{"title":"Subaru — All EJ257","description":"","products":[{"product_id":"billet-s3-camshaft-set-for-subaru-ej257-dual-avcs","title":"Billet S3 Camshaft set for Subaru EJ257 Dual AVCS","description":"\u003cp\u003eGSC Power-Division billet S2 camshafts for the 08+ Subaru STi EJ257 with Dual AVCS. These cams are built to suit the higher horsepower Subis. With a power range of 500 WHP and up, you need some certain mods to utilize the true potential of the S2s: built motor, with a built\/ported head, and a good engine management system.\u003c\/p\u003e\n\u003cp\u003eUpgraded valve springs are\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003erequired\u003c\/strong\u003e; beehive valve springs are recommended but not required.\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\u003c\/ul\u003e","brand":"GSC Power Division","offers":[{"title":"Default","offer_id":46908416721134,"sku":"GSC7026S3","price":1245.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/2425\/6494\/files\/gsc-power-division-GSC7026S3-1.png?v=1762967593"},{"product_id":"billet-s2-camshaft-set-for-subaru-ej257-dual-avcs","title":"Billet S2 Camshaft set for Subaru EJ257 Dual AVCS","description":"\u003cp\u003eGSC Power-Division billet S2 camshafts for the 08+ Subaru STi EJ257 with Dual AVCS. These cams are built to suit the higher horsepower Subis. With a power range of 500 WHP and up, you need some certain mods to utilize the true potential of the S2s: built motor, with a built\/ported head, and a good engine management system. \u003cbr\u003e\u003cbr\u003eUpgraded valve springs are\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003erequired\u003c\/strong\u003e; beehive valve springs are recommended but not required.\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\u003c\/ul\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":47310391017710,"sku":"GSC7026S2","price":1245.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/2425\/6494\/files\/gsc-power-division-GSC7026S2-1.png?v=1774294136"},{"product_id":"gsc-power-division-viton-valve-stem-seals-for-the-subaru-ej-engine","title":"GSC Power-Division Viton Valve Stem Seals for the Subaru EJ Engine","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eGSC Power-Division Viton Valve Stem Seals for the Subaru EJ257, EJ207, and EJ205 6mm seal set. These are an upgrade from the standard OEM material to help cope with the higher heat caused increasing the performance of your engine. Sold as a set of 16\u003c\/span\u003e\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":47310750154990,"sku":"GSC1022","price":20.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/2425\/6494\/files\/gsc-power-division-GSC1022-1.png?v=1764685810"},{"product_id":"gsc-power-division-oem-replacement-valve-keeper-set-for-subaru-ej-engines","title":"GSC Power-Division OEM Replacement Valve Keeper Set for Subaru EJ Engines","description":"\u003cp\u003eThese can be used in place of the OEM on stock valves and retainers as well. New keepers are recommended anytime the valves are replaced for proper fitment in the valve groove. Proper fitment allows for rotation and stability for the valve train. \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGSC Keepers are made from a higher-grade steel than OEM. \u003c\/li\u003e\n\u003cli\u003eTighter tolerances allow for more consistent valve spring install heights \u003c\/li\u003e\n\u003cli\u003eGSC Keepers feature black oxide coating to prevent sticking and aid in rust prevention.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":47311000076526,"sku":"GSC1006","price":38.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/2425\/6494\/files\/gsc-power-division-GSC1006-1.png?v=1764686378"},{"product_id":"gsc-power-division-subaru-ej-valve-spring-seats-oem-replacement","title":"GSC Power-Division Subaru EJ Valve Spring Seats, OEM Replacement","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\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. Sold as a set of 16.\u003c\/span\u003e\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":47311014133998,"sku":"GSC1005","price":26.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/2425\/6494\/files\/gsc-power-division-GSC1005-1.png?v=1764686504"},{"product_id":"gsc-power-division-single-valve-spring-and-titanium-retainer-kit-for-subaru-turbo-ej-platforms","title":"GSC Power-Division Single Valve Spring and Titanium Retainer Kit for Subaru Turbo EJ Platforms","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThe GSC Power-Division Single Cylindrical Valve Spring with Ti Retainer for the DOHC Subaru Turbo EJ platforms includes 16 titanium retainers and 16 cylindrical valve springs. These round wire springs still have the same high-quality attention to detail as our popular beehive kits. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe GSC5743 is Nano-peened and batched according to seat pressure within our specs. The lightweight titanium retainers are CNC-machined with tolerances and repeatability that are unmatched by other brands. This keeps a consistent seat pressure across the head for ultimate reliability and performance.\u003cmeta charset=\"utf-8\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis is a great spring kit for the daily driver with an S1 or S2 cam profile that keeps the boost and revs below 32 psi and 8,000 RPM. \u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e78 lbs @ 1.326\" install height \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e197 lbs @ 0.913\"\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Full Kit","offer_id":47311136489710,"sku":"GSC5743","price":332.31,"currency_code":"USD","in_stock":false},{"title":"Single Spring","offer_id":47311136522478,"sku":"TVS1855","price":8.79,"currency_code":"USD","in_stock":false},{"title":"Single Retainer","offer_id":47311136555246,"sku":"RET5743","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/2425\/6494\/files\/gsc-power-division-TVS1855-1.png?v=1764686688"},{"product_id":"gsc-power-division-beehive-spring-set-with-titanium-retainer-for-the-subaru-turbo-ej-platforms","title":"GSC Power-Division Beehive Spring Set with Titanium Retainer for the Subaru Turbo EJ Platforms","description":"\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003eThe GSC Power-Division Beehive Valve Spring Kit with Ti Retainer for the DOHC Subaru Turbo EJ Platforms includes 16 titanium retainers and 16 beehive valve springs. Our beehive spring is made with an ovate wire which utilizes advanced material heat treatment methods for superior load loss capabilities. