Manley Performance

Manley Forged Piston Set - 100.0mm +.50mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257

Manley Forged Piston Set - 100.0mm +.50mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257
Manley Forged Piston Set - 100.0mm +.50mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257
Manley Forged Piston Set - 100.0mm +.50mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257
Manley Forged Piston Set - 100.0mm +.50mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257
Manley Forged Piston Set - 100.0mm +.50mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257
Manley Forged Piston Set - 100.0mm +.50mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257
Manley Forged Piston Set - 100.0mm +.50mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257
Manley Forged Piston Set - 100.0mm +.50mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257
Manley Forged Piston Set - 100.0mm +.50mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257
Manley Forged Piston Set - 100.0mm +.50mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257
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Manley Forged Piston Set - 100.0mm +.50mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257Manley Forged Piston Set - 100.0mm +.50mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257Manley Forged Piston Set - 100.0mm +.50mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257Manley Forged Piston Set - 100.0mm +.50mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257Manley Forged Piston Set - 100.0mm +.50mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257Manley Forged Piston Set - 100.0mm +.50mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257Manley Forged Piston Set - 100.0mm +.50mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257Manley Forged Piston Set - 100.0mm +.50mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257Manley Forged Piston Set - 100.0mm +.50mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257Manley Forged Piston Set - 100.0mm +.50mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257
Manley Performance

Manley Forged Piston Set - 100.0mm +.50mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257

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SKU: MAN632205C-4
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About Manley Performance Manley Performance engineers high-quality automotive parts and ...Read More

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$762.99 $829.17
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches
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Product Details

Product Description
Part Numbers
Sizing & Fit

About Manley Performance

Manley Performance engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Manley Performance lineup with fast shipping and expert fitment support — order with confidence.

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Manley Forged Piston Set for 2004+ Subaru WRX/STI (EH257) - Large Oversize

Revitalize your Subaru WRX/STI engine with this Manley forged piston set. Designed for the 2004 and newer WRX/STI models equipped with the EH257 engine, these pistons feature a large oversized 100.0mm bore (+.50mm) and an 8.5:1 compression ratio with a dish top, ideal for engine rebuilds and performance enhancements.

Durable Construction for Performance

  • 2618 Alloy Forgings: Made from robust domestic 2618 alloy, these pistons offer superior strength and durability for demanding performance applications.
  • Chrome Moly Wrist Pins: Includes premium Chrome Moly wrist pins as standard. Optional upgrades to 9310 and Turbo Tuff/DLC alloys are available for increased toughness.
  • Precision Ring Seal: Features meticulously machined ring lands and grooves to ensure optimal ring seal, leading to increased power and efficiency.
  • Optimized Profiles: Cam and barrel (skirt) profiles are engineered to generate substantial power while minimizing cylinder wall wear.
  • Quality Manufacturing: Manley's unique fixturing process ensures skirt turning and ring groove machining are performed in a single operation, guaranteeing perfect squareness and ultimate reliability.

This set of forged pistons is essential for Subaru WRX/STI owners undertaking an engine rebuild that requires oversized pistons for optimal performance and longevity.

Find your Manley Performance piston set at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Manley Performance

Manley Performance engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Manley Performance lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Manley Forged Piston Set for 2004+ Subaru WRX/STI (EH257) - Large Oversize

Revitalize your Subaru WRX/STI engine with this Manley forged piston set. Designed for the 2004 and newer WRX/STI models equipped with the EH257 engine, these pistons feature a large oversized 100.0mm bore (+.50mm) and an 8.5:1 compression ratio with a dish top, ideal for engine rebuilds and performance enhancements.

Durable Construction for Performance

  • 2618 Alloy Forgings: Made from robust domestic 2618 alloy, these pistons offer superior strength and durability for demanding performance applications.
  • Chrome Moly Wrist Pins: Includes premium Chrome Moly wrist pins as standard. Optional upgrades to 9310 and Turbo Tuff/DLC alloys are available for increased toughness.
  • Precision Ring Seal: Features meticulously machined ring lands and grooves to ensure optimal ring seal, leading to increased power and efficiency.
  • Optimized Profiles: Cam and barrel (skirt) profiles are engineered to generate substantial power while minimizing cylinder wall wear.
  • Quality Manufacturing: Manley's unique fixturing process ensures skirt turning and ring groove machining are performed in a single operation, guaranteeing perfect squareness and ultimate reliability.

This set of forged pistons is essential for Subaru WRX/STI owners undertaking an engine rebuild that requires oversized pistons for optimal performance and longevity.

Find your Manley Performance piston set at GGCRACING.

Product Details

Product Description

About Manley Performance

Manley Performance engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Manley Performance lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Manley Forged Piston Set for 2004+ Subaru WRX/STI (EH257) - Large Oversize

Revitalize your Subaru WRX/STI engine with this Manley forged piston set. Designed for the 2004 and newer WRX/STI models equipped with the EH257 engine, these pistons feature a large oversized 100.0mm bore (+.50mm) and an 8.5:1 compression ratio with a dish top, ideal for engine rebuilds and performance enhancements.

Durable Construction for Performance

  • 2618 Alloy Forgings: Made from robust domestic 2618 alloy, these pistons offer superior strength and durability for demanding performance applications.
  • Chrome Moly Wrist Pins: Includes premium Chrome Moly wrist pins as standard. Optional upgrades to 9310 and Turbo Tuff/DLC alloys are available for increased toughness.
  • Precision Ring Seal: Features meticulously machined ring lands and grooves to ensure optimal ring seal, leading to increased power and efficiency.
  • Optimized Profiles: Cam and barrel (skirt) profiles are engineered to generate substantial power while minimizing cylinder wall wear.
  • Quality Manufacturing: Manley's unique fixturing process ensures skirt turning and ring groove machining are performed in a single operation, guaranteeing perfect squareness and ultimate reliability.

This set of forged pistons is essential for Subaru WRX/STI owners undertaking an engine rebuild that requires oversized pistons for optimal performance and longevity.

Find your Manley Performance piston set at GGCRACING.

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