{"product_id":"cp-ring-only-for-sc7021-pistons","title":"CP Ring ONLY for SC7021 Pistons","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003eCPN-3327\u003c\/span\u003e\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eCP Ring Pack for SC7021 Pistons Subaru STI 2004-2021\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eCP CPN-3327 ring pack provides exact fit for SC7021 pistons in Subaru WRX STI EJ257 engines. Built for 2004-2021 models this set ensures reliable compression sealing during extreme boost and high RPM. Perfect for engine rebuilds that demand consistent power delivery and durability.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExact Piston Match:\u003c\/strong\u003e Sized for 99.75mm bore SC7021 pistons ensures zero gap issues and full face contact\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChrome Faced Top Ring:\u003c\/strong\u003e 1.2mm steel ring with chrome plating reduces friction and resists blow-by in turbo applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNitrided Second Ring:\u003c\/strong\u003e 1.5mm cast iron construction wears slowly maintains seal during high heat cycles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlex-Vent Oil Ring:\u003c\/strong\u003e 2.8mm three-piece design controls oil effectively minimizes drag for freer revving\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-Honed Finish:\u003c\/strong\u003e Factory gaps set to Subaru specs 0.45-0.55mm top ring for quick break-in and long life\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eRings only pistons SC7021 sold separately verify bore before install\u003c\/li\u003e\n\u003cli\u003eStore in dry area avoid contamination prior to assembly\u003c\/li\u003e\n\u003cli\u003eCompact packaging protects rings 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\u003eUse CP-specific ring expander tools to avoid ring damage\u003c\/li\u003e\n\u003cli\u003eCompatible with stock wrist pins and circlips from SC7021 kit\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\u003e2004-2007\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eImpreza\u003c\/td\u003e\n\u003ctd\u003eWRX STI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2008-2014\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eImpreza\u003c\/td\u003e\n\u003ctd\u003eWRX STI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2015-2021\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eWRX STI\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2015-2021\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eImpreza WRX STI\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhy Choose CP-Carrillo?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eProven in NHRA Top Fuel and Pro Stock racing teams worldwide\u003c\/li\u003e\n\u003cli\u003eForged from 2618 T6 aluminum with advanced coatings\u003c\/li\u003e\n\u003cli\u003eUSA-made with tolerances held to 0.0002 inches\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 CPN-3327 fit 2017 STI EJ257?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Yes matches all 2004-2021 EJ257 blocks with 99.75mm SC7021 pistons including sedan hatchback variants\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What ring materials are used?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Top ring steel chrome faced second cast iron nitrided oil control flex-vent steel for balanced wear and sealing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What warranty applies?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e CP-Carrillo offers limited lifetime warranty on rings against manufacturing defects when installed correctly\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 USPS Priority\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 Protective box 6 x 4 x 1 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.5 lbs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CP Pistons","offers":[{"title":"Default Title","offer_id":43759433154639,"sku":"CPPCPN-3327","price":30.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/cp-ring-only-for-sc7021-pistons-cp-pistons.jpg?v=1767415406","url":"https:\/\/www.blackopsautoworks.com\/products\/cp-ring-only-for-sc7021-pistons","provider":"Black Ops Auto Works","version":"1.0","type":"link"}