{"title":"Cylinder Heads \u0026 Parts","description":"\u003cp\u003eShop Subaru cylinder heads and valvetrain components at IAG Performance for 2002–2023 Subaru WRX, STI, Legacy GT, Forester XT, and BRZ models. Our selection includes high-quality Subaru cylinder head parts designed for EJ20, EJ25, and FA20 engines, whether you're performing routine maintenance, upgrading valvetrain components, or building a high-performance Subaru engine. Browse a wide range of Subaru cylinder head upgrades and replacement parts including ported head packages, camshafts, cam sprockets, valves, valve springs, retainers, valve guides, gaskets, seals, timing chains, head hardware, and other essential valvetrain components. These parts are engineered to support everything from reliable daily driving to high-horsepower Subaru WRX and STI engine builds. IAG Performance carries cylinder head parts and valvetrain components from many of the most trusted names in the Subaru performance community. Featured brands include AEM, Brian Crower, GSC Power Division, IAG Performance, JE Pro Seal, Kelford Cams, Killer B Motorsport, Manley Performance, Subaru OEM, Turnin Concepts, and more. Whether you're refreshing your Subaru cylinder heads or building a fully upgraded EJ or FA engine, IAG Performance offers the parts and expertise to support your Subaru WRX, STI, Legacy GT, Forester XT, or BRZ build.\u003c\/p\u003e","products":[{"product_id":"subaru-driver-side-exhaust-cam-gear-sprocket-for-2002-14-wrx-04-07-sti-05-09-lgt-04-08-fxt","title":"Subaru Driver Side Exhaust Cam Gear Sprocket for 2002-14 WRX, 04-07 STI, 05-09 LGT, 04-08 FXT","description":"\u003cp\u003eThe driver side Subaru exhaust cam gear sprocket is manufactured from a plastic that can be damaged in accidents, tensioner failures and during timing belt replacements when the hardware that secures it is frozen in place. 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(Silver Finish)\u003c\/p\u003e","brand":"IAG Performance","offers":[{"title":"Default Title","offer_id":48062302945498,"sku":"IAG-ENG-2000SL","price":65.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apig69l00__06574.1633558509.1280.1280.jpg?v=1781529580"},{"product_id":"kelford-cams-256-264-street-rally-cam-shafts-for-2002-05-subaru-wrx-non-avcs-ej20-engines","title":"Kelford Cams 256 \/ 264 Street \u0026 Rally Cam Shafts For 2002-05 Subaru WRX Non AVCS EJ20 Engines","description":"\u003cp\u003eKelford Cams make the best high performance Subaru camshafts available. Manufactured in-house using an ultra modern design system and ground using masterless CNC grinders with CBN cutting wheel technology for superior quality and consistency. The Kelford 199-B Street \/ Rally cam shafts suit the 2002-05 2.0L Turbo engines that do not have AVCS. These cams feature a 256\/264 Duration, 9.55mm\/9.60mm Lift and is ideal for use in the 36mm restrictor rally car engines.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eCam Lift: Intake = 9.55mm , Exhaust = 9.60mm\u003cbr\u003eRocker Ratio: Intake = 1 , Exhaust = 1\u003cbr\u003eNet Valve Lift: Intake = 9.35mm , Exhaust = 9.35mm\u003cbr\u003eAdvertised Duration @ .25mm: Intake = 256 , Exhaust = 264\u003cbr\u003eDuration @ 1.0mm Valve Lift: Intake = 218 , Exhaust = 222\u003cbr\u003eTiming @ 1.0mm Valve Lift: IVO = 1 ATDC , EVO = 43 BBDC , IVC = 39 ABDC , EVC = 1 BTDC\u003cbr\u003eSuggested Centerline: Intake = 110 ATDC, Exhaust =112 BTDC\u003cbr\u003eValve Lift @ TDC: Intake = 0.91mm , Exhaust = 0.92\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Kelford Cams","offers":[{"title":"Default Title","offer_id":48062304157914,"sku":"199-B","price":949.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apikal7ui__40895.1697549576.1280.1280.jpg?v=1781529578"},{"product_id":"kelford-cams-stage-1-264-260-street-rally-camshaft-set-for-2008-20-subaru-sti","title":"Kelford Cams Stage 1 264 \/ 260 Street \u0026 Rally Camshaft Set For 2008-21 Subaru STI","description":"\u003cp\u003eThe Subaru STI EJ257B engine features dual AVCS (Active Valve Control System). This feature enables the builder to extract massive power while retaining great low end driveability. The Kelford range of camshafts feature a very new camshaft design technology termed 'ICE'. This design technique results in a efficiency gain for these engines. No other aftermarket camshaft company offers this approach for the EJ25 engine platform. The Kelford Stage 1 220-B is a cam profile setup for the street and rally. The cams feature a 264 \/ 260 duration, 10.7mm \/ 10.20mm Lift. Suits up to 30lb boost and 8000 RPM with recommended valve springs\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eKelford Cams 220-B Street \/ Rally Cams\u003cbr\u003eCam Lift: Intake = 10.90mm , Exhaust = 10.45mm \u003cbr\u003eRocker Ratio: Intake = 1 , Exhaust = 1\u003cbr\u003eNet Valve Lift: Intake = 10.70mm , Exhaust = 10.20mm\u003cbr\u003eAdvertised Duration @ .25mm: Intake = 264 , Exhaust = 260\u003cbr\u003eDuration @ 1.0mm Valve Lift: Inlet = 225 , Exhaust = 222\u003cbr\u003eTiming @ 1.0mm Valve Lift: IVO = 17.5 ATDC , EVO = 57 BBDC , 62.5 ABDC , EVC = 15 BTDC\u003cbr\u003eSuggested Centerline: Intake = 130 ATDC , Exhaust =126 BTDC\u003cbr\u003eValve Lift @ TDC: Intake = 0.03mm , Exhaust = 0.07mm\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Kelford Cams","offers":[{"title":"Default Title","offer_id":48062304944346,"sku":"220-B","price":949.