp\u003eOver the last few years if you wanted an upgraded oil pump over the stock 11mm you would either buy a hand ported model from a trusted source, or often an OEM JDM (Japanese Market) 12mm pump. We believe that we have developed a better alternative. The IAG Stage 2 CNC Ported 11mm oil pumps have shown through lab testing on a Spintron Machine that it will outperform a JDM 12mm.\u003c\/p\u003e\n\u003cp\u003eThe Stage 2 Oil pump is a cost effective solution that outperforms the market standards. This pump has been extensively tested on street cars, track cars, and on our in-house Spintron to ensure consistent and repeatable performance.\u003c\/p\u003e\n\u003cp\u003eEach IAG Stage 2 oil pump starts life as an OEM spec 11mm oil pump, straight from Subaru. IAG completely disassembles the new oil pump including pulling the rotors, backing plate \u0026amp; pressure relief valve. Next, the main body is fixtured in our in-house 5-Axis Centroid CNC machine where the inlet and outlet passageways are CNC ported. This allows for a larger, more consistent pathway for the oil into and out of the gerotor internals and helps to prevent cavitation. The Oil Pump Outlet where it meets the engine block is also CNC “Port Matched”, for a perfect transition into the engine block. The Inlet and Outlet sides of the gerotor are also opened up on the CNC mill to reduce inlet side cavitation, and to reduce outlet side pressure drops.\u003c\/p\u003e\n\u003cp\u003eThe pressure relief valve piston is REM Polished, which provides a non-directional, low Ra, polished finish. This reduces friction, heat and possibility of the relief valve piston galling and sticking, a common failure point on the OEM pumps.\u003c\/p\u003e\n\u003cp\u003eThe piston is reinstalled and confirmed to operate correctly. The rotors are measured and checked to be within the manufacturer's specification - aka Blueprinted, and installed next. The pump is then put together with a light coating of assembly lube to reduce friction and scuffing and aid in priming on first start up.\u003c\/p\u003e\n\u003cp\u003eFinally, the backing plate is installed. Loctite is added to the hardware, and each piece receives a painted mark after it is correctly torqued. The pump ships ready to install, with all hardware and seals required for installation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"IAG Performance","offers":[{"title":"Default Title","offer_id":48066713518298,"sku":"IAG-ENG-S115H","price":9499.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/IAG-ENG-S115H-01__03737.1738163107.1280.1280.jpg?v=1781533638"},{"product_id":"iag-1150-2-5l-subaru-closed-deck-short-block-for-wrx-sti-lgt-fxt-1150-bhp","title":"IAG 1150 2.5L Subaru Closed Deck Short Block For WRX, STI, LGT, FXT - 1150 BHP","description":"\u003ch2 style=\"text-align:center;\"\u003eIAG 1150 EJ25 2.5L SUBARU SHORT BLOCK\u003c\/h2\u003e\n\u003chr style=\"border:none;border-top:1px solid #e0e0e0;margin:24px 0;\"\u003e\n\u003cdiv class=\"video-embed\" style=\"position:relative;width:100%;padding-bottom:56.25%;height:0;overflow:hidden;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/BmOKcUt4M4U?start=0\u0026amp;end=0\u0026amp;autoplay=1\u0026amp;loop=1\u0026amp;mute=1\u0026amp;playlist=BmOKcUt4M4U\u0026amp;version=3\u0026amp;rel=0\" allowfullscreen loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003chr style=\"border:none;border-top:1px solid #e0e0e0;margin:24px 0;\"\u003e\n\u003cimg alt=\"IAG 1150 Short Block Tri Beam Connecting Rods\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/3a7b2793-fb4e-4a5a-bf90-3f34dfadf005\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eBUILT TO WITHSTAND HIGH HORSEPOWER DRAG RACING\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe IAG 1150 Short Block is designed for those who plan to drag race their high horsepower Subarus regularly. While still a streetable block, the IAG 1150 is designed for the track. This block includes additional features to further strengthen the OEM case halves including Stage 4 Closed Decking and pinned mains secured with ARP case hardware. Our record-setting \"Fire-Lock\" Head Gasket system and 14mm head studs are used to ensure a tight seal even in extreme conditions. The IAG 1150 Short Block features IAG Spec \"Tri-Beam\" +2mm forged connecting rods. An IAG Spec Billet Crankshaft is used to support additional oiling and prevent main bearing distortion. The upgraded block, billet crank, connecting rods, race bearings, and forged pistons are able to