IAG Stage 2 2.5L Subaru Short Block for WRX, STI, Legacy GT, Forester XT

IAG Stage 2 2.5L Subaru Short Block for Subaru WRX, STI, Forester XT and Legacy GT
IAG Stage 2 EJ257 2.5L Built Subaru Short Block

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MSRP: $3,359.99
Our Price: $3,199.99
Savings: $160.00

Availability: Usually Ships in 2 to 3 Weeks
Part#: IAG-ENG-1200

Seal Kit*:
Wrist Pin / Cover Seals P# IAG-ENG-1720 [Add $105.99]
Not Required

Description Warranty Information Applications

IAG Stage 2 Short Block

The IAG Stage 2 Short Block is designed for modified EJ25 Subaru's that need a beefed-up performance short block. The IAG Stage 2 short block builds off the Stage 1's strengths by adding ACL Race bearings and IAG Spec H-Beam forged connecting rods. The upgraded rods and bearings are able to support additional engine load produced by larger turbochargers that the OEM STI rods cannot support reliably. Each IAG Stage 2 Short Block starts with new Subaru 2.5L 99.5mm stock bore EJ25 engine case halves as standard. The short block is measured and assembled using a new 2017+ Subaru 2.5L nitride treated STI crankshaft that is matched to ACL or King race main bearings. IAG-Spec H-Beam rods and ARP2000 rod bolts are utilized along with ACL or King race rod bearings. The case halves are sealed with new OEM main case bolts and sealant. Finally, Manley 99.5mm Platinum Series Forged Pistons are spec'd and installed finishing off the short block.

The IAG Stage 2 Short Block has a power output rating of 650BHP.

Stage 2 Short Block Includes:
  • Case Halves - Brand new Subaru OEM case halves 99.5mm stock bore
  • Pistons - Manley 99.5mm Platinum Forged Pistons, Ringset, .210" Steel Pins, Clips, (Coated Skirts and Offset Wrist Pin)
  • Connecting Rods - IAG-Spec H-Beam Rods with ARP2000 rod bolts
  • Rod / Main Bearings - ACL or King Race Bearings
  • Crankshaft - Standard New Subaru Nitride Treated 2017+ STI Crankshaft
  • Case / Main Bolts - Standard FHI Subaru case bolts

Additional Options Available:
Hardware / Seals - OEM cover and seal kit - $105.99

*All IAG Short Blocks are balanced and blueprinted.

Compression Ratio: 8.5:1 on D Cylinder Heads (EJ255)
Compression Ratio: 8.2:1 on B, V and W EJ257 Heads with standard thickness gasket.

Hardware / Seal Option:

Not 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.

Please review the PDF document below regarding installation, break-in procedures and warranty information.

PDF After Sale Document - Contains Shipping, Engine Care and Warranty Information

Average Rating: 5 of 5 Total Reviews: 9 Write a review »

  0 of 0 people found the following review helpful:
Great Customer Service September 5, 2017
Reviewer: Hayden Huff from Butler, PA United States  
I emailed back and forth with Rick from IAG and he was a great help. Recieved the block and very happy with it. Can't wait to install it!

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  0 of 0 people found the following review helpful:
5 stars January 31, 2017
Reviewer: bryce emmett from Tacoma, WA United States  
Excellent service.  Good communication.  And prompt shipping.  Thank you

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  1 of 1 people found the following review helpful:
IAG Stg 2 Short Block - A+ Shipping! December 16, 2016
Reviewer: Austin Sierra from San Antonio, TX United States  
Finally have about 7k miles on my IAG Stg 2 shortblock and can say this is one quality short block and comes shipped in a sturdy pelican case to keep it safe. Only thing I can notice is some piston slap on warm up but it goes away. Tuned by AWDTuning at 310hp. 07 WRX

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  0 of 0 people found the following review helpful:
Iag short block December 16, 2016
Reviewer: Lillian Martinez from marrero, LA United States  
Far by the best customer service and fast shipping , also great prices i will continue to shop with iag performance

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  0 of 0 people found the following review helpful:
Just fantastic! November 30, 2016
Reviewer: Will from Arizona  
Where to start: The shipping was quick and very well done, the blocks comes in a very protective military grade pelican case, sealed and wrapped in plastic, which is fantastic. However whats even better, is the people. Kieth was very helpful in answering all my questions and even troubleshooting an issue the installer encountered. The block is quite, and feels great. I will update after the break-in period is over and I really get a chance to drive it. 10/10.

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