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apivzs7g7__54986.1697548983.1280.1280.jpg?v=1781529579"},{"product_id":"brian-crower-arp2000-cam-gear-bolt-set-4-fits-08-20-subaru-sti-dual-avcs","title":"Brian Crower ARP2000 Cam Gear Bolt Set (4) Fits 08-21 Subaru STI Dual AVCS","description":"\u003cp\u003eBC cam bolts for the EJ Series engine platforms are made from ARP2000 material and feature a silver CAD plated finish to eliminate corrosion from handling. Hardened to RC 45-47, the new BC cam bolts secure the cam gears permanently without the stretch common with OEM fasteners. Reduces the risk of the gear coming loose and causing severe engine damage. Works with all brands of camshafts and cam gears. The BC bolts feature OEM thread pitch and under head length. \u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSet Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e(x4) BC8899 Bolt AVCS Bolts 2008-21 STI (Dual AVCS EJ25)\u003cem\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/em\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e","brand":"Brian Crower","offers":[{"title":"Default Title","offer_id":48062303174874,"sku":"BC8899K4","price":152.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apix2uzoi__87270.1718975932.1280.1280.jpg?v=1781529580"},{"product_id":"right-side-intake-cam-sprocket-for-2015-18-subaru-wrx-fa20-dit","title":"Right Side Intake Cam Sprocket For 2015-21 Subaru WRX FA20 DIT, 17-20 BRZ","description":"\u003cp\u003eRight Side Intake Cam Sprocket For 2015-21 Subaru WRX FA20 DIT, 17-20 BRZ\u003c\/p\u003e","brand":"Subaru","offers":[{"title":"Default Title","offer_id":48062305075418,"sku":"13320AA071","price":308.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/api4uq2qm__36405.1686765638.1280.1280.jpg?v=1781529584"},{"product_id":"subaru-cam-gear-sprocket-bolt-fits-2002-05-wrx-intake-cams-all-non-avcs-exhaust-cams","title":"Subaru Cam Gear Sprocket Bolt Fits 2002-05 WRX Intake Cams \u0026 All Non-AVCS Exhaust Cams","description":"\u003cp\u003eThe Subaru cam bolt is often damaged during a timing belt service and requires replacement. 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GSC flow tested prototype valve heads in specific applications to make sure they produced the highest flowing valve head available on the market today. The materials used create less valve distortion at the face than any of the tested designs. Less distortion allows better sealing under extreme conditions and more consistent performance throughout the life of the valve. GSC Power-Division's new valves are sure to become the industries standard for sport compact performance valves. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e Valve Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSwirl polished 35mm heads for smoother airflow over the valve\u003c\/li\u003e\n\u003cli\u003eBack cut to reduce valve weight for higher rpm, higher boost pressure and allow for more aggressive cam profiles without increasing valve spring seat pressures.\u003c\/li\u003e\n\u003cli\u003eValve stems are micro-polished to allow for less oil retention on the stem which creates less drag on the stem to guide for a smoother motion.\u003c\/li\u003e\n\u003cli\u003eIntake valves are a modified 21-4n stainless\u003c\/li\u003e\n\u003cli\u003eValve tips are either hardened or have a stelite wafer tip fused so that the tip is within 5 Rockwell C of the rocker or valve tappet for extended life and less wear\u003c\/li\u003e\n\u003cli\u003eGSC spent extra time to adjust tip heights on the applications to require less tipping of the valve to maintain proper tip height for proper valvetrain geometry and to cut down on install times when setting valve lash.\u003c\/li\u003e\n\u003cli\u003eGSC adjusted the Keeper grove to properly balance intake spring pressures to reduce the use of valve spring shims and maximize performance from our spring and retainer kits.\u003c\/li\u003e\n\u003cli\u003eValves will work with an OEM keeper\/lock or when available our upgrade keeper\/lock. It's not mandatory but it is suggested that any valve lock not be reused on performance applications due to material grooving.