support additional engine load produced by the largest turbochargers and the most demanding uses including competition drag racing. \u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"IAG 1150 Short Block During Assembly\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/bea9ca1b-be1e-49dd-adaa-59e7530a99c1\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eBUILT WITH 100% NEW COMPONENTS\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eEvery IAG Short Block is built with 100% new components. The modified case halves are assembled using an IAG-Spec Billet crankshaft that is matched to ACL or King race main bearings. Custom IAG TRI-BEAM +2mm connecting rods with ARP 625+ rod bolts are utilized, along with ACL or King race rod bearings. The case halves are sealed with OEM sealant and ARP main bolts. The IAG-Spec 99.75mm Custom Forged Pistons with .250\" \/ .927\" wrist pins as well as electroless nickel plated tops and ring area are chosen to finish the IAG 1150 Short Block.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"IAG Short Block with Fire-Lock Gaskets\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/0fb9d8c8-2ab8-4205-8217-e5c10c475a51\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eIAG 1150 CLOSED DECK WITH FIRE-LOCK SYSTEM\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe IAG 1150 Short Block starts with brand new Subaru 2.5L EJ25 engine case halves. The case halves are split and the main webs are CNC machined in our Haas VF-4SS CNC mill for 9.5mm pins to reduce distortion and movement of the case in extreme conditions. The case halves are then reassembled and IAG machines the case to accept the IAG CLOSED Deck Inserts that transform the block into a solid deck. The unique inserts feature small passages that allow needed coolant flow to the deck surface. The case halves are then CNC machined for our new Fire-Lock head gasket solution that is loosely derived from diesel technology where a counterbore step is machined around each cylinder bore allowing specially sized fire rings to drop into the machined area and head gasket bores. The IAG 1150 case is CNC drilled and tapped to fit 14mm head studs. Utilizing the new Fire-Lock gasket solution, along with larger IAG \/ ARP 14mm head studs, nuts, and washers reduce the chances of the heads lifting under extreme boost conditions. The short block is then Deck Plate bored and honed to 99.75mm in our in-house Sunnen SV-30 cylinder hone. IAG's in-house honing process is able to set custom piston to wall clearances to ensure performance and reliability.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"IAG 1150 Short Block JE Pistons\" loading=\"lazy\" src=\"https:\/\/i.shgcdn.com\/3dcb0072-5269-4497-b3c6-123a8e1138bd\/-\/format\/auto\/-\/preview\/3000x3000\/-\/quality\/lighter\/\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eOUR STRONGEST PISTONS EVER\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe IAG 1150 Short Block uses our strongest pistons ever - The IAG-Spec 99.75mm Custom Forged Pistons with .250\" \/ .927\" wrist pins feature electroless nickel plated tops and ring area. IAG's custom pistons feature a lightweight design while increasing strength where you need it and are designed to work exclusively with the IAG +2mm Tri-Beam connecting rods. The wrist pin is short and is made from strong H13 tool steel. The pin piers are profiled to increase pin boss strength. Finally, IAG's pistons feature added gas ports that aid ring sealing in high boost conditions.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eNEED HELP CHOOSING A BLOCK?\u003c\/h2\u003e\n\u003cdiv class=\"video-embed\" style=\"position:relative;width:100%;padding-bottom:56.25%;height:0;overflow:hidden;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/AMytJ0EHOZo?start=0\u0026amp;end=0\u0026amp;autoplay=0\u0026amp;loop=0\u0026amp;rel=1\" allowfullscreen loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eWe made this video to highlight the differences between each of our short blocks and to help you choose the best one for your performance goals and budget. Our Build Advisors and Customer Support staff can also assist you with any questions or concerns. Just click the button below for assistance.