{"product_id":"cp-piston-ring-set-for-mitsubishi-4b11-evo-x-bore-86-5mm-size-0-5mm-compression-ratio","title":"CP Piston \u0026 Ring Set for Mitsubishi 4B11 Evo X - Bore (86.5mm) - Size (+0.5mm) - Compression Ratio (","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003eSC7221-4\u003c\/span\u003e\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eCP Piston \u0026amp; Ring Set Mitsubishi 4B11 Evo X 2008-2015 Bore 86.5mm +0.5mm CR 9.2:1\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThis CP forged piston and ring set upgrades Mitsubishi 4B11 engines in 2008-2015 Lancer Evolution X models. Bore size of 86.5mm (+0.5mm oversize) supports larger displacement for more power while maintaining durability under boost. Includes matched rings for quick break-in and long-term sealing in street or track use.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eForged 2618 Alloy:\u003c\/strong\u003e High-strength material handles extreme cylinder pressures and temperatures in turbocharged applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccumulator Groove:\u003c\/strong\u003e Controls combustion chamber pressure to resist detonation and extend engine life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSkirt and Dome Coatings:\u003c\/strong\u003e Reduces friction wear and promotes heat dissipation for consistent performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Ring Grooves:\u003c\/strong\u003e Designed for low-tension rings to improve sealing blowby and oil control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalanced Set with Rings:\u003c\/strong\u003e Precision-machined 4-piston set with premium rings arrives ready for professional installation each piston weighs 382 grams\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eRequires block boring and decking to 86.5mm bore by certified machine shop\u003c\/li\u003e\n\u003cli\u003eRings arrive pre-gapped verify and adjust final gaps during assembly\u003c\/li\u003e\n\u003cli\u003eShips in protective foam packaging 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\u003eResize connecting rods and check rod bearings before assembly\u003c\/li\u003e\n\u003cli\u003eHone cylinders to match CP-spec finish for optimal ring seal\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\u003c\/td\u003e\n\u003ctd\u003eEvolution GSR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2009-2015\u003c\/td\u003e\n\u003ctd\u003eMitsubishi\u003c\/td\u003e\n\u003ctd\u003eLancer\u003c\/td\u003e\n\u003ctd\u003eEvolution MR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhy Choose CP Pistons?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eProven in professional racing with multiple championships\u003c\/li\u003e\n\u003cli\u003eEvery piston CNC-machined in the USA for exact tolerances\u003c\/li\u003e\n\u003cli\u003eBacked by extensive dyno testing for 4B11 applications\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 this fit all Evo X 4B11 engines?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Yes fits 2008-2015 Lancer Evolution X GSR and MR models with stock stroke 4B11T confirm bore size before purchase\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What material are the pistons made from?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Forged from 2618 T6 aluminum alloy for strength and light weight each piston weighs 382 grams\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What warranty is provided?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Limited lifetime warranty against manufacturing defects when installed by qualified technician\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 UPS Ground or FedEx\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 Secure box measures 12 x 8 x 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 5 lbs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CP Pistons","offers":[{"title":"Default Title","offer_id":43720402305103,"sku":"CPPSC7221-4","price":885.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/cp-piston-ring-set-for-mitsubishi-4b11-evo-x-bore-86_5mm-size-0_5mm-compression-ratio-cp-pistons.jpg?v=1769628094","url":"https:\/\/www.blackopsautoworks.com\/products\/cp-piston-ring-set-for-mitsubishi-4b11-evo-x-bore-86-5mm-size-0-5mm-compression-ratio","provider":"Black Ops Auto Works","version":"1.0","type":"link"}