{"product_id":"manley-subaru-ej257-99-5-grade-b-bore-8-5-1-17cc-dish-platinum-series-piston-single-piston","title":"Manley Subaru EJ257 99.5 Grade B Bore 8.5:1 -17cc Dish Platinum Series Piston (Single Piston)","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e612200CB-1\u003c\/span\u003e | \u003cstrong\u003eUPC:\u003c\/strong\u003e 807298107837\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eManley Subaru EJ257 99.5 Grade B Bore 8.5:1 -17cc Dish Platinum Series Piston for 2004-2021 WRX STI (Single Piston)\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eManley Platinum Series pistons deliver reliable performance for Subaru EJ257 2.5L turbo engines in 2004-2021 WRX STI models. This single piston offers 99.5mm Grade B bore sizing and -17cc dish volume for 8.5:1 compression ratio with stock 60cc heads. Ideal for high-boost builds with proven 2618 alloy construction and moly skirt coatings.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2618-T6 Forged Aluminum:\u003c\/strong\u003e High-tensile alloy withstands extreme boost pressures and heat in turbocharged EJ257 applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e99.5mm Grade B Bore -17cc Dish:\u003c\/strong\u003e Precision sized for STI blocks delivering 8.5:1 compression ratio on pump gas setups\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoly Skirt Coating:\u003c\/strong\u003e Minimizes friction galling and scuffing for smoother operation and extended service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Steel Wrist Pin:\u003c\/strong\u003e Heavy-duty 23mm x 39.7mm pin rated for high-rpm loads with 122g weight\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Skirt and Cam Profiles:\u003c\/strong\u003e Ensures proper piston-to-wall clearance quiet running and balanced dynamics\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSold as single piston. purchase four for complete STI engine rebuild\u003c\/li\u003e\n\u003cli\u003eIncludes performance ring pack: 1.2mm\/1.5mm\/2.8mm sizes with moly top ring\u003c\/li\u003e\n\u003cli\u003eCompression height 30mm suits 79mm stroke and 130.5mm rods\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\u003eHone cylinders to 99.5mm Grade B specifications before install\u003c\/li\u003e\n\u003cli\u003eUses standard STI connecting rods. balance assembly required\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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhy Choose Manley?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eRelied on by professional engine builders and tuners worldwide\u003c\/li\u003e\n\u003cli\u003eTrack-proven durability in racing and street performance\u003c\/li\u003e\n\u003cli\u003ePrecision CNC-machined components for exact fitment and balance\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 STI engines?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Yes fits 2004-2021 Subaru WRX STI models with EJ257 2.5L turbo engines stock bore refreshed blocks\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What is the piston weight and material?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e 392 grams forged 2618-T6 aluminum alloy with 392g piston weight excluding 122g pin\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Are rings and wrist pin included?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Yes includes tool steel wrist pin and complete ring set pre-gapped for 99.5mm bore\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 Individual protective box 6 x 6 x 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.90 lbs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Manley Performance","offers":[{"title":"Default Title","offer_id":41147024146511,"sku":"MAN612200CB-1","price":199.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/products\/manley-subaru-ej257-99_5-grade-b-bore-8_51-17cc-dish-platinum-series-piston-single-piston-manley-performance.jpg?v=1772547993","url":"https:\/\/www.blackopsautoworks.com\/products\/manley-subaru-ej257-99-5-grade-b-bore-8-5-1-17cc-dish-platinum-series-piston-single-piston","provider":"Black Ops Auto Works","version":"1.0","type":"link"}