-7%
Sold out
Manley Performance Manley 04+ Subaru WRX/STI EH257 99.75mm Bore +.25mm Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 99.75mm Bore +.25mm Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 99.75mm Bore +.25mm Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 99.75mm Bore +.25mm Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 99.75mm Bore +.25mm Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 99.75mm Bore +.25mm Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 99.75mm Bore +.25mm Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 99.75mm Bore +.25mm Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 99.75mm Bore +.25mm Size 8.5:1 Dish Piston Set
Manley Performance Manley 04+ Subaru WRX/STI EH257 99.75mm Bore +.25mm Size 8.5:1 Dish Piston Set
Click to zoom in

Manley 04+ Subaru WRX/STI EH257 99.75mm Bore +.25mm Size 8.5:1 Dish Piston Set

MAN632202C-4
807298088037
Piston Sets - Forged - 4cyl
Out of stock
$ 878.92 $ 808.61

SKU: 632202C-4 | UPC: 807298088037

Manley 04+ Subaru WRX/STI EH257 99.75mm Bore +.25mm Size 8.5:1 Dish Piston Set

This Manley Platinum Series piston set delivers forged strength for 2004-2021 Subaru Impreza WRX/STI models with EJ257 2.5L turbo engines. The 99.75mm bore +0.25mm oversize design with 8.5:1 compression ratio dish supports high-boost applications while maintaining reliability. Engine builders choose these pistons for their durability in racing and street performance builds.

Key Features

  • 2618-T61 Alloy Forgings: High-tensile strength material handles detonation and extreme cylinder pressures in turbocharged EJ257 engines
  • Proven Skirt Profiles: Cam and barrel design with low-friction geometry reduces power loss and wear during high-RPM operation
  • Tool Steel Wrist Pins: H13 material HRC 38-44 provides superior wear resistance and secure connection to rods
  • Moly Skirt Coating: Graphite-moly finish minimizes scuffing, galling, and friction on cylinder walls
  • Accumulator Groove: Controls ring flutter under boost for consistent sealing and power delivery

Product Notes

  • Rings sold separately. recommend Manley 932K-4 ring set for proper groove fit
  • Skirts require file fitting to achieve 0.0035-0.0045 inch piston-to-wall clearance
  • Set ships balanced. verify rod and crank balance during assembly

Installation Notes

  • Professional installation recommended.
  • Compression height 30.52mm. confirm with head gasket and block deck height
  • Compatible with OEM or aftermarket rods. use moly or C5-A assembly lube on pins

This Part Fits

Year Make Model Submodel
2004-2007 Subaru Impreza WRX STI
2008-2014 Subaru Impreza WRX STI
2015-2021 Subaru WRX STI
2005-2009 Subaru Legacy GT
2004-2021 Subaru Impreza WRX STI EJ257

Why Choose Manley?

  • Proven in professional racing teams and tuner shops worldwide
  • Exact tolerances ensure drop-in reliability for Subaru EJ257 rebuilds
  • Backed by decades of piston engineering for 4-cylinder turbo engines

Frequently Asked Questions

  • Q: Will this fit my 2006 Subaru STI EJ257 engine?
    A: Yes, designed for all 2004-2021 EJ257-equipped WRX/STI models including USDM and JDM variants with 99.5mm standard bore
  • Q: What is the piston weight and material?
    A: Each piston weighs 405 grams. constructed from lightweight 2618-T61 forged aluminum alloy
  • Q: What warranty applies and are rings included?
    A: Manley offers limited warranty against manufacturing defects. rings not included, order separately for custom bore fit

Shipping & Handling

  • Method: UPS Ground or FedEx
  • Availability: In stock - ships same or next business day
  • Packaging: Protective foam-lined box 12in x 10in x 6in
  • Weight: 5 lbs

Request For Information

Have questions about Manley 04+ Subaru WRX/STI EH257 99.75mm Bore +.25mm Size 8.5:1 Dish Piston Set? Fill out the form below and we'll get back to you by the next business day.
Engine