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThese springs have the highest level of spring load retention while still maintaining good fatigue throughout the life of the spring. Beehive springs allow for the use of a smaller, lighter retainer allowing for higher RPM and more valve control. \u003c\/span\u003e\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":47311446343918,"sku":"GSC5043","price":470.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/2425\/6494\/files\/gsc-power-division-GSC5043-1.png?v=1764687741"},{"product_id":"gsc-power-division-conical-spring-set-with-titanium-retainer-and-chromoly-seat-for-the-subaru-turbo-ej-platforms","title":"GSC Power-Division Conical Spring Set with Titanium Retainer and Chromoly Seat for the Subaru Turbo EJ Platforms","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThe GSC Power-Division High Pressure Conical Valve Spring with Ti Retainer for Subaru Turbo EJ Platforms includes 16 titanium retainers, 16 conical valve springs, and 16 chromoly valve spring seats. High RPM and High Boost levels are not a problem on these kits. True conical valve springs are not a new concept and are industry proven to provide several key advantages over traditional spring designs. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA major advantage of conical springs vs. traditional cylindrical or beehive springs is the damping and removal of valvetrain harmonics. Of the three designs, conical springs are the front runners in valvetrain harmonic stability. Utilizing a varying coil diameter as well as coil spacing, a conical spring acts as a natural harmonic damper in the transfer of valvetrain shock. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis translates to less stress, less wear, and a longer life of the included components. This level of protection is needed in today’s engines being pushed to their physical and mechanical limits by aftermarket modifications. Every GSC conical spring offers a super-finished surface treatment to go along with the patented, multi-step heat treatment process. The finished product is an extremely reliable, high-performance spring allowing the users to push higher RPMs, use more aggressive cam profiles, and turn up higher boost pressures.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eGSC Power-Division CONICAL Spring Set with Titanium Retainer for the Subaru Turbo EJ Platforms\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":47311563161838,"sku":"GSC5076","price":609.24,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/2425\/6494\/files\/gsc-power-division-GSC5076-1.png?v=1764688348"},{"product_id":"gsc-power-division-dual-conical-valve-spring-set-with-titanium-retainer-chromoly-seats-for-the-subaru-turbo-ej-platforms","title":"GSC Power-Division Dual Conical Valve Spring Set with Titanium Retainer \u0026 Chromoly Seats for the Subaru Turbo EJ Platforms","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThe GSC Power-Division Dual Conical Valve Spring Kit with Ti Retainer \u0026amp; Chromoly Seats for the Subaru Turbo EJ platforms includes 16 titanium retainers, 16 dual conical valve spring sets, and 16 chromoly valve spring seats. \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":47311678013678,"sku":"GSC5074","price":753.24,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/2425\/6494\/files\/gsc-power-division-GSC5074-1.png?v=1764688487"},{"product_id":"gsc-power-division-high-pressure-conical-spring-set-with-titanium-retainer-and-chromoly-spring-seat-for-the-subaru-turbo-ej-platforms","title":"GSC Power-Division High Pressure Conical Spring Set with Titanium Retainer and Chromoly Spring Seat for the Subaru Turbo EJ Platforms","description":"\u003cp\u003eThe GSC Power-Division High Pressure Conical Valve Spring with Ti Retainer for Subaru Turbo EJ Platforms includes\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eHigh RPM and High Boost levels are not a problem on these kits. True conical valve springs are not a new concept and are industry proven to provide several key advantages over traditional spring designs. A major advantage of conical springs vs. traditional cylindrical or beehive springs is the damping and removal of valvetrain harmonics. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eOf the three designs, conical springs are the front runners in valvetrain harmonic stability. Utilizing a varying coil diameter as well as coil spacing, a conical spring acts as a natural harmonic damper in the transfer of valvetrain shock. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eThis translates to less stress, less wear, and a longer life of the included components. This level of protection is needed in today’s engines being pushed to their physical and mechanical limits by aftermarket modifications. Every GSC conical spring offers a super finished surface treatment to go along with the patented, multi-step heat treatment process. The finished product is an extremely reliable, high-performance spring allowing the users to push higher RPM's, use more aggressive cam profiles, and turn up higher boost pressures.