{"product_id":"manley-performance-04-07-wrx-sti-eh257-100mm-bore-50mm-forged-dish-piston-set-8-5-1-compression","title":"Manley Performance [04-07 WRX\/STI] EH257 100mm Bore +.50mm Forged Dish Piston Set - 8.5:1 Compression","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.\nManley Piston Set, SUBARU 100mm\/1.209 CD\/DISH T\/T.\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 2004-2007 Subaru WRX and STI applications using the EH257 engine. This set features a 100mm bore size, +.50mm oversize fitment, an 8.5:1 compression ratio, and a dished crown configuration. Part number MAN632205C-4 is built for high-performance engine applications where strength, ring seal, and durability are critical.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFeature: Domestic 2618 alloy forgings provide strength for demanding performance applications.\u003c\/li\u003e\n  \u003cli\u003eFeature: Chrome moly wrist pins, cam and barrel skirt profiles, and moly skirt coatings on select part numbers support durability and controlled cylinder-wall contact.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eManley Performance uses specialized manufacturing processes to produce consistent piston geometry and reliable performance. Unique fixturing allows skirt turning and ring groove machining to be completed in a single operation, helping maintain precise ring groove-to-skirt squareness. Exacting standards for ring lands and grooves are used to support effective ring seal and power production.\u003c\/p\u003e\n\u003cp\u003eThe piston design incorporates proven cam and barrel skirt profiles intended to generate performance while helping reduce unnecessary cylinder-wall wear. The 2618 alloy forging is well suited to high-output engines because of its strength and tolerance for demanding operating conditions. Chrome moly wrist pins are included as standard for this piston configuration. Verify bore clearance, compression height, connecting rod compatibility, ring package, and final compression ratio with the engine builder before assembly.\u003c\/p\u003e\n\u003cp\u003eThis product is intended for automotive use and is not CARB approved. California buyers should verify emissions requirements before purchase and installation. Manley Performance part number MAN632205C-4 identifies this specific piston set configuration.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDomestic 2618 alloy forgings for strength in high-performance engine applications\u003c\/li\u003e\n\u003cli\u003e100mm bore with +.50mm oversize fitment for compatible EH257 engine builds\u003c\/li\u003e\n\u003cli\u003e8.5:1 compression ratio with dished piston crown design\u003c\/li\u003e\n\u003cli\u003eChrome moly wrist pins included for added durability\u003c\/li\u003e\n\u003cli\u003eUnique fixturing supports precise skirt and ring groove machining\u003c\/li\u003e\n\u003cli\u003eExacting ring lands and grooves help promote consistent ring seal\u003c\/li\u003e\n\u003cli\u003eCam and barrel skirt profiles are designed for performance and controlled cylinder-wall contact\u003c\/li\u003e\n\u003cli\u003eNot CARB approved\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: false\u003cbr\u003e\nUnits Per Sku: 1","brand":"Manley Performance","offers":[{"title":"Default Title","offer_id":47258251034726,"sku":"man632205C-4","price":808.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0075\/8703\/7237\/files\/ccc942b7af9dd56b729c4e1543ef9ff9L_f0b2e132-6410-445e-a87a-2e2aacdc8df3.jpg?v=1790177031","url":"https:\/\/jdmuscleusa.com\/products\/manley-performance-04-07-wrx-sti-eh257-100mm-bore-50mm-forged-dish-piston-set-8-5-1-compression","provider":"JDMuscle","version":"1.0","type":"link"}