Manley Performance 04+ Subaru WRX/STI EH257 99.50mm Bore Dish Piston Set - High-Performance Forged Pistons with 2618 Alloy for Enhanced Durability and Power

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 99.5mm/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.

Designed for high-performance Subaru WRX and STI engines, the Manley Performance EH257 piston set features precision-forged 2618 alloy construction, providing exceptional strength and reliability under demanding conditions. Each piston incorporates proven cam and barrel skirt profiles that generate substantial power while maintaining gentle contact with cylinder walls, promoting longevity and consistent performance. The set includes chrome moly wrist pins as standard, with optional upgrades to 9310 or Turbo Tuff/DLC alloys for additional durability in aggressive tuning applications.
Manley's unique fixturing process ensures precise machining of ring grooves and skirt turning in a single operation, resulting in optimal ring land integrity and a perfect fit for maximum sealing and power output. The pistons are engineered with strict adherence to precise ring land and groove standards, enhancing ring seal and combustion efficiency.
Constructed from domestic 2618 alloy forgings, these pistons deliver superior strength and heat resistance, essential for high-boost and high-rpm environments. The set is ideal for professional engine builders and tuners seeking a combination of performance, durability, and reliability. Please note that these pistons are not carb-approved and require acknowledgment of Prop 65 compliance before installation. With a bore size of 99.50mm and a high compression ratio of 8.5:1, the Manley EH257 pistons are a trusted choice for enthusiasts looking to maximize their engine’s potential.

Features:

• Forged 2618 alloy construction for high strength and durability

• Cam and barrel skirt profiles designed for optimal power and cylinder wall friendliness

• Chrome moly wrist pins included, with optional upgrade to 9310 or Turbo Tuff/DLC alloys

• Unique fixturing for combined skirt turning and ring groove machining ensures precise ring land and groove quality

• Strict standards for ring land and groove dimensions enhance sealing and power output

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