{"title":"Performance Engine Valves","description":"\u003cp\u003eThe best performance engine valves for your build are the ones matched to your cylinder head, camshafts, and power goals. For street and track builds on stock or mild cams, a quality stainless or black-nitrided valve in standard size from Brian Crower or Supertech is the reliable pick. For high-boost or high-RPM builds with aggressive cams and a ported head, oversized valves with matching springs and retainers unlock more flow. Either way, match the valve to the head — and check your year and model before ordering.\u003c\/p\u003e\n\u003cp\u003eValves are the gates of the combustion chamber: intake valves meter the charge in, exhaust valves let spent gases out. Performance valves use better materials and tighter tolerances — black-nitrided stainless resists wear and micro-welding, while GSC Power-Division's chrome-polished valves cut friction further. Oversize options add flow when the ports are opened up to match. Valves go in during a head rebuild — springs, retainers, and guides are usually refreshed at the same time, and most owners leave the valve job to a machine shop.\u003c\/p\u003e\n\u003cp\u003ePopular brands here include \u003ca href=\"https:\/\/jdmuscleusa.com\/collections\/brian-crower\"\u003eBrian Crower\u003c\/a\u003e, \u003ca href=\"https:\/\/jdmuscleusa.com\/collections\/supertech\"\u003eSupertech\u003c\/a\u003e, and GSC Power-Division — three trusted valvetrain brands for Subaru, Honda, and Mitsubishi builds.\u003c\/p\u003e\n\u003cp\u003eComplete your build: \u003ca href=\"https:\/\/jdmuscleusa.com\/collections\/connecting-rods\"\u003eConnecting rods\u003c\/a\u003e, \u003ca href=\"https:\/\/jdmuscleusa.com\/collections\/je-pistons\"\u003eJE Pistons\u003c\/a\u003e, \u003ca href=\"https:\/\/jdmuscleusa.com\/collections\/cp-pistons\"\u003eCP Pistons\u003c\/a\u003e, \u003ca href=\"https:\/\/jdmuscleusa.com\/products\/brian-crower-intake-valves-subaru-wrx-2002-2014-sti-2004-2019\"\u003eBrian Crower Intake Valves for WRX\/STI\u003c\/a\u003e, \u003ca href=\"https:\/\/jdmuscleusa.com\/products\/gsc-p-d-chrome-polished-intake-valve-34mm-head-std-evo-1-9-90-98-dsm\"\u003eGSC Intake Valve Set for Evo\/DSM\u003c\/a\u003e, and our \u003ca href=\"https:\/\/jdmuscleusa.com\/blogs\/news\/product-highlight-2015-fa-engine-wrx\"\u003eFA engine product highlight\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eDo bigger valves add power by themselves?\u003c\/h3\u003e\n\u003cp\u003eSomewhat. Oversize valves flow more air, but the gains show up when paired with ported heads and cams that can use the extra flow — valves alone on a stock head won't transform the car.\u003c\/p\u003e\n\u003ch3\u003eDo I need new valve springs with performance valves?\u003c\/h3\u003e\n\u003cp\u003eWith upgraded camshafts, yes. Higher lift can cause stock springs to coil-bind, so match springs and retainers to the cam card. With stock cams and standard-size valves, fresh stock-spec springs are usually fine.\u003c\/p\u003e\n\u003ch3\u003eWhat is the difference between intake and exhaust valves?\u003c\/h3\u003e\n\u003cp\u003eExhaust valves live a much hotter life, so heat resistance matters more on the exhaust side — nitrided or high-temp alloys are the common choice for turbo applications, while intake valves prioritize flow and light weight.\u003c\/p\u003e\n\u003ch3\u003eSingle valves or full sets?\u003c\/h3\u003e\n\u003cp\u003eBoth are sold here. Full sets make sense for a complete head build; singles are handy when replacing one damaged valve. Check your year and model, and confirm standard versus oversize sizing before you buy.\u003c\/p\u003e","products":[{"product_id":"brian-crower-intake-valves-subaru-wrx-2002-2014-sti-2004-2019","title":"Brian Crower Intake Valves WRX 2002-2014 \/ STI 2004-2019","description":"BC valves are made from premium stainless steel, fully machined and swirl polished for ultimate air flow. Dished head for added weight savings and increased valve control at high rpm. Standard and oversize head. To ensure you get the correct length valves you must measure your stock valves as Brain Crower valves are available in 104.78mm and 106.12mm over all length.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eNotes:\u003c\/b\u003e\u003cul\u003e    \u003cli\u003e Sold in sets of 8.  \u003c\/li\u003e\n\u003cli\u003e Oversized valves required headwork to be compatible.