Manley Performance 04+ Subaru WRX/STI EH257 99.75mm Bore Dish Piston Set – 8.5:1 Compression

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 Set, PIST-SUBARU 99.75mm/1.209 CD/DISH T/T.

• 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.

Upgrade your Subaru WRX or STI with the Manley Performance EH257 piston set, designed for high-performance applications and durability. Crafted from premium 2618 alloy forgings, these pistons deliver exceptional strength and resistance under demanding conditions. The signature "Platinum Series" features proven cam and barrel skirt profiles that generate substantial power while minimizing wear on your engine's cylinder walls. Whether you're building a race-ready machine or enhancing daily driver performance, these pistons provide a reliable foundation for your build.
The set includes chrome moly wrist pins as standard, with options for upgraded materials like 9310 and Turbo Tuff/DLC alloys for increased durability in high-stress environments. Manley's unique fixturing process allows for precise skirt turning and ring groove machining in a single operation, ensuring perfect squareness and optimal ring sealing. This results in improved compression, better ring seal, and increased horsepower.
Each piston features meticulously machined ring lands and grooves, adhering to strict standards for enhanced ring seal and power output. The design emphasizes a gentle but effective cam and barrel profile that balances power production with minimal stress on your engine components. This combination delivers superior performance and longevity, making these pistons a trusted choice for professional engine builders and tuners alike. Suitable for vehicles with a 99.75mm bore, these pistons are engineered for high-performance Subaru applications, providing a reliable upgrade for enthusiasts seeking maximum efficiency and power.

Features:

• 2618 alloy forgings for superior strength and durability

• Proven cam and barrel skirt profiles for high power output

• Chrome moly wrist pins included, with optional DLC or 9310 alloy upgrades

• Unique fixturing allows for precise skirt turning and ring groove machining

• Exacting ring lands and grooves for enhanced sealing and performance

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