Manley Performance

Manley Forged Piston Set - 99.75mm +.25mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257

Manley Forged Piston Set - 99.75mm +.25mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257
Manley Forged Piston Set - 99.75mm +.25mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257
Manley Forged Piston Set - 99.75mm +.25mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257
Manley Forged Piston Set - 99.75mm +.25mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257
Manley Forged Piston Set - 99.75mm +.25mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257
Manley Forged Piston Set - 99.75mm +.25mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257
Manley Forged Piston Set - 99.75mm +.25mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257
Manley Forged Piston Set - 99.75mm +.25mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257
Manley Forged Piston Set - 99.75mm +.25mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257
Manley Forged Piston Set - 99.75mm +.25mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257
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Manley Forged Piston Set - 99.75mm +.25mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257Manley Forged Piston Set - 99.75mm +.25mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257Manley Forged Piston Set - 99.75mm +.25mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257Manley Forged Piston Set - 99.75mm +.25mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257Manley Forged Piston Set - 99.75mm +.25mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257Manley Forged Piston Set - 99.75mm +.25mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257Manley Forged Piston Set - 99.75mm +.25mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257Manley Forged Piston Set - 99.75mm +.25mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257Manley Forged Piston Set - 99.75mm +.25mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257Manley Forged Piston Set - 99.75mm +.25mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257
Manley Performance

Manley Forged Piston Set - 99.75mm +.25mm Bore 8.5:1 Dish — Fits 2004+ Subaru WRX/STI EH257

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SKU: MAN632202C-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) - Oversized

Optimize your Subaru WRX/STI engine rebuild with this Manley forged piston set. Designed for the 2004 and newer WRX/STI models with the EH257 engine, these pistons feature an oversized 99.75mm bore (+.25mm) and an 8.5:1 compression ratio with a dish top, perfect for restoring or enhancing engine performance.

Precision Engineered for Durability

  • 2618 Alloy Forgings: Constructed from high-strength domestic 2618 alloy for superior resilience and longevity in performance applications.
  • Chrome Moly Wrist Pins: Comes standard with durable Chrome Moly wrist pins. Upgrades to 9310 and Turbo Tuff/DLC alloys are available for increased toughness.
  • Enhanced Ring Seal: Features precisely machined ring lands and grooves to ensure optimal ring seal, maximizing power and efficiency.
  • Optimized Piston Design: Cam and barrel profiles are engineered to deliver substantial power gains while minimizing cylinder wall friction and wear.
  • Quality Manufacturing: Manley's unique fixturing process allows for simultaneous skirt turning and ring groove machining, guaranteeing perfect squareness and ultimate reliability.

This set of forged pistons is crucial for enthusiasts undertaking an engine overhaul or seeking to improve their Subaru WRX/STI's performance with reliable, high-quality components.

Get 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) - Oversized

Optimize your Subaru WRX/STI engine rebuild with this Manley forged piston set. Designed for the 2004 and newer WRX/STI models with the EH257 engine, these pistons feature an oversized 99.75mm bore (+.25mm) and an 8.5:1 compression ratio with a dish top, perfect for restoring or enhancing engine performance.

Precision Engineered for Durability

  • 2618 Alloy Forgings: Constructed from high-strength domestic 2618 alloy for superior resilience and longevity in performance applications.
  • Chrome Moly Wrist Pins: Comes standard with durable Chrome Moly wrist pins. Upgrades to 9310 and Turbo Tuff/DLC alloys are available for increased toughness.
  • Enhanced Ring Seal: Features precisely machined ring lands and grooves to ensure optimal ring seal, maximizing power and efficiency.
  • Optimized Piston Design: Cam and barrel profiles are engineered to deliver substantial power gains while minimizing cylinder wall friction and wear.
  • Quality Manufacturing: Manley's unique fixturing process allows for simultaneous skirt turning and ring groove machining, guaranteeing perfect squareness and ultimate reliability.

This set of forged pistons is crucial for enthusiasts undertaking an engine overhaul or seeking to improve their Subaru WRX/STI's performance with reliable, high-quality components.

Get 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) - Oversized

Optimize your Subaru WRX/STI engine rebuild with this Manley forged piston set. Designed for the 2004 and newer WRX/STI models with the EH257 engine, these pistons feature an oversized 99.75mm bore (+.25mm) and an 8.5:1 compression ratio with a dish top, perfect for restoring or enhancing engine performance.

Precision Engineered for Durability

  • 2618 Alloy Forgings: Constructed from high-strength domestic 2618 alloy for superior resilience and longevity in performance applications.
  • Chrome Moly Wrist Pins: Comes standard with durable Chrome Moly wrist pins. Upgrades to 9310 and Turbo Tuff/DLC alloys are available for increased toughness.
  • Enhanced Ring Seal: Features precisely machined ring lands and grooves to ensure optimal ring seal, maximizing power and efficiency.
  • Optimized Piston Design: Cam and barrel profiles are engineered to deliver substantial power gains while minimizing cylinder wall friction and wear.
  • Quality Manufacturing: Manley's unique fixturing process allows for simultaneous skirt turning and ring groove machining, guaranteeing perfect squareness and ultimate reliability.

This set of forged pistons is crucial for enthusiasts undertaking an engine overhaul or seeking to improve their Subaru WRX/STI's performance with reliable, high-quality components.

Get your Manley Performance piston set at GGCRACING.

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