{"product_id":"cp-pistons-04-12-impreza-ej257-piston-and-ring-set-99-5mm-bore-standard-size-8-2-1-cr-cppsc7420-4","title":"CP Pistons [04-12 Impreza] EJ257 Piston and Ring Set - 99.5mm Bore, Standard Size, 8.2:1 CR - cppSC7420-4","description":"CP Piston \u0026amp; Ring Set for Subaru EJ257 WRX STi - Bore (99.5mm) - Size (Standard) - CR (8.2)\n\u003cp\u003eThe CP Pistons cppSC7420-4 piston and ring set is designed for Subaru Impreza models equipped with the EJ257 engine. This set features a 99.5mm bore, standard sizing, and an 8.2:1 compression ratio for applications requiring a purpose-built replacement or performance-oriented piston assembly.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Subaru Impreza with EJ257 engine\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e 99.5mm bore, standard size, 8.2:1 compression ratio\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eManufactured by CP Pistons, this set combines pistons and matching rings for a coordinated engine rebuild. The standard-size specification is intended for compatible bores that remain within the manufacturer's service requirements, while the 8.2:1 compression ratio supports forced-induction applications where compression characteristics are an important part of the engine setup. Verify cylinder condition, clearances, ring gaps, and all supporting components before installation.\u003c\/p\u003e\n\u003cp\u003eThis product is intended for off-road or competition use and is not approved for emissions-controlled street applications. Confirm engine configuration and vehicle compatibility before ordering. Professional installation and careful measurement are recommended to ensure correct piston-to-wall clearance, ring fitment, and final assembly results.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eApplication: Fits Subaru Impreza models with the EJ257 engine\u003c\/li\u003e\n\u003cli\u003eBore: 99.5mm\u003c\/li\u003e\n\u003cli\u003eSize: Standard\u003c\/li\u003e\n\u003cli\u003eCompression Ratio: 8.2:1\u003c\/li\u003e\n\u003cli\u003eBrand: CP Pistons\u003c\/li\u003e\n\u003cli\u003ePart Number: cppSC7420-4\u003c\/li\u003e\n\u003cli\u003eEmissions: Not CARB approved; intended for off-road or competition use\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\nAir Freight Prohibited: false\u003cbr\u003e\nNot Carb Approved: true\u003cbr\u003e\nCarb Acknowledgement Required: true\u003cbr\u003e\nLtl Freight Required: false\u003cbr\u003e\nProp 65: Unknown\u003cbr\u003e\nPart Type: automotive\u003cbr\u003e\nEpa: N\/A\u003cbr\u003e\nRegular Stock: t\u003cbr\u003e\nUnits Per Sku: 1\u003cbr\u003e\nFitment:\u003cbr\u003e\nSubaru Impreza WRX STI 2004\u003cbr\u003e\nSubaru Impreza WRX STI 2005\u003cbr\u003e\nSubaru Impreza WRX STI 2006\u003cbr\u003e\nSubaru Impreza WRX STI 2007\u003cbr\u003e\nSubaru Impreza WRX STI 2008\u003cbr\u003e\nSubaru Impreza WRX STI 2009\u003cbr\u003e\nSubaru Impreza WRX STI 2010\u003cbr\u003e\nSubaru Impreza WRX STI 2011\u003cbr\u003e\nSubaru Impreza WRX STI 2012\u003cbr\u003e\nSubaru Impreza WRX STI Limited 2007\u003cbr\u003e\nSubaru Impreza WRX STI Limited 2011\u003cbr\u003e\nSubaru Impreza WRX STI Limited 2012\u003cbr\u003e\nSubaru Impreza WRX STI Special Edition 2010","brand":"CP Pistons","offers":[{"title":"Default Title","offer_id":47258141884518,"sku":"cppSC7420-4","price":885.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0075\/8703\/7237\/files\/group-6f069080-fe90-4d37-889e-5717ef824c05-800.jpg?v=1790175034","url":"https:\/\/jdmuscleusa.com\/products\/cp-pistons-04-12-impreza-ej257-piston-and-ring-set-99-5mm-bore-standard-size-8-2-1-cr-cppsc7420-4","provider":"JDMuscle","version":"1.0","type":"link"}