\u003c\/li\u003e\n\u003c\/ul\u003eMust specify short (104.78mm OAL) or long (106.12mm OAL) tip valves when ordering!","brand":"Brian Crower","offers":[{"title":"36mm Short Intake Valves (OEM Size)","offer_id":31125792456806,"sku":"BC3600-S","price":197.0,"currency_code":"USD","in_stock":true},{"title":"37mm Short Intake Valves (+1mm OS)","offer_id":31125792489574,"sku":"BBC3604-S","price":147.81,"currency_code":"USD","in_stock":true},{"title":"36mm Long Intake Valves (OEM Size)","offer_id":31125792522342,"sku":"BC3600-LONG","price":147.81,"currency_code":"USD","in_stock":true},{"title":"37mm Long Intake Valves (+1mm OS)","offer_id":31125792555110,"sku":"BC3604-LONG","price":147.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0075\/8703\/7237\/products\/brian-crower-intake-valves-subaru-wrx-2002-2014-sti-2004-2019-valves-brian-crower-36mm-short-intake-valves-oem-size-bc3600-s.jpg?v=1614520697"},{"product_id":"brian-crower-exhaust-valves-wrx-2002-2014-sti-2004-2019","title":"Brian Crower Exhaust Valves WRX 2002-2014 \/ STI 2004-2019","description":"BC valves are made from premium stainless steel, fully machined and swirl polished for ultimate air flow. Dished head for added weight savings and increased valve control at high rpm. Standard and oversize head. To ensure you get the correct length valves you must measure your stock valves as Brain Crower valves are available in 104.78mm and 106.12mm over all length.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eNotes:\u003c\/b\u003e\u003cul\u003e    \u003cli\u003e Sold in sets of 8.  \u003c\/li\u003e\n\u003cli\u003e Oversized valves required headwork to be compatible.\u003c\/li\u003e\n\u003c\/ul\u003eMust specify short (104.78mm OAL) or long (106.12mm OAL) tip valves when ordering!","brand":"Brian Crower","offers":[{"title":"32mm Short Exhaust Valves (OEM Size)","offer_id":31125792653414,"sku":"BC3601-S","price":197.0,"currency_code":"USD","in_stock":true},{"title":"33mm Short Exhaust Valves (+1mm OS)","offer_id":31125792686182,"sku":"BC3605-S","price":197.0,"currency_code":"USD","in_stock":true},{"title":"32mm Long Exhaust Valves (OEM Size)","offer_id":31125792718950,"sku":"BC3601-LONG","price":147.81,"currency_code":"USD","in_stock":true},{"title":"33mm Long Exhaust Valves (+1mm OS)","offer_id":31125792751718,"sku":"BC3605-LONG","price":147.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0075\/8703\/7237\/products\/brian-crower-exhaust-valves-wrx-2002-2014-sti-2004-2019-valves-brian-crower-32mm-short-exhaust-valves-oem-size-bc3601-s.jpg?v=1614520699"},{"product_id":"brian-crower-29-0mm-exhaust-valves-toyota-2jzgte-lexus-2jzge","title":"Brian Crower 29.0mm Exhaust Valves Toyota 2JZGTE\/Lexus 2JZGE","description":"\u003cp\u003eBC valves are one piece design with a friction welded Satellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and\/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air\/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finish under the head.\u003c\/p\u003e","brand":"Brian Crower","offers":[{"title":"Default Title","offer_id":31125798158438,"sku":"BC3301","price":295.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0075\/8703\/7237\/products\/brian-crower-290mm-exhaust-valves-toyota-2jzgtelexus-2jzge-valves-brian-crower-bc3301.jpg?v=1614520752"},{"product_id":"brian-crower-33-6mm-intake-valves-toyota-2jzgte-lexus-2jzge","title":"Brian Crower 33.6mm Intake Valves Toyota 2JZGTE\/Lexus 2JZGE","description":"\u003cp\u003eBC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and\/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air\/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finish under the head.\u003c\/p\u003e","brand":"Brian Crower","offers":[{"title":"Default Title","offer_id":31125798256742,"sku":"BC3300","price":295.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0075\/8703\/7237\/products\/brian-crower-336mm-intake-valves-toyota-2jzgtelexus-2jzge-valves-brian-crower-bc3300.jpg?v=1614520753"},{"product_id":"brian-crower-31-30mm-standard-exhaust-valves-nissan-ka24de","title":"Brian Crower 31.30mm Standard Exhaust Valves Nissan KA24DE","description":"\u003cp\u003eBC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and\/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air\/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finish under the head.\u003c\/p\u003e","brand":"Brian Crower","offers":[{"title":"Default Title","offer_id":31125799239782,"sku":"BC3213","price":197.