-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 ? Fill out the form below and we'll get back to you by the next business day.
Engine

Engine

This engine parts collection covers oil catch cans, thermostats, thermostat housings, radiator components, coolant accessories, engine covers, fuse box covers, cap covers, throttle bodies, supercharger pulleys, idler pulleys, tensioner pulleys, and engine bay dress-up parts for trucks, SUVs, muscle cars, boosted builds, high-horsepower street cars, and performance vehicles that need better reliability, cooling, airflow, oil control, and under-hood styling. The collection is particularly strong for Dodge Challenger, Charger, Durango, Jeep Grand Cherokee Trackhawk, and Ram TRX platforms running 6.2L Hellcat, 6.4L HEMI, and 5.7L HEMI engines, where oil catch can and cooling upgrades address known OEM weaknesses in the PCV and thermal management systems. Import performance platforms including GM LS-based builds, Chevrolet Camaro, and Corvette applications are also represented through Mishimoto, CSF, and ZPE GripTec product lines. Builders who invest in engine bay organization and reliab...

View Engine Products
Manley Performance

Manley Performance

Founded in 1966 by Hank Manley, Manley Performance Products has become one of the most respected names in high-performance engine components. Originally launched as Manley Speed Equipment, the company quickly earned a reputation for precision manufacturing, durability, and race-proven performance. From grassroots beginnings in New Jersey to global recognition in professional motorsports, Manley Performance continues to set the standard in high-performance automotive parts. Manley Performance Engine Parts Manley is known for manufacturing premium internal engine components designed for street, strip, and professional racing applications. Their product line includes: Manley stainless steel valves Manley forged pistons Manley connecting rods (H-Beam, I-Beam, Turbo Tuff, Pro Series) Manley camshafts Manley crankshafts Manley valvetrain components Valve springs, retainers, and hardware Every Manley component is engineered with strict quality control and race-driven innov...

View Manley Performance Products
Piston Sets - Forged - 4cyl

Piston Sets - Forged - 4cyl

Welcome to our exclusive collection of Piston Sets - Forged - 4cyl. These piston sets are engineered for performance enthusiasts looking to enhance their vehicle's power and efficiency. With a focus on quality and durability, our forged piston sets are the perfect upgrade for your 4-cylinder engine.   Key Features High Strength: Designed to withstand the extreme conditions of high-performance engines. Precision Engineering: Each piston is crafted to ensure optimal fit and function. Enhanced Performance: Improves combustion efficiency, leading to better power output. Lightweight Design: Reduces overall engine weight for improved acceleration and handling.   Why Choose Our Forged Piston Sets? Our Piston Sets - Forged - 4cyl collection is the result of extensive research and development. Here’s why you should choose our products: Manufactured using premium materials for longevity and performance. Tested rigorously to meet the highest industry standards. Suitable for both st...

View Piston Sets - Forged - 4cyl Products
Pistons

Pistons

Welcome to our Pistons collection, where quality meets performance. Whether you're a professional mechanic or a DIY enthusiast, our curated selection of pistons is designed to enhance your engine's efficiency and reliability of your engines performance.   Why Choose Our Pistons? High-Quality Materials: Our pistons are crafted from top-notch materials to ensure durability and longevity from various manufactues. Enhanced Performance: Designed to optimize your engine's performance, our pistons deliver power and efficiency for all makes and models. Wide Range: Choose from a variety of sizes and specifications to meet your specific needs from daily drivers torace cars. Competitive Pricing: Enjoy premium quality without breaking the bank.   Shop Our Pistons Collection Browse through our extensive range of pistons below: High-Performance Racing Pistons Standard Replacement Pistons Lightweight Forged Pistons Custom Fit Pistons Experience unmatched performance with our Pistons...

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

×