{"product_id":"gsc-p-d-4b11t-chrome-polished-super-alloy-exhaust-valve-30mm-head-1mm-set-8","title":"GSC P-D 4B11T Chrome Polished Super Alloy Exhaust Valve - 30mm Head (+1mm) - SET 8","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e2027-8\u003c\/span\u003e\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eGSC P-D 4B11T Chrome Polished Super Alloy Exhaust Valve - 30mm Head (+1mm) - SET 8 | 2008-2015 Mitsubishi Lancer Evolution X\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eGSC Power-Division exhaust valves deliver reliable performance for 4B11T engines in the 2008-2015 Mitsubishi Lancer Evolution X. This set of 8 features 30mm head diameter and +1mm stem length for better exhaust evacuation and compatibility with aggressive cam profiles. Built to endure high boost and RPM in modified turbo setups.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuper Alloy Material:\u003c\/strong\u003e Forged one-piece design resists fatigue and handles temperatures over 2200°F for long-term durability in forced induction applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChrome Polished Finish:\u003c\/strong\u003e Improves heat dissipation from the valve head and minimizes stem friction for smoother operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e30mm Head Diameter:\u003c\/strong\u003e +1mm sizing optimizes exhaust flow while maintaining velocity for responsive power gains\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e+1mm Stem Length:\u003c\/strong\u003e 110.50mm overall length supports high-lift camshafts without clearance issues\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Specs:\u003c\/strong\u003e 5.95mm stem diameter and 4.90mm head thickness ensure drop-in fit with OEM guides and seats\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003ePair with GSC valve springs 4403-8 for high-RPM reliability\u003c\/li\u003e\n\u003cli\u003eInspect valve guides during installation for wear\u003c\/li\u003e\n\u003cli\u003eShips in protective foam-lined box to prevent damage\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\u003eLap valves for perfect seal using three-angle seats\u003c\/li\u003e\n\u003cli\u003eCompatible with OEM retainers and GSC titanium retainers\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\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 drag racing and time attack builds\u003c\/li\u003e\n\u003cli\u003eUSA-manufactured with CNC machining for consistency\u003c\/li\u003e\n\u003cli\u003eTested to exceed stock valve limits under 40+ psi boost\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 Do these valves fit stock 4B11T cylinder heads?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Yes direct OEM replacement for all 2008-2015 Evo X 4B11T heads with no modifications needed\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 chrome layer on head and stem accelerates heat transfer away from combustion chamber and cuts wear\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Are upgraded springs required?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Stock springs work for mild builds but upgrade to GSC 4403-8 for cams over 272 duration or 30 psi boost\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 Foam-protected set box 6 x 4 x 2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.7 lbs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GSC Power Division","offers":[{"title":"Default Title","offer_id":40341598175311,"sku":"GSC2027-8","price":257.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/Screenshot2024-06-04at1.02.45PM.png?v=1717520573","url":"https:\/\/www.blackopsautoworks.com\/products\/gsc-p-d-4b11t-chrome-polished-super-alloy-exhaust-valve-30mm-head-1mm-set-8","provider":"Black Ops Auto Works","version":"1.0","type":"link"}