{"title":"Valvetrain Components","description":"\u003cp\u003eShop Subaru valvetrain components at IAG Performance for WRX, STI, BRZ, Legacy GT, and Forester XT EJ20, EJ25, and FA20 engines, including valve springs, retainers, and valves from GSC Power Division, Manley, and Brian Crower. These upgrades are essential for builders pushing higher RPM and boost levels.\u003c\/p\u003e","products":[{"product_id":"manley-beehive-valve-spring-titanium-retainer-set-for-2002-14-subaru-wrx-2004-21-sti-05-12-lgt-04-13-fxt","title":"Manley Beehive Valve Spring \u0026 Titanium Retainer Set For 2002-14 Subaru WRX, 2004-21 STI, 05-12 LGT, 04-13 FXT","description":"\u003cbr\u003e\n\u003cbr\u003e\n\u003cstrong\u003eValve Spring Specs:\u003c\/strong\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cstrong\u003eRetainer Specs:\u003c\/strong\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e","brand":"Manley Performance","offers":[{"title":"Default Title","offer_id":48062299898074,"sku":"26185","price":532.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apickdgtk__81283.1695404360.1280.1280.jpg?v=1781529566"},{"product_id":"gsc-subaru-ej-valve-spring-seats-oem-style-replacement","title":"GSC Subaru EJ Valve Spring Seats OEM Style Replacement","description":"\u003cp\u003eGSC Power-Division Spring Seats are now available for the Subaru Turbo EJ series. The GSC1005 is an OEM replacement stamped spring seat, usable with GSC Power-Division 5043 or 5743 upgraded valve spring kits or stock springs as an alternative to expensive dealership parts.\u003c\/p\u003e\n\u003cp\u003eSold as a set of 16.\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":48062300979418,"sku":"GSC1005","price":22.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apivjvauq__93735.1643726938.1280.1280.jpg?v=1781529565"},{"product_id":"gsc-power-division-1mm-oversize-intake-valves-for-2015-21-subaru-wrx","title":"GSC Power-Division +1mm Oversize Intake 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 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":"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":"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). Manley Intake valves are made from NK-842 Stainless, are Swirl Polished, Fully Machined, feature Chrome Stems and Hard Tips.\u003c\/p\u003e\n\u003cp\u003eType: Intake  Head Diameter: 37mm Stem Diameter: 6.0mm\/.2362\" Installed Height: Stock Overall Length: 104.6mm Tip Length: 3.5mm Underhead Angle\/Radius Pro Flo 22 x 5\/16\" Margin .050 Seat Width .080 Top Of Head 17 Dish\u003c\/p\u003e","brand":"Manley Performance","offers":[{"title":"Default Title","offer_id":48062310580442,"sku":"11140-8","price":211.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/api98tdq3__38445.1697565050.1280.1280.jpg?v=1781529607"},{"product_id":"gsc-power-division-standard-size-intake-valves-for-2015-21-subaru-wrx","title":"GSC Power-Division Standard Size Intake 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 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-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":"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":"gsc-intake-valve-guide-set-with-depth-stopper-for-subaru-ej20-ej25","title":"GSC Intake Valve Guide Set with Depth Stopper For Subaru EJ20 \/ EJ25","description":"\u003cp\u003eGSC Power-Division valve guides with depth stop fit properly, are easier to install and shaped to help air flow instead of just copying the OEM design. GSC's valve guides are made from true C67410 Manganese Bronze and turned on a dedicated precision CNC turning center. What this means for you and your installer is less time fitting guides to the head due to holding the tightest tolerances in the industry with the best quality control possible.\u003c\/p\u003e\n\u003cp\u003eFits: EJ series: EJ205, EJ207, EJ257, EJ257B\u003c\/p\u003e\n\u003cp\u003eSold in a set of 8.\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":48062314086618,"sku":"GSC3026-8","price":49.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apiovvnj7__87343.1697566008.1280.1280.jpg?v=1781529626"},{"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. 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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"},{"product_id":"gsc-exhaust-valve-guide-set-with-depth-stopper-for-subaru-ej20-ej25","title":"GSC Exhaust Valve Guide Set with Depth Stopper For Subaru EJ20 \/ EJ25","description":"\u003cp\u003eGSC Power-Division makes exhaust valve guides that fit properly, easier to install and shaped to help air flow instead of just copying the OEM design. GSC's Subaru EJ20 \/ EJ25 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.\u003c\/p\u003e\n\u003cp\u003eFits: EJ series: EJ205, EJ207, EJ257, EJ257B\u003c\/p\u003e\n\u003cp\u003eSold in a set of 8.\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":48062321230042,"sku":"GSC3025-8","price":49.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/8623\/0234\/files\/apihiswqi__63984.1697746664.1280.1280.jpg?v=1781529641"},{"product_id":"gsc-super-alloy-33mm-oversize-exhaust-valve-set-for-subaru-ej20-ej25","title":"GSC Super Alloy 33mm Oversize 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 33mm +1 Oversize 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. 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These are great for boosted applications or high revving NA engines needing more spring with out breaking the bank. 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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 valve train 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. 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