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Manley Performance Manley 04+ Subaru WRX/STI EH257 100.0mm Bore +.50mm Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 100.0mm Bore +.50mm Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 100.0mm Bore +.50mm Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 100.0mm Bore +.50mm Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 100.0mm Bore +.50mm Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 100.0mm Bore +.50mm Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 100.0mm Bore +.50mm Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 100.0mm Bore +.50mm Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 100.0mm Bore +.50mm Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 100.0mm Bore +.50mm Size 8.5:1 Dish Piston Set
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Manley 04+ Subaru WRX/STI EH257 100.0mm Bore +.50mm Size 8.5:1 Dish Piston Set

MAN632205C-4
807298088051
Piston Sets - Forged - 4cyl
6 Units In Stock - Ships Next Business Day
$ 878.92 $ 808.61
$ 808.61

SKU: 632205C-4 | UPC: 807298088051

Manley 04+ Subaru WRX/STI EJ257 100.0mm Bore +.50mm Size 8.5:1 Dish Piston Set

This set of four Platinum Series forged pistons fits 2004-2021 Subaru WRX STI models with EJ257 2.5L turbo engines. Oversized 100.0mm bore with +0.50mm sizing and 8.5:1 compression ratio dish supports high-boost turbo setups. Engineered for strength in performance builds with precise fit for stock stroke 79mm and rod length 130.5mm.

Key Features

  • 2618-T6 Alloy Forgings: High-tensile forged aluminum delivers strength and heat resistance for extreme turbo power
  • Proven Cam and Barrel Skirt Profiles: Optimized design cuts friction improves sealing and extends engine life
  • Tool Steel Wrist Pins: 0.927in diameter x 2.447in long pins with 132g weight handle high loads without failure
  • Moly Skirt Coatings: Reduces scuffing galling and break-in time for smoother operation
  • Complete Set Includes: Premium rings (1.2mm 1.5mm 2.8mm) pins and spiro locks with 443g piston weight (w/pin)

Product Notes

  • Compression height 30mm head volume -15cc dish yields 8.5:1 CR at .040/.039/.039 gasket/rings
  • Inspect cylinder bores for +0.50mm oversize compatibility before use
  • Ships in protective packaging to ensure parts arrive ready for install

Installation Notes

  • Professional installation recommended.
  • Verify ring end gaps and piston-to-wall clearance per Manley specs
  • Compatible with OEM or aftermarket connecting rods uses included hardware

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?

  • Professional engine builders and tuners depend on Manley for race-proven results
  • 2618 alloy construction withstands high heat and pressure in turbo engines
  • Exact tolerances ensure balanced rotation and reliable performance

Frequently Asked Questions

  • Q: Will these pistons fit my 2006 Subaru STI EJ257?
    A: Yes designed specifically for 2004-2021 Subaru STI EJ257 2.5L turbo engines with 100.0mm +0.50mm bore.
  • Q: What material and coatings are used?
    A: 2618-T6 forged aluminum alloy with moly skirt coatings plus tool steel pins for durability.
  • Q: Does the set include rings and pins?
    A: Yes includes four sets of performance rings tool steel pins and spiro locks ready for assembly.

Shipping & Handling

  • Method: UPS Ground or FedEx Ground
  • Availability: In stock - ships same or next business day
  • Packaging: Secure custom box 12in x 8in x 6in
  • Weight: 4.20 lbs

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