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Manley Performance Manley 04+ Subaru WRX/STI EH257 99.50mm Bore STD Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 99.50mm Bore STD Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 99.50mm Bore STD Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 99.50mm Bore STD Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 99.50mm Bore STD Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 99.50mm Bore STD Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 99.50mm Bore STD Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 99.50mm Bore STD Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 99.50mm Bore STD Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 99.50mm Bore STD Size 8.5:1 Dish Piston Set
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Manley 04+ Subaru WRX/STI EH257 99.50mm Bore STD Size 8.5:1 Dish Piston Set

MAN632200C-4
807298085876
Piston Sets - Forged - 4cyl
1 Units In Stock - Ships Next Business Day
$ 878.92 $ 808.61
$ 808.61

SKU: 632200C-4 | UPC: 807298085876

Manley 04+ Subaru WRX/STI EH257 99.50mm Bore STD Size 8.5:1 Dish Piston Set

This Manley Platinum Series piston set delivers forged construction for 2004 and later Subaru WRX and STI models equipped with the EJ257 2.5L engine. The 99.50mm standard bore and 8.5:1 compression ratio support tuned builds seeking durability under boost. Engine builders count on these pistons for consistent ring seal and long-term strength in high-horsepower applications.

Key Features

  • 2618 Alloy Forgings: High-silicon aluminum provides resistance to detonation and fatigue in forced-induction setups
  • Proven Skirt Profiles: Cam and barrel shapes minimize friction and noise while maintaining cylinder wall contact
  • Tool Steel Wrist Pins: 793-20-20-20Z pins with wire locks ensure secure rod attachment under extreme loads
  • Moly Skirt Coatings: Reduce initial break-in wear and galling for smoother operation
  • Exact Specifications: 99.50mm bore, -8cc dish (8.5:1 CR), 30.03mm compression height, 1.2/1.2/2.5mm rings included, 547g weight per piston

Product Notes

  • Confirm engine bore measures 99.50mm before installation
  • Store in original packaging to protect coatings until assembly
  • Handle with care to avoid nicks on ring grooves or skirts

Installation Notes

  • Professional installation recommended.
  • Compression height of 30.03mm requires stock-length rods for proper deck clearance
  • Includes rings, pins, and locks. compatible with Subaru EJ257 rods

This Part Fits

Year Make Model Submodel
2004-2007 Subaru Impreza WRX STI
2008-2014 Subaru Impreza WRX STI
2015-2021 Subaru WRX STI

Why Choose Manley?

  • Proven in professional race and street builds for decades
  • Forged components withstand 1000+ hp levels
  • Precision CNC machining ensures tight tolerances

Frequently Asked Questions

  • Q: Will this fit my 2006 STI EJ257 engine?
    A: Yes, designed for 2004-2021 Subaru STI EJ257 2.5L DOHC with stock 99.50mm bore
  • Q: What alloy and rings are used?
    A: 2618 T6 aluminum forgings with 1.2mm top, 1.2mm second, 2.5mm oil rings pre-installed
  • Q: What is the warranty coverage?
    A: Manley offers a limited lifetime warranty against manufacturing defects when installed correctly

Shipping & Handling

  • Method: UPS Ground or FedEx
  • Availability: In stock - ships same or next business day
  • Packaging: Securely boxed set of 4 pistons, 10 x 8 x 4 inches
  • Weight: 3 lbs shipping weight

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