• Manley 83mm Stroker 100mm +0.5mm Bore 8.5:1 Dish Piston Set with Rings | Subaru WRX STi (04+) (622005C-4)
  • Manley 83mm Stroker 100mm +0.5mm Bore 8.5:1 Dish Piston Set with Rings | Subaru WRX STi (04+) (622005C-4)
  • Manley 83mm Stroker 100mm +0.5mm Bore 8.5:1 Dish Piston Set with Rings | Subaru WRX STi (04+) (622005C-4)
  • Manley 83mm Stroker 100mm +0.5mm Bore 8.5:1 Dish Piston Set with Rings | Subaru WRX STi (04+) (622005C-4)
  • Manley 83mm Stroker 100mm +0.5mm Bore 8.5:1 Dish Piston Set with Rings | Subaru WRX STi (04+) (622005C-4)
  • Manley 83mm Stroker 100mm +0.5mm Bore 8.5:1 Dish Piston Set with Rings | Subaru WRX STi (04+) (622005C-4)
  • Manley 83mm Stroker 100mm +0.5mm Bore 8.5:1 Dish Piston Set with Rings | Subaru WRX STi (04+) (622005C-4)
  • Manley 83mm Stroker 100mm +0.5mm Bore 8.5:1 Dish Piston Set with Rings | Subaru WRX STi (04+) (622005C-4)
  • Manley 83mm Stroker 100mm +0.5mm Bore 8.5:1 Dish Piston Set with Rings | Subaru WRX STi (04+) (622005C-4)
  • Manley 83mm Stroker 100mm +0.5mm Bore 8.5:1 Dish Piston Set with Rings | Subaru WRX STi (04+) (622005C-4)
  • Manley 83mm Stroker 100mm +0.5mm Bore 8.5:1 Dish Piston Set with Rings | Subaru WRX STi (04+) (622005C-4)
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Manley 83mm Stroker 100mm +0.5mm Bore 8.5:1 Dish Piston Set with Rings | Subaru WRX STi (04+) (622005C-4)

Manley 83mm Stroker 100mm +0.5mm Bore 8.5:1 Dish Piston Set with Rings | Subaru WRX STi (04+) (622005C-4)

622005C-4

In stock

$679.55 USD
$760.03 USD $679.55 USD
ADDITIONAL DISCOUNTS APPLIED AT CHECKOUT Sold out

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, these pistons feature proven cam and barrel skirt profiles to enhance strength and reliability under demanding conditions. Equipped with tool steel wrist pins and moly skirt coatings on select part numbers, they deliver superior durability and consistent performance. These pistons are engineered to support increased power output and improved engine responsiveness, making them ideal for high-performance builds and tuning applications.

Suitable for 2004 and newer Subaru WRX STI models with the EJ257 engine, these 83mm stroker pistons with a 100mm bore and 8.5:1 compression ratio serve as a reliable upgrade or replacement for stock components. They are designed for professional engine builders and tuners seeking enhanced strength and longevity in high-stress environments. Installation involves standard piston replacement procedures, and the set includes pistons and rings. These pistons are perfect for street, track, or drag racing applications where durability and performance are critical.

Overview

Manley Performance Pistons

Fits 2004+ Subaru WRX STi with EJ257 engine

Part #: 622005C-4

Overview

The Manley Platinum Series piston set is designed for high-performance Subaru WRX STi engines, specifically tailored for the EJ257 platform. Crafted from premium 2618 alloy forgings, these pistons deliver exceptional strength, durability, and thermal stability, making them ideal for enthusiasts and professional tuners seeking reliable power upgrades. Whether you're building a high-horsepower street machine or a dedicated race engine, these pistons help support your performance goals with their proven design and high-quality materials. Engine builders and tuners rely on Manley's expertise to provide components that withstand the rigors of aggressive tuning while maintaining consistent performance. The 83mm stroke combined with a 100mm bore and a 8.5:1 compression ratio offers a balanced blend of power, efficiency, and longevity, making these pistons suitable for a variety of performance applications.

Key Features

Designed with precision and durability in mind, the Platinum Series pistons feature:
  • 2618 aluminum alloy forgings for superior strength and thermal resistance
  • Proven cam and barrel skirt profiles for optimal piston stability
  • Tool steel wrist pins for enhanced durability under high loads
  • Moly skirt coatings on select part numbers to reduce friction and wear
  • Optimized dish design for efficient combustion and compression
  • Precision-machined for perfect fitment and consistent performance

Construction & Design

These pistons are engineered with high-grade 2618 alloy, known for its excellent strength-to-weight ratio and thermal properties. The moly skirt coatings help reduce friction and improve wear resistance, ensuring long-term reliability. The carefully designed dish profile supports efficient combustion, contributing to improved power output and fuel efficiency.

Performance & Response

The forged construction and optimized design provide a robust foundation for high-performance builds. These pistons help support increased boost levels and aggressive tuning, offering improved response and durability under demanding conditions. They are intended to help your engine deliver consistent power and reliable operation during spirited driving or competitive racing.

Installation & Fitment

Designed specifically for the EJ257 engine in the 2004+ Subaru WRX STi, these pistons are a direct replacement for stock components. Proper installation requires standard engine assembly procedures and compatible connecting rods and rings.

What’s Included

This set includes the complete set of pistons with moly skirt coatings and rings, ready for installation in your Subaru WRX STi engine. Hardware and additional components are sold separately.
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