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003eSpecs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOversize (35mm Head)\u003c\/li\u003e\n\u003cli\u003eSold as a set of 8\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003eFits:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2015-21 Subaru WRX\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":48062306844890,"sku":"GSC2284-8","price":172.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apiiei4rg__42170.1679493730.1280.1280.jpg?v=1781529592"},{"product_id":"iag-short-block-copper-o-ring-wire-install-tool-kit","title":"IAG Short Block Copper O-Ring Wire \u0026 Install Tool Kit","description":"\u003cbr\u003e\n\u003cbr\u003e\n\u003cb\u003e Includes:\u003c\/b\u003e\n\u003cbr\u003e\n\u003cul\u003e \u003cli\u003e(x1) Wooden Tool End\u003c\/li\u003e \u003cli\u003e(x4) 14.75\"-15\" Copper O-Ring Wires \u003c\/li\u003e \u003c\/ul\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cp\u003eDesigned to fit IAG EJ25 short blocks or case halves that received the o-ring option.\u003c\/p\u003e","brand":"IAG Performance","offers":[{"title":"Default Title","offer_id":48062305272026,"sku":"IAG-ENG-1750","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apihzshz3__56409.1633558561.1280.1280.jpg?v=1781529593"},{"product_id":"brian-crower-arp2000-cam-gear-bolt-set-4-fits-02-05-subaru-wrx-non-avcs","title":"Brian Crower ARP2000 Cam Gear Bolt Set (4) - Fits 02-05 Subaru WRX Non AVCS","description":"\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cb\u003eIncludes:\u003c\/b\u003e\n\u003cbr\u003e\n\u003cul\u003e\u003cli\u003e(x4) BC8898 Bolts For 2002-05 WRX (Non-AVCS EJ20) \u003c\/li\u003e\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e","brand":"Brian Crower","offers":[{"title":"Default Title","offer_id":48062306189530,"sku":"BC8898K4","price":140.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apiythtox__58244.1694464469.1280.1280.jpg?v=1781529592"},{"product_id":"gsc-s3-billet-camshaft-set-for-the-2008-21-subaru-sti-with-dual-avcs","title":"GSC S3 Billet Camshaft Set for the 2008-21 Subaru STI with Dual AVCS","description":"\u003cp\u003eGSC Power-Division Billet S3 Camshafts for the 2008-21 Subaru STI EJ257 with Dual AVCS are built to suit high horsepower drag Subaru's. With a power range of 750-1000 WHP and a rev range of 4500-9500 RPMs, you need certain mods to utilize the true potential of the S3s: built motor, with a built\/ported head (clearance for lift), and an engine management solution. Upgraded valve springs are required; GSC beehive valve springs are recommended but not required. \u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSpecs:\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"80%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e 7026S3\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e ADV Duration \u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e Duration @ 0.040\" \u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e Peak Lift \u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e Center Line \u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e Intake \u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e280°\u003c\/td\u003e\n\u003ctd\u003e240°\u003c\/td\u003e\n\u003ctd\u003e11.55mm\u003c\/td\u003e\n\u003ctd\u003e130°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e Exhaust \u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e280°\u003c\/td\u003e\n\u003ctd\u003e241°\u003c\/td\u003e\n\u003ctd\u003e11.60mm\u003c\/td\u003e\n\u003ctd\u003e128°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003eGSC Install Recommendations:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCheck Pictures for cam placement. Long nose = Left Side, short nose = Right Side\u003c\/li\u003e\n\u003cli\u003eDue to the lobe size, head castings will need to be filed down slightly for clearance - Please check during install\u003c\/li\u003e\n\u003cli\u003eProper break in and running high zinc oil is a must on flat tappet engines\u003c\/li\u003e\n\u003cli\u003eMust be installed by an experienced technician\u003c\/li\u003e\n\u003cli\u003eCheck AVCS advance during install - must be done by experienced engine builder\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":48062306713818,"sku":"GSC7026S3","price":1058.