{"product_id":"wiseco-subaru-ej257-wrx-sti-4v-dish-19cc-100mm-piston-shelf-stock-kit-1","title":"Wiseco Subaru EJ257 WRX\/STI 4v Dish -19cc 100mm Piston Shelf Stock Kit","description":"\u003cdiv\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003eK598M100\u003c\/span\u003e   |   \u003cstrong\u003eUPC:\u003c\/strong\u003e 193564447906\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003ch4\u003e\u003cstrong\u003eWiseco EJ257 WRX\/STI 4v Dish -19cc 100mm Piston Kit K598M100\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe \u003cstrong\u003eWiseco K598M100\u003c\/strong\u003e forged piston shelf stock kit for 2004-2021 Subaru WRX\/STI with EJ257 2.5L turbo engine. Boost your engine's reliability and power with lightweight 2618 alloy pistons featuring -19cc dish for optimized compression in high-boost builds, complete with rings, pins, and clips for race-ready performance.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eForged 2618 Aluminum Alloy:\u003c\/strong\u003e High-tensile strength withstands extreme boost up to 40+ psi without failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e-19cc Dish Design:\u003c\/strong\u003e Precision-machined for 8.2:1 compression ratio in tuned setups, promoting detonation resistance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShelf Stock Ready:\u003c\/strong\u003e Includes premium moly rings, wrist pins, and circlips for immediate assembly and balanced operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable width=\"100%\" cellspacing=\"0\" cellpadding=\"8\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eK598M100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore Size\u003c\/td\u003e\n\u003ctd\u003e100mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDish Volume\u003c\/td\u003e\n\u003ctd\u003e-19cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompression Height\u003c\/td\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eForged 2618 Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRing Pack\u003c\/td\u003e\n\u003ctd\u003e1.2mm\/1.5mm\/2.8mm Moly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e4 Pistons + Rings, Pins, Clips\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eLimited Lifetime\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2004-2021 Subaru Impreza WRX\/STI EJ257 2.5L Turbo (non-VAB EJ255 compatible with mods)\u003c\/li\u003e\n\u003cli\u003e100mm bore for +1mm overstock\u003c\/li\u003e\n\u003cli\u003eProfessional machining required for final bore\/hone.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eInstallation Time: 8-12 hours\u003c\/li\u003e\n\u003cli\u003eDifficulty: Advanced (Professional engine builder recommended\u003c\/li\u003e\n\u003cli\u003eTools: micrometer, ring compressor, torque wrench).\u003c\/li\u003e\n\u003cli\u003eBore\/hone cylinders to 99.99-100.02mm torque rod bolts to 55 ft-lbs clear 8.5mm valves with 1.5mm deck height.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eThis Part Fits\u003c\/h4\u003e\n\u003ctable cellspacing=\"0\" cellpadding=\"8\" 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\u003eEngine\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2004-2021\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eImpreza WRX \/ STI\u003c\/td\u003e\n\u003ctd\u003eEJ257 2.5L Turbo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eWhy Choose Wiseco?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eIndustry-leading forged pistons with over 80 years of racing heritage for unmatched durability in boosted applications.\u003c\/li\u003e\n\u003cli\u003ePrecision CNC-machined for perfect fit and balance, trusted in NHRA and rally circuits worldwide.\u003c\/li\u003e\n\u003cli\u003eSEMA award-winning engineering with lifetime warranty for performance enthusiasts.\u003c\/li\u003e\n\u003c\/ul\u003e\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 What compression ratio does this kit yield? \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA:\u003c\/strong\u003e Approximately 8.2:1 with -19cc dish on EJ257 verify with head gasket and deck height.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Does it include rings and pins?\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA:\u003c\/strong\u003e Yes, complete shelf stock with moly rings, coated pins, and circlips.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Compatible with stock rods?\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA:\u003c\/strong\u003e Yes, but upgrade to forged rods for high-boost over 30 psi.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What's the bore oversize?\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA:\u003c\/strong\u003e +1mm (100mm) for refreshed or stroker builds; machine to spec.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eShipping \u0026amp; Handling\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMethod:\u003c\/strong\u003e UPS\/FedEx 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 Official Wiseco retail box\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wiseco","offers":[{"title":"Default Title","offer_id":43938050342991,"sku":"WISK598M100","price":784.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/wiseco-k598m100-01.jpg?v=1765552211","url":"https:\/\/www.blackopsautoworks.com\/products\/wiseco-subaru-ej257-wrx-sti-4v-dish-19cc-100mm-piston-shelf-stock-kit-1","provider":"Black Ops Auto Works","version":"1.0","type":"link"}