{"product_id":"manley-04-subaru-wrx-sti-ej257-99-75mm-bore-1-2mm-x-1-2mm-x-2-0mm-25mm-oversized-ring-set","title":"Manley 04+ Subaru WRX\/STi (EJ257) 99.75mm Bore 1.2mm x 1.2mm x 2.0mm +.25mm Oversized Ring Set","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e46997-4\u003c\/span\u003e | \u003cstrong\u003eUPC:\u003c\/strong\u003e 807298041155\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eManley 2004+ Subaru WRX\/STI (EJ257) 99.75mm Bore 1.2mm x 1.2mm x 2.0mm +.25mm Oversized Ring Set\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThis Manley piston ring set fits 2004-2021 Subaru WRX\/STI models equipped with EJ257 turbo engines after boring cylinders to 99.75mm. The 1.2mm x 1.2mm x 2.0mm configuration ensures precise cylinder sealing and effective oil control in engines handling elevated boost levels and RPM. Engine builders rely on these rings for rebuilt turbo setups that withstand intense performance demands.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTop Ring:\u003c\/strong\u003e High tensile strength steel with hard chrome face resists scuffing and holds seal integrity under high cylinder pressures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecond Ring:\u003c\/strong\u003e Reverse bevel nitrided ductile iron promotes heat transfer and cuts friction for smoother operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil Ring:\u003c\/strong\u003e Three-piece design with steel top rail expander and flex-vent side rails meters oil consistently across all conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOversize Bore:\u003c\/strong\u003e 99.75mm (+.25mm) dimension matches overbored EJ257 blocks and coordinates with Manley pistons for exact fit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Specific:\u003c\/strong\u003e Designed exclusively for Subaru EJ257 turbo engines with optimized tension and gap settings for reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eRings require end gap verification and filing to engine builder specifications for best results\u003c\/li\u003e\n\u003cli\u003eBest paired with forged pistons in high compression or boosted configurations\u003c\/li\u003e\n\u003cli\u003ePackaged to arrive undamaged and ready for inspection\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\u003eSet ring end gaps to 0.004-0.005 inch per inch of bore for top ring and follow specs for others\u003c\/li\u003e\n\u003cli\u003eWorks with OEM heads gaskets and aftermarket pistons at 99.75mm bore diameter\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\u003e2004-2012\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\u003e2004-2007\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eImpreza\u003c\/td\u003e\n\u003ctd\u003eWRX STI hatchback\/sedan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2007\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eImpreza\u003c\/td\u003e\n\u003ctd\u003eWRX STI Limited\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 hatchback\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2010\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eImpreza\u003c\/td\u003e\n\u003ctd\u003eWRX STI Special Edition\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2011-2012\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eImpreza\u003c\/td\u003e\n\u003ctd\u003eWRX STI Limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2013-2014\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\u003c\/td\u003e\n\u003ctd\u003eSTI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhy Choose Manley?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eOver 30 years crafting engine parts for motorsports\u003c\/li\u003e\n\u003cli\u003eBuilt in USA facilities with tight tolerances for reliability\u003c\/li\u003e\n\u003cli\u003eUsed in championship winning Subaru race engines\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 Does this fit all EJ257 engines in 2004+ STI models?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Yes for 2004-2021 Impreza WRX STI variants with EJ257 when cylinders are bored to 99.75mm\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 is chrome faced steel second is nitrided ductile iron oil ring uses steel and flex vent components\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What warranty applies and install tips?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Limited manufacturer defect warranty always gap rings precisely and torque to spec during assembly\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\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 5 x 5 x 1 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.65 lbs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Manley Performance","offers":[{"title":"Default Title","offer_id":43725614350415,"sku":"MAN46997-4","price":164.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/manley-04-subaru-wrxsti-ej257-99_75mm-bore-1_2mm-x-1_2mm-x-2_0mm-_25mm-oversized-ring-set-manley-performance.jpg?v=1767413650","url":"https:\/\/www.blackopsautoworks.com\/products\/manley-04-subaru-wrx-sti-ej257-99-75mm-bore-1-2mm-x-1-2mm-x-2-0mm-25mm-oversized-ring-set","provider":"Black Ops Auto Works","version":"1.0","type":"link"}