\u003c\/span\u003e\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":47311757345006,"sku":"GSC5073","price":609.24,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/2425\/6494\/files\/gsc-power-division-GSC5073-1.png?v=1764688715"},{"product_id":"gsc-power-division-exhaust-valve-32mm-std-for-the-subaru-ej20-ej257-turbo-engine","title":"GSC Power-Division Exhaust Valve 32mm (STD) for the Subaru EJ20\/EJ257 Turbo Engine","description":"\u003cp\u003eWhen creating our new valve line we set out to create the best performance, longest lasting valves available to the aftermarket. Using advanced 3D design and simulation software, we have created a stronger and higher flowing valve head design. We flow test prototype valve heads in the specific applications to make sure we have the highest flowing valve head available on the market today.\u003c\/p\u003e\n\u003cp\u003eWith the materials used, we have less valve distortion at the face than any of the tested designs. Less distortion allows for 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 industry standard for sport compact performance valves.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Set ( 8 )","offer_id":47311969353966,"sku":"GSC2011-8","price":195.57,"currency_code":"USD","in_stock":true},{"title":"Single ( 1 )","offer_id":47311969386734,"sku":"GSC2011-01","price":25.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/2425\/6494\/files\/gsc-power-division-GSC2011-1.png?v=1764689412"},{"product_id":"gsc-power-division-intake-valve-36mm-std-for-the-subaru-ej20-ej257-turbo-engine","title":"GSC Power-Division Intake Valve 36mm (STD) for the Subaru EJ20\/EJ257 Turbo Engine","description":"\u003cp\u003eWhen creating our new valve line we set out to create the best performance, longest lasting valves available to the aftermarket. Using advanced 3D design and simulation software, we have created a stronger and higher flowing valve head design. We flow test prototype valve heads in the specific applications to make sure we have the highest flowing valve head available on the market today.\u003c\/p\u003e\n\u003cp\u003eWith the materials used, we have less valve distortion at the face than any of the tested designs. Less distortion allows for 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 industry standard for sport compact performance valves.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Set ( 8 )","offer_id":47346547065070,"sku":"GSC2012-8","price":195.13,"currency_code":"USD","in_stock":true},{"title":"Single ( 1 )","offer_id":47346547097838,"sku":"GSC2012-01","price":25.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/2425\/6494\/files\/gsc-power-division-GSC2012-1.png?v=1764773713"},{"product_id":"gsc-power-division-super-alloy-exhaust-valve-for-the-subaru-ej20-ej257-turbo-engine","title":"GSC Power-Division Super Alloy Exhaust Valve for the Subaru EJ20\/EJ257 Turbo Engine","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eGSC Power-Division Super Alloy Exhaust Valves for EJ20\/25 Turbo are for those running high horsepower, high EGT set ups that need a valve that will last in 2000°F conditions. The 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.\u003cbr\u003e\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003eSTD size 32mm \u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Set ( 8 )","offer_id":47380591050990,"sku":"GSC2015-8","price":344.05,"currency_code":"USD","in_stock":true},{"title":"Single ( 1 )","offer_id":47380591083758,"sku":"GSC2015-01","price":44.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/2425\/6494\/files\/gsc-power-division-GSC2015-1.png?v=1765223248"},{"product_id":"gsc-power-division-exhaust-valve-33mm-1mm-for-the-subaru-ej20-ej257-turbo-engine","title":"GSC Power-Division Exhaust Valve 33mm (+1mm) for the Subaru EJ20\/EJ257 Turbo Engine","description":"\u003cp\u003eGSC Power-Division Exhaust Valve for EJ Turbo\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValve Size\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003e+1mm - 33mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Set ( 8 )","offer_id":47380958150894,"sku":"GSC2013-8","price":196.9,"currency_code":"USD","in_stock":true},{"title":"Single ( 1 )","offer_id":47380958183662,"sku":"GSC2013-01","price":25.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/2425\/6494\/files\/gsc-power-division-GSC2013-1.png?v=1765227949"},{"product_id":"gsc-power-division-intake-valve-37mm-1mm-for-the-subaru-ej20-ej257-turbo-engine","title":"GSC Power-Division Intake Valve 37mm (+1mm) for the Subaru EJ20\/EJ257 Turbo Engine","description":"\u003cp\u003eWhen creating our new valve line we set out to create the best performance, longest lasting valves available to the aftermarket. 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GSC Power-Division's new valves are sure to become the industry standard for sport compact performance valves.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eValve Size\u003c\/strong\u003e\u003cbr\u003e+1mm - 37mm\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Set ( 8 )","offer_id":47380962148590,"sku":"GSC2014-8","price":196.46,"currency_code":"USD","in_stock":true},{"title":"Single ( 1 )","offer_id":47380962181358,"sku":"GSC2014-01","price":25.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/2425\/6494\/files\/gsc-power-division-GSC2014-1.png?v=1765228138"},{"product_id":"gsc-power-division-super-alloy-exhaust-valve-1mm-head-for-the-subaru-ej20-ej257-turbo-engine","title":"GSC Power-Division Super Alloy Exhaust Valve (+1mm) Head for the Subaru EJ20\/EJ257 Turbo Engine","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eGSC Power-Division Super Alloy Exhaust Valves for EJ20\/25 Turbo are for those running high horsepower, high EGT set ups that need a valve that will last in 2000°F conditions. The 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. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eStrength, heat resistance, and performance are engineered into every valve. 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