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0075\/8703\/7237\/products\/brian-crower-3130mm-standard-exhaust-valves-nissan-ka24de-valves-brian-crower-bc3213.jpg?v=1614520766"},{"product_id":"brian-crower-36-60mm-standard-intake-valves-nissan-ka24de","title":"Brian Crower 36.60mm Standard Intake Valves Nissan KA24DE","description":"\u003cp\u003eBC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and\/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air\/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finish under the head.\u003c\/p\u003e","brand":"Brian Crower","offers":[{"title":"Default Title","offer_id":31125799272550,"sku":"BC3212","price":197.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0075\/8703\/7237\/products\/brian-crower-3660mm-standard-intake-valves-nissan-ka24de-valves-brian-crower-bc3212.jpg?v=1614520767"},{"product_id":"brian-crower-31-80mm-5mm-exhaust-valves-nissan-ka24de","title":"Brian Crower 31.80mm +.5mm Exhaust Valves Nissan KA24DE","description":"\u003cp\u003eBC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and\/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air\/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finish under the head.\u003c\/p\u003e","brand":"Brian Crower","offers":[{"title":"Default Title","offer_id":31125799305318,"sku":"BC3211","price":197.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0075\/8703\/7237\/products\/brian-crower-3180mm-5mm-exhaust-valves-nissan-ka24de-valves-brian-crower-bc3211.jpg?v=1614520768"},{"product_id":"brian-crower-37-10mm-5mm-intake-valves-nissan-ka24de","title":"Brian Crower 37.10mm +.5mm Intake Valves Nissan KA24DE","description":"\u003cp\u003eBC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and\/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air\/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finish under the head.\u003c\/p\u003e","brand":"Brian Crower","offers":[{"title":"Default Title","offer_id":31125799403622,"sku":"BC3210","price":197.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0075\/8703\/7237\/products\/brian-crower-3710mm-5mm-intake-valves-nissan-ka24de-valves-brian-crower-bc3210.jpg?v=1614520769"},{"product_id":"brian-crower-31-15mm-exhaust-valves-1mm-nissan-sr20de-det","title":"Brian Crower 31.15mm Exhaust Valves +1mm Nissan SR20DE\/DET","description":"\u003cp\u003eBC valves are one piece design with a friction welded Satellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and\/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air\/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finish under the head.\u003c\/p\u003e","brand":"Brian Crower","offers":[{"title":"Default Title","offer_id":31125800288358,"sku":"BC3209","price":197.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0075\/8703\/7237\/products\/brian-crower-3115mm-exhaust-valves-1mm-nissan-sr20dedet-valves-brian-crower-bc3209.jpg?v=1614520784"},{"product_id":"brian-crower-30-15mm-exhaust-valves-standard-nissan-sr20de-det","title":"Brian Crower 30.15mm Exhaust Valves Standard Nissan SR20DE\/DET","description":"\u003cp\u003eBC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and\/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air\/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finish under the head.\u003c\/p\u003e","brand":"Brian Crower","offers":[{"title":"Default Title","offer_id":31125800321126,"sku":"BC3207","price":197.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0075\/8703\/7237\/products\/brian-crower-3015mm-exhaust-valves-standard-nissan-sr20dedet-valves-brian-crower-bc3207.jpg?v=1614520785"},{"product_id":"brian-crower-35-15mm-intake-valves-1mm-nissan-sr20de-det","title":"Brian Crower 35.15mm Intake Valves +1mm Nissan SR20DE\/DET","description":"\u003cp\u003eBC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and\/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air\/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finish under the head.\u003c\/p\u003e","brand":"Brian Crower","offers":[{"title":"Default Title","offer_id":31125800419430,"sku":"BC3204","price":197.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0075\/8703\/7237\/products\/brian-crower-3515mm-intake-valves-1mm-nissan-sr20dedet-valves-brian-crower-bc3204.jpg?v=1614520786"},{"product_id":"brian-crower-standard-34-15mm-intake-valves-nissan-sr20de-det","title":"Brian Crower Standard 34.15mm Intake Valves Nissan SR20DE\/DET","description":"\u003cp\u003eBC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and\/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air\/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finish under the head.