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/api5ebuhh__11397.1679493117.1280.1280.jpg?v=1781529593"},{"product_id":"gsc-s2-billet-camshaft-set-for-the-02-05-wrx-ej20-non-avcs","title":"GSC S2 Billet Camshaft Set for the 02-05 WRX EJ20 (Non AVCS)","description":"\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cb\u003eSpecs:\u003c\/b\u003e\n\u003cbr\u003e\n\u003ctable padding=\"2px\" width=\"80%\"\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e \u003cb\u003e 7020S2\u003c\/b\u003e \u003c\/td\u003e \u003ctd\u003e \u003cb\u003eADV Duration\u003c\/b\u003e \u003c\/td\u003e \u003ctd\u003e \u003cb\u003eDuration @ 0.040\"\u003c\/b\u003e \u003c\/td\u003e \u003ctd\u003e \u003cb\u003ePeak Lift\u003c\/b\u003e \u003c\/td\u003e \u003ctd\u003e \u003cb\u003eCenter Line\u003c\/b\u003e \u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e \u003cb\u003e Intake \u003c\/b\u003e \u003c\/td\u003e \u003ctd\u003e 272° \u003c\/td\u003e \u003ctd\u003e 234° \u003c\/td\u003e \u003ctd\u003e 10.25mm \u003c\/td\u003e \u003ctd\u003e 110° \u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e \u003cb\u003e Exhaust \u003c\/b\u003e \u003c\/td\u003e \u003ctd\u003e 272° \u003c\/td\u003e \u003ctd\u003e 234° \u003c\/td\u003e \u003ctd\u003e 10.25mm \u003c\/td\u003e \u003ctd\u003e 115° \u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cb\u003eGSC Recommendations:\u003c\/b\u003e\n\u003cbr\u003e\n\u003cul\u003e \u003cli\u003eCheck Pictures for cam placement. Long nose = Left Side, short nose = Right Side.\u003c\/li\u003e \u003cbr\u003e \u003c\/ul\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":48062307139802,"sku":"GSC7020S2","price":932.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apiq0vgiw__67829.1697553985.1280.1280.jpg?v=1781529594"},{"product_id":"gsc-s1-billet-camshaft-set-for-the-04-07-sti-06-14-wrx-04-13-fxt-05-12-lgt-with-intake-avcs","title":"GSC S1 Billet Camshaft Set for the 04-07 STI, 06-14 WRX, 04-13 FXT, 05-12 LGT with Intake AVCS","description":"\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cb\u003eSpecs:\u003c\/b\u003e\n\u003cbr\u003e\n\u003ctable padding=\"2px\" width=\"80%\"\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e \u003cb\u003e 7025S1 \u003c\/b\u003e \u003c\/td\u003e \u003ctd\u003e \u003cb\u003eADV Duration\u003c\/b\u003e \u003c\/td\u003e \u003ctd\u003e \u003cb\u003eDuration @ 0.040\"\u003c\/b\u003e \u003c\/td\u003e \u003ctd\u003e \u003cb\u003ePeak Lift\u003c\/b\u003e \u003c\/td\u003e \u003ctd\u003e \u003cb\u003eCenter Line\u003c\/b\u003e \u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e \u003cb\u003e Intake \u003c\/b\u003e \u003c\/td\u003e \u003ctd\u003e 264° \u003c\/td\u003e \u003ctd\u003e 226° \u003c\/td\u003e \u003ctd\u003e 10.80mm \u003c\/td\u003e \u003ctd\u003e 125° \u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e \u003cb\u003e Exhaust \u003c\/b\u003e \u003c\/td\u003e \u003ctd\u003e 264° \u003c\/td\u003e \u003ctd\u003e 222° \u003c\/td\u003e \u003ctd\u003e 10.50mm \u003c\/td\u003e \u003ctd\u003e 115° \u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cb\u003eGSC Recommendations:\u003c\/b\u003e\n\u003cbr\u003e\n\u003cul\u003e \u003cli\u003eCheck Pictures for cam placement. Long nose = Left Side, short nose = Right Side\u003c\/li\u003e \u003cli\u003eDue to the lobe size, head castings may need to be filed down slightly for clearance - Please check during install\u003c\/li\u003e \u003cli\u003eProper break-in and running high zinc oil is a must on flat tappet engines\u003c\/li\u003e \u003cli\u003eMust be installed by an experienced technician\u003c\/li\u003e \u003c\/ul\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":48062307074266,"sku":"GSC7025S1","price":999.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apiikqqfs__22309.1697554183.1280.1280.jpg?v=1781529598"},{"product_id":"gsc-viton-6mm-valve-stem-seal-set-for-subaru-ej205-ej207-ej257","title":"GSC Viton 6mm Valve Stem Seal Set For Subaru EJ205 \/ EJ207 \/ EJ257","description":"\u003cp\u003eGSC Power-Division 6mm Viton Valve Stem Seal set for the Subaru EJ257, EJ207 and EJ205. GSC's Viton stem seals are able to cope with higher heat than the OEM seals which reduces wear in and tear in performance engines.\u003c\/p\u003e\n\u003cp\u003eFits: Subaru EJ205 \/ EJ207 \/ EJ257\u003c\/p\u003e\n\u003cp\u003eSold in a set of 16.\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":48062307565786,"sku":"GSC1022","price":17.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/api8bokpn__61143.1697554252.1280.1280.jpg?v=1781529599"},{"product_id":"subaru-fhi-right-hand-dual-avcs-cylinder-head-for-2008-11-subaru-sti","title":"Subaru Right Hand Dual AVCS Cylinder Head for 2008-11 Subaru STI","description":"\u003cp\u003eSubaru \/ FHI Right Hand Dual AVCS Cylinder Head for 2008-11 Subaru STI. *Does not include cams, valves, valve springs or lifters and is sold individually.\u003c\/p\u003e","brand":"Subaru","offers":[{"title":"Default Title","offer_id":48062308024538,"sku":"11039AC070","price":977.