Manley Performance Platinum Series Piston for Subaru WRX STI EJ257 - 99.5mm Bore, Grade B, Single with Rings

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. Manley Piston Single, PIST-SUBARU 99.5mm/GRADE B.

• Chrome 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.
• Unique Fixturing: Manley's unique fixturing allows for skirt turning and ring groove machining in a single operation, ensuring ultimate ring groove to skirt squareness.
• Exacting Ring Lands and Grooves: We adhere to strict standards for piston ring lands and grooves, resulting in enhanced ring seal and more power.
• Cam and Barrel Profiles: Our pistons boast cam and barrel (skirt) profiles that generate substantial power while being gentle on cylinder walls.
• 2618 Alloy Forgings: We use domestic 2618 alloy forgings, ensuring superior strength and performance.

Designed for high-performance Subaru WRX STI engines, the Manley Performance Platinum Series piston offers exceptional durability and power. Crafted from 2618 alloy forgings, this piston is engineered to withstand the rigors of demanding tuning environments while maintaining strength and reliability. The cam and barrel skirt profiles are meticulously designed to deliver substantial power output while being gentle on the cylinder walls, ensuring longevity and consistent performance. With precise ring land and groove specifications, this piston promotes optimal ring seal for improved combustion efficiency and increased horsepower. The inclusion of premium chrome moly wrist pins, standard on this piston, enhances durability, with optional upgrades to 9310 or Turbo Tuff/DLC alloys available for even greater strength in high-stress applications. Manley's unique fixturing process allows for skirt turning and ring groove machining in a single operation, guaranteeing perfect squareness and superior fitment. Whether you're building a high-performance daily driver or a competition-ready engine, this piston provides the reliability and performance that professional tuners demand. Please note that this product requires carb acknowledgment and is intended for use in non-CARB compliant applications. It is not approved for use in vehicles with catalytic converters, making it ideal for race or off-road use. The piston is sold individually, suitable for engines with a 79mm stroke and a 99.50mm bore, and is an essential component for those seeking to maximize their engine's potential.

Features:

• 2618 alloy forging: Ensures high strength and durability under demanding conditions

• Cam and barrel skirt profiles: Designed for substantial power output with minimal cylinder wall stress

• Chrome moly wrist pins: Standard feature for enhanced durability, with optional high-performance upgrades available

• Unique fixturing: Allows for precise skirt turning and ring groove machining in a single operation

• Exacting ring lands and grooves: Promotes better ring seal and increased horsepower

Air Freight Prohibited: false
Not Carb Approved: true
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Regular Stock: t
Units Per Sku: 1