Engine

Engine parts and engine bay upgrades for Dodge, Jeep, RAM, Chrysler, Chevrolet, Ford, Toyota, Nissan, Subaru, and Honda vehicles are stocked at Black Ops Auto Works. Shop oil catch cans, supercharger pulleys, thermostats, radiators, cooling parts, throttle bodies, intake manifolds, headers, ignition coils, spark plugs, sensors, gaskets, fuel pumps, valve covers, engine covers, billet cap covers, and full engine bay dress-up parts for HEMI, Hellcat, Trackhawk, Redeye, Demon, Scat Pack, RAM TRX, LS, LT, Coyote, EcoBoost, K-Series, and 2JZ builds. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 14,298 engine SKUs across performance, cooling, oil control, ignition, and appearance categories. What This Category Covers The Engine collection combines OEM-replacement engine service parts with performance aftermarket upgrades for supercharged, turbocharged, and naturally aspirated builds...

View Engine Products
Manley Performance

Manley Performance

Manley Performance is a New Jersey-founded engine internals manufacturer stocked at Black Ops Auto Works, supplying forged pistons, connecting rods, valves, and crankshafts across domestic and import platforms. Shop Manley H-Beam and H-Tuff connecting rods, Race Master Series valves, forged crankshafts, and valve springs for Ford Modular and Coyote, Chrysler HEMI, Subaru EJ and FA, Nissan SR20 and 2JZ, Honda B and H-series, and Mitsubishi 4B11T and Mazda MZR platforms. Every product is filterable by year, make, model, and engine code so the correct part ships the first time. Black Ops Auto Works carries 270 Manley Performance SKUs across pistons, rotating assembly, and valvetrain components. About Manley Performance Founded in 1966 by Hank Manley as Manley Speed Equipment, Manley Performance has grown into one of the most established names in high-performance engine internals. From grassroots drag racing roots in New Jersey to a second manufacturing facility in Orange, Californi...

View Manley Performance Products
Piston Sets - Forged - 4cyl

Piston Sets - Forged - 4cyl

Forged 4-cylinder piston sets built for boosted street and race engines are stocked at Black Ops Auto Works. Shop forged piston sets from leading manufacturers sized for popular 4-cylinder turbo platforms, engineered to handle high boost, high compression, and repeated hard use without the failure risk of cast pistons. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct piston set ships the first time. Black Ops Auto Works carries 402 forged 4-cylinder piston set SKUs across bore size, compression ratio, and platform fitment. What This Category Covers The Piston Sets - Forged - 4cyl collection covers complete forged piston sets for inline-4 turbo and naturally aspirated engines, sized to specific bore diameters and offered in multiple compression ratios for street, drag, and road race builds. The catalog is strongest on Manley, Wiseco, and CP-Carrillo forged sets for common Honda, Subaru, Mitsubishi, and Mazda 4-cylinder turbo platforms....

View Piston Sets - Forged - 4cyl Products
Pistons

Pistons

Pistons and piston components for engine builds and rebuilds are stocked at Black Ops Auto Works. Shop forged and cast piston sets, piston rings, piston pins, and pin locks for 4, 5, 6, and 8-cylinder gas engines and diesel applications, including Cummins 5.9L 12-valve, Toyota 2JZGTE, Honda K20, BMW and Toyota B58, GM 6.2L LT1 and L86, Chrysler Gen3 Hemi 6.2L Hellcat and 6.4L Apache, and Nissan VQ35DE builds. Every product is filterable by bore size, engine platform, compression ratio, and application so the correct piston set ships the first time. Black Ops Auto Works carries 997 piston and piston component SKUs across forged, cast, and diesel-specific categories. What This Category Covers Pistons are the core moving component of any engine build, transferring combustion force into rotational power through the connecting rod and crankshaft. This category covers complete piston sets plus the individual components, rings, pins, and pin locks, needed for a full rebuild or performa...

View Pistons Products
Military & First Responder Discounts

Military & First Responder Discount Program

Black Ops Auto Works proudly honors active duty military, veterans, National Guard, reserves, police officers, firefighters, and EMTs with an exclusive 5% discount on all performance parts and carbon fiber upgrades. Verify instantly and start saving today.

Learn More & Apply

Your cart

×