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apirp55yx__76054.1697554359.1280.1280.jpg?v=1781529604"},{"product_id":"kelford-cams-stage-3-282-278-street-race-camshaft-set-for-2008-18-subaru-sti","title":"Kelford Cams Stage 3 282 \/ 278 Street \/ Race Camshaft Set For 2008-21 Subaru STI","description":"\u003cp\u003eThe Subaru STI EJ257B engine features dual AVCS (Active Valve Control System). 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The cams require shimless buckets, cylinder head clearancing for fitment and are best suited for motors with larger intake manifolds, ported heads and big turbos. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eKelford Cams 220-D: Race \/ Built Engines \u003cbr\u003eCam Lift: Intake = 11.70mm , Exhaust 11.25mm\u003cbr\u003eNet Valve Lift: Intake = 11.50mm , Exhaust = 11.00mm\u003cbr\u003eAdvertised Duration @ .25mm: Intake = 282 , Exhaust = 278\u003cbr\u003eDuration @ 1.0mm Valve Lift: Intake = 240 , Exhaust = 236\u003cbr\u003eTiming @ 1.0mm Valve Lift: IVO = 10 ATDC , EVO = 64 BBDC , IVC = 70 ABDC , EVC = 8 BTDC\u003cbr\u003eSuggested Centerline: Intake = 130, Exhaust = 126 \u003cbr\u003eValve Lift @ TDC: Intake = 0.25mm , Exhaust 0.43mm\u003cbr\u003eRequired Cylinder Head Clearancing\u003cbr\u003eGood for E85\u003c\/p\u003e","brand":"Kelford Cams","offers":[{"title":"Default Title","offer_id":48062309269722,"sku":"220-D","price":949.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apinfkrdg__68209.1697549181.1280.1280.jpg?v=1781529604"},{"product_id":"subaru-intake-cam-gear-sprocket-for-2002-05-wrx-passenger-side","title":"Subaru Intake Cam Gear Sprocket for 2002-05 WRX (Passenger Side)","description":"\u003cp\u003eSometimes the passenger side intake cam gear sprocket for 2002-05 WRX may need replacement. The cam gear is made from a plastic that sometimes cracks, chips or is damaged during a timing belt service when the hardware securing it is frozen in place.\u003c\/p\u003e","brand":"Subaru","offers":[{"title":"Default Title","offer_id":48062309728474,"sku":"13044AA061","price":135.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apipvndm5__75377.1697564807.1280.1280.jpg?v=1781529607"},{"product_id":"manley-race-flo-37mm-intake-valve-set-for-subaru-wrx-sti-fxt-lgt-8","title":"Manley Race Flo 37mm Intake Valve Set For Subaru WRX \/ STI \/ FXT \/ LGT (8)","description":"\u003cp\u003eManley Race Flo 37mm Intake Valve Set For Subaru WRX \/ STI (8). 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GSC flow tested prototype valve heads in specific applications to make sure they produced the highest flowing valve head available on the market today. The materials used create less valve distortion at the face than any of the tested designs. Less distortion allows better sealing under extreme conditions and more consistent performance throughout the life of the valve. GSC Power-Division's new valves are sure to become the industries standard for sport compact performance valves. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e Valve Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSwirl polished heads 34mm for smoother airflow over the valve\u003c\/li\u003e\n\u003cli\u003eBack cut to reduce valve weight for higher rpm, higher boost pressure and allow for more aggressive cam profiles without increasing valve spring seat pressures.\u003c\/li\u003e\n\u003cli\u003eValve stems are micro-polished to allow for less oil retention on the stem which creates less drag on the stem to guide for a smoother motion.\u003c\/li\u003e\n\u003cli\u003eIntake valves are a modified 21-4n stainless\u003c\/li\u003e\n\u003cli\u003eValve tips are either hardened or have a stelite wafer tip fused so that the tip is within 5 Rockwell C of the rocker or valve tappet for extended life and less wear\u003c\/li\u003e\n\u003cli\u003eGSC spent extra time to adjust tip heights on the applications to require less tipping of the valve to maintain proper tip height for proper valvetrain geometry and to cut down on install times when setting valve lash.\u003c\/li\u003e\n\u003cli\u003eGSC adjusted the Keeper grove to properly balance intake spring pressures to reduce the use of valve spring shims and maximize performance from our spring and retainer kits.\u003c\/li\u003e\n\u003cli\u003eValves will work with an OEM keeper\/lock or when available our upgrade keeper\/lock. It's not mandatory but it is suggested that any valve lock not be reused on performance applications do to material grooving.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003eSpecs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStandard Size (34mm Head)\u003c\/li\u003e\n\u003cli\u003eSold as a set of 8\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003eFits:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2015-21 Subaru WRX\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":48062310219994,"sku":"GSC2282-8","price":171.