{"product_id":"manley-04-subaru-wrx-sti-ej257-std-stroke-99-5mm-std-bore-9-8-1-dish-piston-set-with-rings","title":"Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.5mm STD Bore 9.8:1 Dish Piston Set with Rings","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e612100C-4\u003c\/span\u003e | \u003cstrong\u003eUPC:\u003c\/strong\u003e 807298103617\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eManley 04+ Subaru WRX STi (EJ257) STD Stroke 99.5mm STD Bore 9.8:1 Dish Piston Set with Rings\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eManley Platinum Series piston set delivers forged strength for 2004-2012 Subaru Impreza WRX STI models with EJ257 engines. Designed with 99.5mm standard bore and standard stroke for direct fit in high-boost applications. Includes premium rings for immediate use in performance rebuilds.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2618-T61 Alloy Forgings:\u003c\/strong\u003e High-strength material withstands extreme turbo pressures and heat cycles in EJ257 builds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccumulator Groove:\u003c\/strong\u003e Prevents ring flutter at high RPM for consistent sealing and power delivery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Skirt Profiles:\u003c\/strong\u003e Cam and barrel shapes reduce friction and noise while improving ring seal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoly Skirt Coating:\u003c\/strong\u003e Lowers wear on cylinder walls and enhances break-in process.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Steel Wrist Pins:\u003c\/strong\u003e H13 HRC 38-44 hardness with C45 circlips for secure retention under boost.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eRings are pre-gapped and matched to pistons for Subaru EJ257 specifications.\u003c\/li\u003e\n\u003cli\u003eSet includes 4 pistons with pins and rings. compression height 30.8mm.\u003c\/li\u003e\n\u003cli\u003eShipping box dimensions 8 x 6 x 6 inches. net weight 4.2 lbs (392g per piston).\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\u003eCylinder hone to 99.50-99.51mm. check piston-to-wall clearance at 0.003-0.004 inch.\u003c\/li\u003e\n\u003cli\u003eBalance rotating assembly. use assembly lube on skirts and pins.\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\u003e2006-2012\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eImpreza\u003c\/td\u003e\n\u003ctd\u003eWRX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2006-2007,2010-2012\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eImpreza\u003c\/td\u003e\n\u003ctd\u003eWRX Limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2009-2012\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eImpreza\u003c\/td\u003e\n\u003ctd\u003eWRX Premium\u003c\/td\u003e\n\u003c\/tr\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\u003e2007,2011-2012\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\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\u003e2006-2007\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eImpreza\u003c\/td\u003e\n\u003ctd\u003eWRX TR\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\u003eProven in WRX STI race engines from drag to rally applications.\u003c\/li\u003e\n\u003cli\u003eExact tolerances ensure reliable boost handling up to 40psi.\u003c\/li\u003e\n\u003cli\u003eHand-built in USA with FEA-optimized designs for EJ257.\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 2004-2007 WRX STI with EJ257?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Yes, direct replacement for 99.5mm bore STD stroke EJ257 in all listed 2004-2012 STI models.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What ring set is included?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Manley 61556-4 rings with CBN hone grooves, pre-gapped to 0.012-0.022 inch specs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What warranty covers these pistons?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Limited lifetime warranty against manufacturing defects when installed by certified builder.\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 Foam-protected box 8x6x6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 6 lbs shipping weight\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Manley Performance","offers":[{"title":"Default Title","offer_id":41147022704719,"sku":"MAN612100C-4","price":741.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/products\/manley-04-subaru-wrx-sti-ej257-std-stroke-99_5mm-std-bore-9_81-dish-piston-set-with-rings-manley-performance.jpg?v=1772547963","url":"https:\/\/www.blackopsautoworks.com\/products\/manley-04-subaru-wrx-sti-ej257-std-stroke-99-5mm-std-bore-9-8-1-dish-piston-set-with-rings","provider":"Black Ops Auto Works","version":"1.0","type":"link"}