{"product_id":"manley-04-subaru-wrx-sti-eh257-99-50mm-std-grade-b-bore-8-5-1-dish-piston-single-piston","title":"Manley 04+ Subaru WRX\/STI EH257 99.50mm STD (Grade B) Bore 8.5:1 Dish Piston (SINGLE PISTON)","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e632200CB-1\u003c\/span\u003e | \u003cstrong\u003eUPC:\u003c\/strong\u003e 807298085890\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eManley 04+ Subaru WRX\/STI EH257 99.50mm STD (Grade B) Bore 8.5:1 Dish Piston (SINGLE PISTON)\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eEquip your 2004 and later Subaru WRX and STI with this Manley Platinum Series piston designed for EH257 2.5L turbo engines. The 99.50mm standard bore and 8.5:1 dish deliver precise compression for boosted setups while handling high RPM and power levels. Engine builders choose this single piston for its strength in demanding race and street applications.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2618 Alloy Forging:\u003c\/strong\u003e Provides high tensile strength and resistance to detonation under extreme boost pressures common in WRX\/STI builds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProven Cam and Barrel Skirt Profiles:\u003c\/strong\u003e Minimize friction and wear for smoother operation and longer engine life in high-performance turbo applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Steel Wrist Pins:\u003c\/strong\u003e Offer superior durability and reduced weight compared to standard pins, supporting aggressive tuning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoly Skirt Coating:\u003c\/strong\u003e Prevents scuffing and galling during break-in and operation, ensuring reliable piston-to-wall contact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e99.50mm STD Bore (Grade B):\u003c\/strong\u003e Matches factory dimensions with minor cosmetic imperfections that do not affect function or performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSold as single piston. order four for complete engine set with matching bores.\u003c\/li\u003e\n\u003cli\u003eCompression height 30.25mm. pin diameter 22mm x 60.5mm long.\u003c\/li\u003e\n\u003cli\u003eShips in protective packaging to prevent damage. piston weight 445 grams.\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\u003eRings, pins, and clips sold separately. use Manley rings for best results.\u003c\/li\u003e\n\u003cli\u003eRequires cylinder honing to 99.50mm. check clearances per engine builder specs.\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\u003c\/td\u003e\n\u003ctd\u003eSTI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2006-2014\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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhy Choose Manley?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eTrusted by pro engine builders for Subaru turbo engines worldwide.\u003c\/li\u003e\n\u003cli\u003eForged construction withstands 1000+ horsepower levels reliably.\u003c\/li\u003e\n\u003cli\u003ePrecision CNC machining ensures consistent ring grooves 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 Will this piston fit my 2004 Subaru STI EJ257 engine?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Yes, it directly fits 2004-2021 WRX\/STI models with 99.50mm bores including EJ257 and compatible EJ255 turbo engines after measuring.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What material is used and what is the exact weight?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Made from high-strength 2618 T6 aluminum alloy. each piston weighs 445 grams for balanced rotating assembly.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What warranty applies and are rings included?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Backed by Manley one-year unlimited mileage warranty. rings not included, sold separately for custom gap setups.\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 Compact box 4in x 4in x 4in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.8 lbs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Manley Performance","offers":[{"title":"Default Title","offer_id":41147033780303,"sku":"MAN632200CB-1","price":202.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/products\/manley-04-subaru-wrxsti-eh257-99_50mm-std-grade-b-bore-8_51-dish-piston-single-piston-manley-performance.jpg?v=1772548267","url":"https:\/\/www.blackopsautoworks.com\/products\/manley-04-subaru-wrx-sti-eh257-99-50mm-std-grade-b-bore-8-5-1-dish-piston-single-piston","provider":"Black Ops Auto Works","version":"1.0","type":"link"}