{"product_id":"gsc-p-d-4b11t-21-4n-chrome-polished-intake-valve-36mm-head-1mm-set-8","title":"GSC P-D 4B11T 21-4N Chrome Polished Intake Valve - 36mm Head (+1mm) - SET 8","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e2024-8\u003c\/span\u003e\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eGSC P-D 4B11T 21-4N Chrome Polished Intake Valve - 36mm Head (+1mm) - SET 8 for 2008-2016 Mitsubishi Lancer Evolution X\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eGSC Power-Division intake valves deliver precise engineering for the Mitsubishi 4B11T engine in Lancer Evolution X models from 2008 to 2016. This set of 8 features a 36mm head diameter +1mm over stock for greater airflow volume alongside 21-4N stainless construction that handles high boost and RPM. Chrome polishing reduces friction for reliable sealing and extended service life in performance setups.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e36mm Head Diameter (+1mm O\/S):\u003c\/strong\u003e Increases intake flow capacity by larger port matching to support 500+ whp builds without restricting air velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e21-4N Stainless Steel:\u003c\/strong\u003e High-nickel alloy resists fatigue and heat up to 1600°F ideal for turbocharged 4B11T applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChrome Polished Finish:\u003c\/strong\u003e Lowers valve guide wear by 50% and enhances seat life through smoother surface and better lubrication retention\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5.96mm Stem \/ 104.60mm Length:\u003c\/strong\u003e Matches OEM geometry for drop-in stem fit with upgraded springs while maintaining valve train stability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Set of 8:\u003c\/strong\u003e Full intake replacement ensures balanced flow across all cylinders for even power delivery\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eValve seat machining required for +1mm oversized head to achieve proper interference fit\u003c\/li\u003e\n\u003cli\u003eInspect valve guides for wear before installation and consider bronze guides for extreme builds\u003c\/li\u003e\n\u003cli\u003ePackaged in individual protective sleeves to prevent damage during transit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eProfessional installation recommended.\u003c\/li\u003e\n\u003cli\u003eMachine valve seats 0.5-1.0mm for 36mm head using multi-angle cutter for optimal flow\u003c\/li\u003e\n\u003cli\u003eCompatible with OEM retainers and GSC valve springs part 2003 or equivalents\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eThis Part Fits\u003c\/h4\u003e\n\u003ctable border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eSubmodel\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2008-2015\u003c\/td\u003e\n\u003ctd\u003eMitsubishi\u003c\/td\u003e\n\u003ctd\u003eLancer Evolution\u003c\/td\u003e\n\u003ctd\u003eGSR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2008-2015\u003c\/td\u003e\n\u003ctd\u003eMitsubishi\u003c\/td\u003e\n\u003ctd\u003eLancer Evolution\u003c\/td\u003e\n\u003ctd\u003eMR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2015\u003c\/td\u003e\n\u003ctd\u003eMitsubishi\u003c\/td\u003e\n\u003ctd\u003eLancer Evolution\u003c\/td\u003e\n\u003ctd\u003eFinal Edition\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2009-2014\u003c\/td\u003e\n\u003ctd\u003eMitsubishi\u003c\/td\u003e\n\u003ctd\u003eLancer\u003c\/td\u003e\n\u003ctd\u003eRalliart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhy Choose GSC Power-Division?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eProven in NHRA drag racing and NASA time attack with multiple championship teams\u003c\/li\u003e\n\u003cli\u003eCNC machined in the USA with tolerances under 0.0005 inches for repeatability\u003c\/li\u003e\n\u003cli\u003eBacked by defect warranty when installed by certified shops\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Will these valves fit all 2008-2015 Mitsubishi Evo X models?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Yes they directly fit GSR MR and Final Edition submodels with the stock 4B11T cylinder head along with 2009-2014 Lancer Ralliart\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What makes the chrome polish different from standard valves?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Chrome polish creates a harder micro-finish that cuts guide wear and improves heat transfer for consistent performance over 100k miles\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Do I need new valve springs with these?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Stock springs work for mild builds under 350whp but upgrade to GSC springs for 400+whp to control float at 9000+RPM\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eShipping \u0026amp; Handling\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMethod:\u003c\/strong\u003e Standard ground\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e In stock - ships same or next business day\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Individual sleeves in 6 x 4 x 2 inch box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.95 lbs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":40341598109775,"sku":"GSC2024-8","price":174.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/Screenshot2024-06-04at1.02.00PM.png?v=1717520530","url":"https:\/\/www.blackopsautoworks.com\/products\/gsc-p-d-4b11t-21-4n-chrome-polished-intake-valve-36mm-head-1mm-set-8","provider":"Black Ops Auto Works","version":"1.0","type":"link"}