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apixmkrph__13744.1679493630.1280.1280.jpg?v=1781529608"},{"product_id":"gsc-exhaust-valve-guide-set-with-depth-stopper-for-2015-21-subaru-wrx-fa20-2013-20-brz-fr-s","title":"GSC Exhaust Valve Guide Set with Depth Stopper For 2015-21 Subaru WRX FA20, 2013-20 BRZ \/ FR-S","description":"\u003cp\u003eGSC Power-Division makes Subaru FA20 exhaust valve guides that fit properly, easier to install and shaped to help air flow instead of just copying the OEM design. GSC's WRX, BRZ \/ FR-S exhaust valve guides are made from true C67410 Manganese Bronze and turned on a dedicated precision CNC turning center creating some of the tightest tolerances in the industry with the best quality control possible. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e Fits: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFA20 DIT 2015-21 WRX\u003c\/li\u003e\n\u003cli\u003eFA20 2013-20 BRZ \u0026amp; Scion FR-S\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003eSold in a set of 8. \u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":48062310940890,"sku":"GSC3105-8","price":49.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apijthqur__39510.1679493804.1280.1280.jpg?v=1781529614"},{"product_id":"gsc-s3-billet-camshaft-set-for-the-04-07-sti-06-14-wrx-04-13-fxt-05-12-lgt-with-intake-avcs","title":"GSC S3 Billet Camshaft Set for the 04-07 STI, 06-14 WRX, 04-13 FXT, 05-12 LGT with Intake AVCS","description":"\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cb\u003eSpecs:\u003c\/b\u003e\n\u003cbr\u003e\n\u003ctable padding=\"2px\" width=\"80%\"\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e \u003cb\u003e 7025S3\u003c\/b\u003e \u003c\/td\u003e \u003ctd\u003e \u003cb\u003eADV Duration\u003c\/b\u003e \u003c\/td\u003e \u003ctd\u003e \u003cb\u003eDuration @ 0.040\"\u003c\/b\u003e \u003c\/td\u003e \u003ctd\u003e \u003cb\u003ePeak Lift\u003c\/b\u003e \u003c\/td\u003e \u003ctd\u003e \u003cb\u003eCenter Line\u003c\/b\u003e \u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e \u003cb\u003e Intake\u003c\/b\u003e \u003c\/td\u003e \u003ctd\u003e 280° \u003c\/td\u003e \u003ctd\u003e 240° \u003c\/td\u003e \u003ctd\u003e 11.55mm \u003c\/td\u003e \u003ctd\u003e 130° \u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e \u003cb\u003e Exhaust \u003c\/b\u003e \u003c\/td\u003e \u003ctd\u003e 280° \u003c\/td\u003e \u003ctd\u003e 241° \u003c\/td\u003e \u003ctd\u003e 11.60mm \u003c\/td\u003e \u003ctd\u003e 115° \u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cb\u003eGSC Recommendations:\u003c\/b\u003e\n\u003cbr\u003e\n\u003cul\u003e \u003cli\u003eCheck Pictures for cam placement. Long nose = Left Side, short nose = Right Side\u003c\/li\u003e \u003cli\u003eDue to the lobe size, head castings may need to be filed down slightly for clearance - Please check during install\u003c\/li\u003e \u003cli\u003eProper break-in and running high zinc oil is a must on flat tappet engines\u003c\/li\u003e \u003cli\u003eMust be installed by an experienced technician\u003c\/li\u003e \u003c\/ul\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":48062311825626,"sku":"GSC7025S3","price":999.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apihcxls1__45043.1697565301.1280.1280.jpg?v=1781529617"},{"product_id":"chain-tensioner-for-2015-21-subaru-wrx-13-17-brz","title":"Subaru Chain Tensioner For 2015-21 Subaru WRX, 13-20 BRZ","description":"\u003cp\u003eChain Tensioner For 2015-21 Subaru WRX, 13-20 BRZ\u003c\/p\u003e","brand":"Subaru","offers":[{"title":"Default Title","offer_id":48062312874202,"sku":"13142AA090","price":110.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apidgtus6__50787.1692125307.1280.1280.jpg?v=1781529617"},{"product_id":"gsc-super-alloy-32mm-standard-exhaust-valve-set-for-subaru-ej20-ej25","title":"GSC Super Alloy 32mm Standard Exhaust Valve Set for Subaru EJ20 \/ EJ25","description":"\u003cp\u003eRunning high horsepower with high EGT's requires a valve that will last in 2000F conditions. GSC 32mm standard size Super Alloy Exhaust valves have chrome polished stems to create a smooth, durable finish for added life and better lubricity especially when paired with the GSC Manganese bronze valve guides. Strength, heat resistance and performance are engineered into every valve. Under head dish is maximized for weight savings while swirl polished and backcut heads promote better air flow without sacrificing durability.\u003c\/p\u003e\n\u003cp\u003eSold in a set of 8.\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":48062312841434,"sku":"GSC2015-8","price":292.