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg alt=\"CEI\" loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/Unknown-378.png\" style=\"display:block;margin:0 auto;\"\u003e\n\u003ch2 style=\"text-align:center;\"\u003eQUALITY GUARANTEED\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eWe stand behind every hand-built engine we produce. IAG's Standard Short Block Workmanship Warranty covers your short block for 12 months or 12,000 miles. We have also teamed up with a selection of IAG Certified Installation Facilities which offer up to a 24 month\/24,000 mile workmanship warranty when the engine is purchased, installed, and tuned by that IAG Certified Installer.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003ePOWER RATING\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003ePower:The IAG 1150 Short Block has a power output rating of 1150 BHP\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eHARDWARE \/ SEAL OPTION\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eNot planning on reusing your original short block service plugs and covers? IAG offers a simple comprehensive cover and seal kit that includes (1) Rear main seal, (3) OEM wrist pin plugs, (3) OEM wrist pin plug washers, (1) OEM separator cover, (6) OEM separator cover bolts, (1) OEM wrist pin service cover, (1) OEM wrist pin service cover O-ring and (2) OEM wrist pin service cover screws. *If you are reusing your original wrist pin service plugs and covers always replace the (3) OEM wrist pin plug washers and (1) wrist pin service cover O-ring before installing a short block to avoid potential leaks. *Never reuse a rear main seal on a new short block.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eHEAD GASKET OPTION\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\n\u003cp\u003eAfter years of research and development testing, the IAG Performance Fire-Lock head gasket is the newest solution to preventing head gasket failure on high horsepower and high boost Subaru EJ25 engines. This solution is loosely derived from diesel technology where a counterbore step is machined around each cylinder bore allowing specially sized fire rings to drop into the machined area and head gasket bores. The shims are designed to create a compression seal once the heads are installed and torqued into place. IAG fire rings are manufactured to a very strict tolerance from a proprietary alloy and are then put through a heat treatment process. The gaskets are manufactured from an asbestos-free composite raw material and feature a silicone based beading applied to critical areas to improve sealing around all water and oil passages. The combination of the alloy compression shims and gaskets assure maximum sealing for a Subaru EJ25 turbocharged engine.*The IAG Fire-Lock gaskets require machine work for installation and are recommended for use with 14mm head stud hardware.*The gaskets are sold in pairs with four Fire-Lock rings.Features:\u003c\/p\u003e\n\u003cp\u003eInstall Notes:1. If a block or cylinder head was previously o-ringed the groove must be filled and resurfaced before using this type of gasket.2. These gaskets require IAG ARP 14mm head studs to achieve the required torque necessary for proper installation.3. Due to the required torque, any block that was previously honed will need to go to the next size overbore.4. Future servicing will require cylinder head resurfacing due to an imprint left from the Fire-Lock rings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eOIL PICKUP \/ OIL BAFFLE \/ WINDAGE TRAY OPTIONS\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\u003cp\u003eThe IAG Performance Subaru WRX \/ STI oil pickup was designed by Tigwerks to replace the OEM EJ25 oil pickup, which is prone to failure. It's a well-known fact that the OEM oil pickups often crack and fail which, in most cases, destroys your engine from lack of oil pressure. To avoid the cracking failures seen in the OEM oil pickup tubes, the Tigwerks oil pickup is manufactured from heavy-gauge steel tubing that is 3x thicker than OEM. Additionally, it features a flange machined from 3\/8\"  1018 CR steel to mate with the block, sealed with a Viton O-ring. The integrated heavy-duty mounting bracket uses two mounting points rather than the OEM single mounting point. Furthermore, the oil pickup features a formed bottom with an OEM style mesh screen for proper filtration. The TIG-welded oil pickup's increased material thickness, matched with the two-point heavy-duty mounting bracket, helps ensure that it does not fatigue and fail over time like an OEM unit.The IAG Oil Control Baffle and Windage Tray System is designed to limit potential blow-by and prevent oil starvation in your Subaru's WRX \/ STI EJ engine during high rpm and high g-force