\u003c\/p\u003e","brand":"Brian Crower","offers":[{"title":"Default Title","offer_id":31125800452198,"sku":"BC3200","price":197.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0075\/8703\/7237\/products\/brian-crower-standard-3415mm-intake-valves-nissan-sr20dedet-valves-brian-crower-bc3200.jpg?v=1614520787"},{"product_id":"brian-crower-31mm-exhaust-valves-honda-civic-si-2006-2011","title":"Brian Crower 31mm Exhaust Valves Honda Civic Si 2006-2011","description":"\u003cp\u003eBC valves are made from premium stainless steel, fully machined and swirl polished for precision performance. Unlike stock valves, they feature a dished head design for added weight savings and increased stability at high RPM. The undercut stem above the head area also reduces weight and significantly improves air\/fuel flow in and out of the combustion chamber. BC valves will help you get the most out of your high revving Civic Si motor!\u003c\/p\u003e\n\u003cp\u003eNote:\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eSold in sets of 8.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Brian Crower","offers":[{"title":"Default Title","offer_id":31125803401318,"sku":"BC3045","price":197.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0075\/8703\/7237\/products\/brian-crower-31mm-exhaust-valves-honda-civic-si-2006-2011-valves-brian-crower-bc3045.jpg?v=1614520816"},{"product_id":"brian-crower-30-5mm-exhaust-valves-honda-civic-si-2006-2011","title":"Brian Crower 30.5mm Exhaust Valves Honda Civic Si 2006-2011","description":"\u003cp\u003eBC valves are made from premium stainless steel, fully machined and swirl polished for precision performance. Unlike stock valves, they feature a dished head design for added weight savings and increased stability at high RPM. The undercut stem above the head area also reduces weight and significantly improves air\/fuel flow in and out of the combustion chamber. BC valves will help you get the most out of your high revving Civic Si motor!\u003c\/p\u003e\n\u003cp\u003eNote:\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eSold in sets of 8.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Brian Crower","offers":[{"title":"Default Title","offer_id":31125803499622,"sku":"BC3043","price":219.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0075\/8703\/7237\/products\/brian-crower-305mm-exhaust-valves-honda-civic-si-2006-2011-valves-brian-crower-bc3043.jpg?v=1614520817"},{"product_id":"brian-crower-30mm-exhaust-valves-honda-civic-si-2006-2011","title":"Brian Crower 30mm Exhaust Valves Honda Civic Si 2006-2011","description":"\u003cp\u003eBC valves are made from premium stainless steel, fully machined and swirl polished for precision performance. Unlike stock valves, they feature a dished head design for added weight savings and increased stability at high RPM. The undercut stem above the head area also reduces weight and significantly improves air\/fuel flow in and out of the combustion chamber. BC valves will help you get the most out of your high revving Civic Si motor!\u003c\/p\u003e\n\u003cp\u003eNote:\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eSold in sets of 8.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Brian Crower","offers":[{"title":"Default Title","offer_id":31125803565158,"sku":"BC3041","price":197.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0075\/8703\/7237\/products\/brian-crower-30mm-exhaust-valves-honda-civic-si-2006-2011-valves-brian-crower-bc3041.jpg?v=1614520818"},{"product_id":"brian-crower-36mm-intake-valves-honda-civic-si-2006-2011","title":"Brian Crower 36mm Intake Valves Honda Civic Si 2006-2011","description":"\u003cp\u003eBC valves are made from premium stainless steel, fully machined and swirl polished for precision performance. Unlike stock valves, they feature a dished head design for added weight savings and increased stability at high RPM. The undercut stem above the head area also reduces weight and significantly improves air\/fuel flow in and out of the combustion chamber. BC valves will help you get the most out of your high revving Civic Si motor!