{"product_id":"manley-performance-subaru-ej257-99-75mm-0-25mm-bore-platinum-series-piston-set-with-rings-high-performance-forged-pistons","title":"Manley Performance Subaru EJ257 99.75mm +0.25mm Bore Platinum Series Piston Set with Rings – High-Performance Forged Pistons","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 Subaru EJ257 Platinum Series Piston Set offers professional-grade components designed for exceptional durability and performance in high-performance engines. Crafted from 2618 alloy forgings, these pistons provide superior strength and thermal stability, making them ideal for demanding tuning applications. The precision-designed cam and barrel (skirt) profiles optimize power output while minimizing wear on cylinder walls, ensuring longevity and efficiency.\u003c\/p\u003e\u003cp\u003eEach piston features moly skirt coatings on select part numbers, reducing friction and enhancing durability under high-stress conditions. Chrome Moly wrist pins are standard, providing reliable connection between the piston and connecting rod. For increased durability, select SKUs offer upgraded wrist pins made from 9310 and Turbo Tuff\/DLC alloys. Manley's unique fixturing process allows for simultaneous skirt turning and ring groove machining, ensuring precise ring land and groove dimensions for optimal sealing and power gains.\u003c\/p\u003e\u003cp\u003eDesigned with exacting standards, the pistons include carefully machined ring lands and grooves to promote better ring seal and combustion efficiency. This set is suitable for engines requiring a 99.75mm bore with a +0.25mm oversize, and is ideal for enthusiasts and professional tuners seeking reliable, high-performance pistons for forced induction or naturally aspirated builds. The set complies with Prop 65 regulations and is ready for installation in automotive applications, offering a robust solution for engine builders aiming for maximum performance and durability.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003e2618 alloy forged construction for superior strength and thermal stability\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eCam and barrel (skirt) profiles optimized for power and cylinder wall friendliness\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMoly skirt coatings on select part numbers to reduce friction and wear\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eChrome Moly wrist pins standard, with optional upgraded alloys for enhanced durability\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eUnique fixturing allows for skirt turning and ring groove machining in a single step\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePrecisely machined ring lands and grooves for improved ring seal and combustion efficiency\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eDesigned for 99.75mm bore with +0.25mm oversize, suitable for high-performance engines\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMeets Prop 65 standards for safety and compliance\u003c\/li\u003e\u003c\/ul\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbdoy\u003e\n\u003ctr\u003e\u003ctd\u003eAir Freight Prohibited: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eNot Carb Approved: true\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eCarb Acknowledgement Required: true\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eLtl Freight Required: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eProp 65: Y\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003ePart Type: automotive\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eEpa: N\/A\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eRegular Stock: t\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eUnits Per Sku: 1\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbdoy\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Manley Performance","offers":[{"title":"Default Title","offer_id":53605156487441,"sku":"612202C-4","price":699.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/3830\/0689\/files\/538828877b1fbb2fecf713045c8f4edc_4f16bf76-f48b-486e-926e-172ccd60d603.jpg?v=1779985512","url":"https:\/\/shoprenegade.com\/products\/manley-performance-subaru-ej257-99-75mm-0-25mm-bore-platinum-series-piston-set-with-rings-high-performance-forged-pistons","provider":"Renegade Speed by Renegade Racing \u0026 Performance","version":"1.0","type":"link"}