driving. Through the use of Viton one-way flapper valves on our baffle and louvers in our windage tray, oil is prevented from reentering the upper crankcase area and is directed down into the oil pan to ensure plentiful supply to the oil pickup. IAG's integrated two-piece Oil Control Baffle and Windage Tray System is designed to work with our own oil pickup, as well as other oil pickups*. The baffle fits neatly in the engine crankcase area, allowing normal installation of the OEM oil pan and popular aftermarket pans*.Oil Pickup \u0026amp; Baffle Install Notes\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align:center;\"\u003eOIL PUMP OPTION\u003c\/h2\u003e\n\u003cdiv class=\"product-text\"\u003e\n\u003cp\u003eThe 11mm Subaru Oil pump is one of the most popular off the shelf pumps to use on EJ25 engines. Originally equipped on the 2008-21 STI Dual AVCS engines, it provides an adequate amount of pressure and flow that fits the needs of many OE and built engines. But, as with almost anything, there is room for improvement.\u003c\/p\u003e\n\u003cp\u003eIncreasing oil flow volume and pressure in an EJ25 ensures that the bearings have sufficient oil film under all power levels and driving conditions. Additional oil flow to the engine provides a greater oil reserve to operate the AVCS solenoids and cam gears - giving you more consistent performance results.\u003c\/p\u003e\n\u003cp\u003eThe IAG Stage 2 CNC Ported 11mm oil pump was developed over years of servicing street and racing engines. In that time IAG has tested and utilized the majority of the popular Subaru oil pumps available on the market (JDM, Cosworth, ACL etc.) for customer, personal and racing vehicles.\u003c\/p\u003e\n\u003cp\u003eOver the last few years if you wanted an upgraded oil pump over the stock 11mm you would either buy a hand ported model from a trusted source, or often an OEM JDM (Japanese Market) 12mm pump. We believe that we have developed a better alternative. The IAG Stage 2 CNC Ported 11mm oil pumps have shown through lab testing on a Spintron Machine that it will outperform a JDM 12mm.\u003c\/p\u003e\n\u003cp\u003eThe Stage 2 Oil pump is a cost effective solution that outperforms the market standards. This pump has been extensively tested on street cars, track cars, and on our in-house Spintron to ensure consistent and repeatable performance.\u003c\/p\u003e\n\u003cp\u003eEach IAG Stage 2 oil pump starts life as an OEM spec 11mm oil pump, straight from Subaru. IAG completely disassembles the new oil pump including pulling the rotors, backing plate \u0026amp; pressure relief valve. Next, the main body is fixtured in our in-house 5-Axis Centroid CNC machine where the inlet and outlet passageways are CNC ported. This allows for a larger, more consistent pathway for the oil into and out of the gerotor internals and helps to prevent cavitation. The Oil Pump Outlet where it meets the engine block is also CNC “Port Matched”, for a perfect transition into the engine block. The Inlet and Outlet sides of the gerotor are also opened up on the CNC mill to reduce inlet side cavitation, and to reduce outlet side pressure drops.\u003c\/p\u003e\n\u003cp\u003eThe pressure relief valve piston is REM Polished, which provides a non-directional, low Ra, polished finish. This reduces friction, heat and possibility of the relief valve piston galling and sticking, a common failure point on the OEM pumps.\u003c\/p\u003e\n\u003cp\u003eThe piston is reinstalled and confirmed to operate correctly. The rotors are measured and checked to be within the manufacturer's specification - aka Blueprinted, and installed next. The pump is then put together with a light coating of assembly lube to reduce friction and scuffing and aid in priming on first start up.\u003c\/p\u003e\n\u003cp\u003eFinally, the backing plate is installed. Loctite is added to the hardware, and each piece receives a painted mark after it is correctly torqued. The pump ships ready to install, with all hardware and seals required for installation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"IAG Performance","offers":[{"title":"Default Title","offer_id":48066713354458,"sku":"IAG-ENG-S115","price":9499.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/api7z1jmj__87477.1633558498.1280.1280__67141.1698680610.1280.1280.jpg?v=1781533638"}],"url":"https:\/\/www.iagperformance.com\/collections\/engine-engine-builds-short-blocks-internals-ej25-short-blocks.oembed","provider":"IAG Performance","version":"1.0","type":"link"}