{"product_id":"gsc-p-d-4b11t-chrome-polished-super-alloy-exhaust-valve-29mm-head-std-set-8","title":"GSC P-D 4B11T Chrome Polished Super Alloy Exhaust Valve - 29mm Head (STD) - SET 8","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e2025-8\u003c\/span\u003e\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eGSC P-D 4B11T Chrome Polished Super Alloy Exhaust Valve - 29mm Head (STD) - SET 8 for 2008-2015 Mitsubishi Lancer Evolution X\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eEquip your 2008-2015 Mitsubishi Lancer Evolution X with the GSC P-D 4B11T exhaust valve set featuring 29mm standard head diameter and chrome polished super alloy construction. This complete set of 8 valves delivers reliable performance in high-boost and high-RPM applications for the 4B11T engine. Direct replacement enhances exhaust flow and withstands extreme heat cycles.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuper Alloy Construction:\u003c\/strong\u003e High-nickel Inconel-style alloy forged as one piece resists fatigue and maintains shape at temperatures over 1600°F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChrome Polished Stems:\u003c\/strong\u003e Mirror finish on 7.98mm stems cuts friction by 40% reduces guide wear and improves heat transfer to valve guides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e29mm Head Diameter:\u003c\/strong\u003e Standard sizing preserves OEM port flow while adding strength for larger cams and turbo upgrades\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Valve Length:\u003c\/strong\u003e 120.20mm overall length with 7.98mm tip ensures proper seal depth and spring retention in stock or ported heads\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Tolerances:\u003c\/strong\u003e Stem held to +\/- 0.0005 inches for drop-in fit and zero radial runout supporting valve train stability above 9000 RPM\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eReplace valve seals and guides during installation for optimal sealing\u003c\/li\u003e\n\u003cli\u003eInspect retainer and spring compatibility with aftermarket cams\u003c\/li\u003e\n\u003cli\u003ePackaged in foam-lined box 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\u003eValve stem 7.98mm requires matching bronze guides for high boost\u003c\/li\u003e\n\u003cli\u003eNo additional hardware needed uses factory retainers and seats\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 X\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 X\u003c\/td\u003e\n\u003ctd\u003eMR\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 X\u003c\/td\u003e\n\u003ctd\u003eMR Final Edition\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 X\u003c\/td\u003e\n\u003ctd\u003eAll 4B11T\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\u003eRace-proven in Evo X drag and time attack classes worldwide\u003c\/li\u003e\n\u003cli\u003eEngineered and tested on 40+ PSI boosted 4B11T dynos\u003c\/li\u003e\n\u003cli\u003eUSA-assembled with Japanese forging for consistent quality\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 my 2010 Evo X GSR?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Yes direct OEM replacement for all 2008-2015 Lancer Evolution X models equipped with the 4B11T 2.0L turbo engine\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What makes the chrome polish different from stock?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Polished stems dissipate heat faster and reduce oil consumption by minimizing guide clearance wear over 50k miles of track use\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Do I need upgraded springs with these valves?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Stock springs work for mild builds pair with GSC springs for cams over 11mm lift or boost above 30 PSI\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 shipping\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 Foam inserts in 10x6x2 inch box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.8 lbs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":40341598142543,"sku":"GSC2025-8","price":251.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/gsc-p-d-4b11t-chrome-polished-super-alloy-exhaust-valve-29mm-head-std-set-8-valves-gsc-power-division.jpg?v=1717520428","url":"https:\/\/www.blackopsautoworks.com\/products\/gsc-p-d-4b11t-chrome-polished-super-alloy-exhaust-valve-29mm-head-std-set-8","provider":"Black Ops Auto Works","version":"1.0","type":"link"}