| Year | Make | Model |
|---|---|---|
| 1994 - 2002 | Audi | A8 Quattro |
| 2002 - 2008 | Subaru | Forester |
| 1992 - 2011 | Subaru | Impreza |
| 1989 - 2009 | Subaru | Legacy |
| 1993 - 1998 | Subaru | Legacy Touring Wagon BG |
| 2003 - 2009 | Subaru | Outback |
1
/
of
11
Manley 83mm Stroker Piston Set with Rings | Subaru WRX STI (04+) (622105C-4)
Manley 83mm Stroker Piston Set with Rings | Subaru WRX STI (04+) (622105C-4)
SKU:622105C-4
Out of stock
Regular price
$679.55 USD
Regular price
$760.03 USD
Sale price
$679.55 USD
Unit price
/
per
Couldn't load pickup availability
▶ Vehicle Fitments
The Manley Platinum Series pistons are high-performance forged components designed specifically for the Subaru WRX STI with the EJ257 engine. Crafted from 2618 alloy forging, these pistons provide exceptional strength and durability for demanding applications. They feature proven cam and barrel skirt profiles, moly skirt coatings on select part numbers, and tool steel wrist pins, ensuring reliable performance under high stress. These pistons are engineered to deliver improved power output, thermal stability, and longevity, making them ideal for serious engine builds and tuning projects. Their precise design and high-quality materials support enhanced combustion efficiency and consistent operation in high-performance scenarios.
Designed for 2011 and newer Subaru WRX STI models equipped with the EJ257 engine, these pistons are a direct upgrade or replacement for stock components. They are suitable for street, track, or racing applications where durability and performance are critical. The set includes pistons and rings, with specifications such as an 83mm stroke, 100mm bore, and a 9.8:1 compression ratio, tailored for stroker builds. Installation involves standard piston replacement procedures, and these components are compatible with the stock or aftermarket engine configurations designed for high horsepower and torque.
Share
Overview
Overview
Manley Performance Manley 04+ Subaru WRX STi (EJ257) 83mm Stroker 100mm +0.5mm Bore 9.8:1 Dish Piston Set with Rings
Fitment Summary
This piston set is designed specifically for the Subaru WRX STI models from 2004 and newer equipped with the EJ257 engine. It is ideal for enthusiasts and professional tuners seeking to enhance engine performance and durability in high-performance applications.
Part #: 622105C-4
Overview
The Manley Platinum Series piston set is engineered for high-performance Subaru EJ257 engines, offering a reliable upgrade for those building or rebuilding their turbocharged powerplants. Crafted from premium 2618 alloy forgings, these pistons deliver exceptional strength and thermal stability. Designed for enthusiasts aiming to maximize engine response, power output, and longevity, this set provides a robust foundation for custom tuning and high-stress driving conditions.
Key Features
- Manufactured from high-strength 2618 alloy forgings for durability and thermal resistance
- Designed with proven cam and barrel skirt profiles for optimal fit and performance
- Includes moly skirt coatings on select part numbers to reduce friction and wear
- Features a 83mm stroke with a 100mm bore and a 9.8:1 compression ratio for balanced power and efficiency
- Equipped with precision-machined tool steel wrist pins for secure fitment
- Dish piston design helps optimize compression and combustion efficiency
- Engineered to support high-performance tuning and aggressive driving styles
Construction & Design
The pistons are crafted from premium 2618 aluminum alloy, known for its excellent strength-to-weight ratio and thermal properties. The moly skirt coatings enhance wear resistance, ensuring long-term reliability under demanding conditions. The precise machining and profiling are tailored to fit the EJ257 engine, providing a seamless upgrade for rebuilds or performance builds.
Driving Feel & Feedback
These pistons help support increased engine response and power delivery, making your Subaru WRX STI more responsive and capable during spirited driving or tuning sessions. The design promotes efficient combustion and heat management, contributing to a more consistent and reliable driving experience.
Installation & Fitment
Designed for direct replacement in 2004+ Subaru WRX STI models with the EJ257 engine, installation should be performed by qualified technicians familiar with engine rebuilds. Proper clearances and assembly procedures are essential for optimal performance and longevity.
What’s Included
The package includes a complete set of pistons with rings and necessary hardware for a comprehensive rebuild or upgrade.