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apizgm38e__98002.1697565615.1280.1280.jpg?v=1781529618"},{"product_id":"subaru-drivers-side-avcs-intake-cam-gear-for-2006-14-wrx-2004-21-sti-2004-13-fxt-2005-12-lgt","title":"Subaru Drivers Side AVCS Intake Cam Gear For 2006-14 WRX, 2004-21 STI, 2004-13 FXT \u0026 2005-12 LGT","description":"\u003cp\u003eSubaru Drivers Side (Left Hand Side) AVCS Intake Cam Gear (Sprocket) fits the 2006-14 WRX, 2004-21 STI, 2004-13 Forester XT and 2005-12 Legacy GT.\u003c\/p\u003e","brand":"Subaru","offers":[{"title":"Default Title","offer_id":48062312612058,"sku":"13322AA001","price":283.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apiknihzu__78197.1695327380.1280.1280.jpg?v=1781529618"},{"product_id":"kelford-cams-268-264-street-race-cam-shafts-for-2002-05-subaru-wrx-non-avcs-ej20-engines","title":"Kelford Cams 268 \/ 264 Street \u0026 Race Cam Shafts For 2002-05 Subaru WRX Non AVCS EJ20 Engines","description":"\u003cp\u003eKelford Cams make the best high performance Subaru camshafts available. Manufactured in-house using an ultra modern design system and ground using masterless CNC grinders with CBN cutting wheel technology for superior quality and consistency. The Kelford 199-C Street \/ Race cam shafts suit the 2002-05 2.0L Turbo engines that do not have AVCS. These cams feature a 268 \/ 264 Duration, 10.50mm \/ 10.25mm Lift which is a fantastic street performance or track day camshaft which suits upgraded turbos. 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The BC bolt features OEM thread pitch and under head length. \u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSet Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e(x2) BC8899 AVCS Bolts\u003c\/li\u003e\n\u003cli\u003e(x2) BC8898 Non AVCS Bolts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e","brand":"Brian Crower","offers":[{"title":"Default Title","offer_id":48062312906970,"sku":"BC8898-99K4","price":146.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/api2blll4__47251.1694464453.1280.1280.jpg?v=1781529621"},{"product_id":"subaru-passenger-side-avcs-intake-cam-gear-for-2006-14-wrx-2004-21-sti-2004-13-fxt-2005-12-lgt","title":"Subaru Passenger Side AVCS Intake Cam Gear For 2006-14 WRX, 2004-21 STI, 2004-13 FXT \u0026 2005-12 LGT","description":"\u003cp\u003eSubaru Passenger Side AVCS Intake Cam Gear (Sprocket) fits the 2006-14 WRX, 2004-21 STI, 2004-13 Forester XT and 2005-12 Legacy GT.\u003c\/p\u003e","brand":"Subaru","offers":[{"title":"Default Title","offer_id":48062312677594,"sku":"13320AA001","price":284.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/api8s8oef__56812.1692734960.1280.1280.jpg?v=1781529623"},{"product_id":"iag-black-avcs-camshaft-sensor-plugs-pair-for-2002-05-subaru-wrx-w-avcs-heads","title":"IAG Black AVCS Camshaft Sensor Plugs (Pair) For 2002-05 Subaru WRX w\/ USDM AVCS Heads","description":"\u003cbr\u003e\n\u003cbr\u003e\n\u003cb\u003eIncludes:\u003c\/b\u003e\n\u003cbr\u003e\n\u003cul\u003e \u003cli\u003e(x2) CNC Billet Plugs \u003c\/li\u003e \u003cli\u003e(x2) O-ring seals\u003c\/li\u003e \u003cli\u003e(x2) M6x12mm Socket Head Cap Screws\u003c\/li\u003e \u003c\/ul\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e","brand":"IAG Performance","offers":[{"title":"Default Title","offer_id":48062313955546,"sku":"IAG-ENG-2060BK","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apisdx6vt__23649.1633558641.1280.1280.jpg?v=1781529625"},{"product_id":"gsc-beehive-valve-springs-and-titanium-retainer-set-for-subaru-ej-engines","title":"GSC Beehive Valve Springs and Titanium Retainer Set for Subaru EJ Engines","description":"\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cb\u003e Benefits:\u003c\/b\u003e\n\u003cbr\u003e\n\u003cul\u003e \u003cli\u003eRev faster \u003c\/li\u003e \u003cli\u003eLighter components \u003c\/li\u003e \u003cli\u003eMore durable design \u003c\/li\u003e \u003cli\u003eLess stress on valvetrain components \u003c\/li\u003e \u003cli\u003eLower spring frequency for more precise valve control. \u003c\/li\u003e \u003cli\u003eMore valve control equals more aggressive cam profiles \u003c\/li\u003e \u003cli\u003eNano peened for faster break in and less stressed springs \u003c\/li\u003e \u003cli\u003eAll of these items help to return more power for you to enjoy!\u003c\/li\u003e \u003c\/ul\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cb\u003e \u003cbr\u003e5043 Beehive Spring Pressure:\u003c\/b\u003e\n\u003cbr\u003e\n\u003cul\u003e \u003cli\u003eSeat: 85 lbs @ 1.369\" (34.8mm) Valve Lift\u003c\/li\u003e \u003cli\u003e 225lbs @ .433\" (11mm) Valve Lift \u003c\/li\u003e \u003cli\u003e Coil bind @ .550\" (14mm) Valve Lift \u003c\/li\u003e \u003c\/ul\u003e\n\u003cbr\u003e\n\u003cb\u003e 5043 Beehive Rev and Boost range (using an S3 profile camshaft set) \u003c\/b\u003e\n\u003cbr\u003e\n\u003cul\u003e \u003cli\u003eMax RPM: 9,500 \u003c\/li\u003e \u003cli\u003e Max boost: 35psi+\u003c\/li\u003e \u003c\/ul\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":48062313431258,"sku":"GSC5043","price":399.