\u003c\/p\u003e\n\u003cp\u003eNote:\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eSold in sets of 8.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Brian Crower","offers":[{"title":"Default Title","offer_id":31125803597926,"sku":"BC3044","price":197.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0075\/8703\/7237\/products\/brian-crower-36mm-intake-valves-honda-civic-si-2006-2011-valves-brian-crower-bc3044.jpg?v=1614520819"},{"product_id":"brian-crower-35-5mm-intake-valves-honda-civic-si-2006-2011","title":"Brian Crower 35.5mm Intake Valves Honda Civic Si 2006-2011","description":"\u003cp\u003eBC valves are made from premium stainless steel, fully machined and swirl polished for precision performance. Unlike stock valves, they feature a dished head design for added weight savings and increased stability at high RPM. The undercut stem above the head area also reduces weight and significantly improves air\/fuel flow in and out of the combustion chamber. BC valves will help you get the most out of your high revving Civic Si motor!\u003c\/p\u003e\n\u003cp\u003eNote:\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eSold in sets of 8.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Brian Crower","offers":[{"title":"Default Title","offer_id":31125803663462,"sku":"BC3042","price":219.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0075\/8703\/7237\/products\/brian-crower-355mm-intake-valves-honda-civic-si-2006-2011-valves-brian-crower-bc3042.jpg?v=1614520820"},{"product_id":"brian-crower-35mm-intake-valves-honda-civic-si-2006-2011","title":"Brian Crower 35mm Intake Valves Honda Civic Si 2006-2011","description":"\u003cp\u003eBC valves are made from premium stainless steel, fully machined and swirl polished for precision performance. Unlike stock valves, they feature a dished head design for added weight savings and increased stability at high RPM. 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They have taken 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\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003eThey have also adjusted the Keeper grove to properly balance intake and exhaust spring pressures to reduce the use of valve spring shims and maximize performance from their spring and retainer kits.\u003c\/p\u003e\n\u003cp\u003eValves will work with an OEM keeper\/lock or when available their upgraded 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\/p\u003e\n\u003cp\u003eHere are more key features:\u003c\/p\u003e\n\u003cp\u003eValve Features:\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\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\u003eFully nitrated ( this includes the 45 which increases valve life and makes a better seal at the valve seat for improved cylinder pressure) also reduces carbon buildup on the backside of the valve.\u003c\/li\u003e\n\u003cli\u003eIntake valves are a modified 21-4n stainless and Exhausts 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\u003eValve tip lengths. They have taken 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\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003eThey have also adjusted the Keeper grove to properly balance intake and exhaust spring pressures to reduce the use of valve spring shims and maximize performance from their spring and retainer kits.\u003c\/p\u003e\n\u003cp\u003eValves will work with an OEM keeper\/lock or when available their upgraded keeper\/lock. 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In addition, head dish is maximized for weight savings while swirl polished and back cut heads promote better air flow without sacrificing durability.\u003c\/p\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":31548351938662,"sku":"2053-12","price":401.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0075\/8703\/7237\/products\/gsc-p-d-chrome-polished-super-alloy-exhaust-valve-3315mm-head-1mm-set-12-nissan-vr38dett-valves-gsc-power-division-2053-12.jpg?v=1614541919"},{"product_id":"gsc-p-d-chrome-polished-super-alloy-exhaust-valve-29mm-head-std-set-12-toyota-2jz-gte","title":"GSC P-D Chrome Polished Super Alloy Exhaust Valve - 29mm Head | STD - SET 12 - Toyota 2JZ-GTE","description":"\u003cp\u003eGSC Power-Division is expanding its already successful valve line to now include a Super Alloy Exhaust valve. The new Super Alloy Exhaust valves were designed for engines used in extreme conditions. 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