{"product_id":"forged-piston-and-ring-set-100mm-bore-8-2-1-compression-ej257","title":"Forged Piston and Ring Set, 100mm Bore, 8.2:1 Compression, EJ257","description":"The CP Pistons SC7421-4 is a high-performance forged piston and ring set engineered to withstand the extreme demands of high-horsepower and high-boost Subaru EJ257 engine builds. Constructed from high-strength aluminum forgings, these pistons are fully CNC machined and balanced to within +\/- 1 gram to ensure precision and reliability in competitive or modified street applications.\n\nTechnically advanced, this set includes a custom skirt cam and barrel design, accumulator grooves, and double pin oilers with a force-fed oil ring. The pistons feature deep valve reliefs to accommodate high-lift camshafts and are designed specifically for +1mm valve sizes. The kit includes wrist pins and performance rings, with pin fitting included to streamline the assembly process.\n\nInstallation requires professional machining, and users should note that this product is not CARB legal and is not for sale in California. Fitment is specific to Subaru EJ257 engines, including 2004-2021 STI models and 2006-2014 WRX turbo models.","brand":"CP Pistons","offers":[{"title":"Default Title","offer_id":52664196432184,"sku":"SC7421","price":885.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/684797606.jpg?v=1784335014","url":"https:\/\/store.motormia.co\/products\/forged-piston-and-ring-set-100mm-bore-8-2-1-compression-ej257","provider":"MOTORMIA","version":"1.0","type":"link"}