{"product_id":"manley-04-12-impreza-wrx-sti-platinum-series-ej257-piston-set-with-rings-99-5-mm-standard-bore-8-5-1-dish","title":"Manley [04-12 Impreza WRX STI] Platinum Series EJ257 Piston Set with Rings - 99.5 mm Standard Bore, 8.5:1 Dish","description":"Our signature \"Platinum Series\" pistons feature 2618 alloy forgings, proven cam and barrel skirt profiles, tool steel wrist pins, and moly skirt coatings on select part numbers. Join the ranks of professional engine builders and tuners who rely on Manley pistons for superior performance and durability.\n\u003cul\u003e\n  \u003cli\u003eChrome Moly Wrist Pins: Premium Chrome Moly wrist pins come standard with our Standard Series Pistons. For select SKUs, we offer wrist pin upgrades to 9310 and Turbo Tuff\/DLC alloys, providing additional durability.\u003c\/li\u003e\n  \u003cli\u003eUnique Fixturing: Manley's unique fixturing allows for skirt turning and ring groove machining in a single operation, ensuring ultimate ring groove to skirt squareness.\u003c\/li\u003e\n  \u003cli\u003eExacting Ring Lands and Grooves: We adhere to strict standards for piston ring lands and grooves, resulting in enhanced ring seal and more power.\u003c\/li\u003e\n  \u003cli\u003eCam and Barrel Profiles: Our pistons boast cam and barrel (skirt) profiles that generate substantial power while being gentle on cylinder walls.\u003c\/li\u003e\n  \u003cli\u003e2618 Alloy Forgings: We use domestic 2618 alloy forgings, ensuring superior strength and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Manley Performance Platinum Series piston set is designed for 04-12 Subaru Impreza WRX STI models equipped with the EJ257 engine. Part number MAN612000C-4 features a standard-stroke configuration, standard bore sizing, an 8.5:1 dish compression ratio, and piston rings for a complete replacement or performance engine build solution.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFeature:\u003c\/strong\u003e 2618 alloy forgings provide high strength and durability for demanding performance applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFeature:\u003c\/strong\u003e Chrome moly wrist pins and precision-machined ring grooves support reliable operation and consistent ring seal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eManley manufactures these pistons using domestic 2618 alloy forgings, a material selected for its strength and ability to withstand high-performance engine conditions. The proven cam and barrel skirt profiles are designed to generate power while maintaining a cylinder-wall-friendly operating profile. Select Manley piston applications also use moly skirt coatings; coating availability can vary by part number.\u003c\/p\u003e\n\u003cp\u003eManley’s unique fixturing process allows skirt turning and ring groove machining to be completed in a single operation. This helps maintain accurate ring groove-to-skirt squareness, supporting proper piston ring alignment and dependable sealing. Precisely controlled ring lands and grooves are engineered to promote consistent ring seal, which can contribute to improved engine efficiency and power retention.\u003c\/p\u003e\n\u003cp\u003eChrome moly wrist pins are supplied with the Standard Series configuration, while select Manley applications may offer upgraded 9310 or Turbo Tuff\/DLC wrist pin options. Verify the intended engine combination, bore specification, compression ratio, and clearance requirements before installation. This product is not CARB approved and may require compliance with applicable emissions regulations. Part number MAN612000C-4 is supplied as one piston set with rings.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e2618 alloy forged aluminum piston construction\u003c\/li\u003e\n\u003cli\u003eStandard-stroke EJ257 application\u003c\/li\u003e\n\u003cli\u003eStandard bore configuration\u003c\/li\u003e\n\u003cli\u003e8.5:1 dish compression ratio\u003c\/li\u003e\n\u003cli\u003eChrome moly wrist pins included\u003c\/li\u003e\n\u003cli\u003ePrecision ring lands and grooves for consistent ring seal\u003c\/li\u003e\n\u003cli\u003eCam and barrel skirt profiles designed for performance and cylinder-wall compatibility\u003c\/li\u003e\n\u003cli\u003ePiston rings included\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: Y\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":"Manley Performance","offers":[{"title":"Default Title","offer_id":47258261356646,"sku":"man612000C-4","price":741.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0075\/8703\/7237\/files\/group-6fb279de-3abc-410e-9607-f540300bf0a1-800_edb121aa-5bed-41ea-b615-5f2b5e63caa2.jpg?v=1790177251","url":"https:\/\/jdmuscleusa.com\/products\/manley-04-12-impreza-wrx-sti-platinum-series-ej257-piston-set-with-rings-99-5-mm-standard-bore-8-5-1-dish","provider":"JDMuscle","version":"1.0","type":"link"}