• Manley Performance Platinum Series Subaru WRX/STI EH257 Piston Set - 99.75mm Bore, 8.5:1 Compression, Extreme Duty Design
  • Manley Performance Platinum Series Subaru WRX/STI EH257 Piston Set - 99.75mm Bore, 8.5:1 Compression, Extreme Duty Design
  • Manley Performance Platinum Series Subaru WRX/STI EH257 Piston Set - 99.75mm Bore, 8.5:1 Compression, Extreme Duty Design
  • Manley Performance Platinum Series Subaru WRX/STI EH257 Piston Set - 99.75mm Bore, 8.5:1 Compression, Extreme Duty Design
  • Manley Performance Platinum Series Subaru WRX/STI EH257 Piston Set - 99.75mm Bore, 8.5:1 Compression, Extreme Duty Design
  • Manley Performance Platinum Series Subaru WRX/STI EH257 Piston Set - 99.75mm Bore, 8.5:1 Compression, Extreme Duty Design
  • Manley Performance Platinum Series Subaru WRX/STI EH257 Piston Set - 99.75mm Bore, 8.5:1 Compression, Extreme Duty Design
  • Manley Performance Platinum Series Subaru WRX/STI EH257 Piston Set - 99.75mm Bore, 8.5:1 Compression, Extreme Duty Design
  • Manley Performance Platinum Series Subaru WRX/STI EH257 Piston Set - 99.75mm Bore, 8.5:1 Compression, Extreme Duty Design
  • Manley Performance Platinum Series Subaru WRX/STI EH257 Piston Set - 99.75mm Bore, 8.5:1 Compression, Extreme Duty Design
1 10

Manley Performance

Manley Performance Platinum Series Subaru WRX/STI EH257 Piston Set - 99.75mm Bore, 8.5:1 Compression, Extreme Duty Design

Manley Performance Platinum Series Subaru WRX/STI EH257 Piston Set - 99.75mm Bore, 8.5:1 Compression, Extreme Duty Design

$887.85 USD
$887.85 USD
Sale Sold out
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/DIS E/D.
  • 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.

Elevate your Subaru WRX or STI engine with the Manley Performance Platinum Series EH257 piston set, engineered for high-performance and durability. Crafted from premium 2618 alloy forgings, these pistons offer exceptional strength and resistance to stress under demanding conditions. The design features proven cam and barrel (skirt) profiles that generate significant power while maintaining gentle contact with the cylinder walls, promoting longevity and consistent performance.
Manley's precise manufacturing process includes unique fixturing that allows for skirt turning and ring groove machining in a single operation, ensuring perfect ring groove to skirt squareness for optimal sealing. The pistons adhere to strict standards for ring lands and grooves, enhancing ring seal integrity and translating to increased power output.
Standard-equipped chrome moly wrist pins provide reliable durability, with optional upgrades to 9310 or Turbo Tuff/DLC alloys available for additional strength. These pistons are designed with enhanced features such as moly skirt coatings on select part numbers, further reducing wear and friction. Please note that these pistons are not CARB approved and require carb acknowledgment during installation. They are suitable for air freight shipping and are intended for automotive applications, ensuring professional-grade quality for serious tuners and engine builders.

Features:

  • 2618 alloy forgings for superior strength and performance
  • Cam and barrel (skirt) profiles designed for high power output with minimal cylinder wall wear
  • Unique fixturing for precise skirt turning and ring groove machining
  • Exacting ring lands and grooves for enhanced sealing and efficiency
  • Standard chrome moly wrist pins with optional upgrades to 9310 or Turbo Tuff/DLC alloys
  • Moly skirt coatings on select part numbers for reduced wear and friction
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

View full details