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apijtzosx__85473.1697565898.1280.1280.jpg?v=1781529624"},{"product_id":"kelford-cams-282-278-drag-racing-high-hp-cams-for-all-subaru-2-5l-single-avcs-engines","title":"Kelford Cams 282 \/ 278 Drag Racing High HP Cams for All Subaru 2.5L Single AVCS Engines","description":"\u003cp\u003eKelford Cams R-199-D cams are designed for all Subaru 2.5L Single AVCS EJ25 engines. The cams feature 282 \/ 278 duration, 11.70mm \/ 11.25mm Lift. 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GSC's valve guides are made from true C67410 Manganese Bronze and turned on a dedicated precision CNC turning center. 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Long nose = Left Side, short nose = Right Side \u003c\/li\u003e \u003cli\u003eDue to the lobe size, head castings will need to be filed down slightly for clearance - Please check during install \u003c\/li\u003e \u003cli\u003eProper break-in and running high zinc oil is a must on flat tappet engines \u003c\/li\u003e \u003cli\u003eMust be installed by an experienced technician\u003c\/li\u003e \u003cbr\u003e \u003c\/ul\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":48062314217690,"sku":"GSC7020S3","price":932.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/api26m8dj__87718.1697566151.1280.1280.jpg?v=1781529628"},{"product_id":"gsc-power-division-1mm-exhaust-valves-for-2015-21-subaru-wrx","title":"GSC Power-Division +1mm Exhaust Valves For 2015-21 Subaru WRX","description":"\u003cp\u003eGSC's set out to create the best performance longest lasting valves available to the aftermarket by using advanced 3D design and simulation programs they created a stronger and higher flowing valve head design. GSC flow tested prototype valve heads in specific applications to make sure they produced the highest flowing valve head available on the market today. The materials used create less valve distortion at the face than any of the tested designs. Less distortion allows better sealing under extreme conditions and more consistent performance throughout the life of the valve. GSC Power-Division's new valves are sure to become the industries standard for sport compact performance valves. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e Valve Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSwirl polished heads for smoother airflow over the valve\u003c\/li\u003e\n\u003cli\u003eBack cut to reduce valve weight for higher rpm, higher boost pressure and allow for more aggressive cam profiles without increasing valve spring seat pressures.\u003c\/li\u003e\n\u003cli\u003eValve stems are micro-polished to allow for less oil retention on the stem which creates less drag on the stem to guide for a smoother motion.\u003c\/li\u003e\n\u003cli\u003eExhaust valves are a modified 23-8n stainless material for high heat capacity while maintaining longevity.\u003c\/li\u003e\n\u003cli\u003eValve tips are either hardened or have a stelite wafer tip fused so that the tip is within 5 Rockwell C of the rocker or valve tappet for extended life and less wear\u003c\/li\u003e\n\u003cli\u003eGSC spent extra time to adjust tip heights on the applications to require less tipping of the valve to maintain proper tip height for proper valvetrain geometry and to cut down on install times when setting valve lash.\u003c\/li\u003e\n\u003cli\u003eGSC adjusted the Keeper grove to properly balance exhaust spring pressures to reduce the use of valve spring shims and maximize performance from our spring and retainer kits.\u003c\/li\u003e\n\u003cli\u003eValves will work with an OEM keeper\/lock or when available our upgrade keeper\/lock. It's not mandatory but it is suggested that any valve lock not be reused on performance applications due to material grooving.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003eSpecs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e+1mm Oversize (30mm Head)\u003c\/li\u003e\n\u003cli\u003eSold as a set of 8\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003eFits:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2015-21 Subaru WRX\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":48062314512602,"sku":"GSC2283-8","price":174.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apienzoaa__10812.1679493533.1280.1280.jpg?v=1781529627"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/collections\/ce51d015-e857-4dd3-bf15-5f143ac78c63.png?v=1781714801","url":"https:\/\/www.iagperformance.com\/collections\/engine-engine-builds-cylinder-heads-parts.oembed","provider":"IAG Performance","version":"1.0","type":"link"}