• Manley Performance 83mm Stroker 99.75mm +0.25mm Bore Piston Set with Rings | Subaru WRX STi (04+) (622102C-4)
  • Manley Performance 83mm Stroker 99.75mm +0.25mm Bore Piston Set with Rings | Subaru WRX STi (04+) (622102C-4)
  • Manley Performance 83mm Stroker 99.75mm +0.25mm Bore Piston Set with Rings | Subaru WRX STi (04+) (622102C-4)
  • Manley Performance 83mm Stroker 99.75mm +0.25mm Bore Piston Set with Rings | Subaru WRX STi (04+) (622102C-4)
  • Manley Performance 83mm Stroker 99.75mm +0.25mm Bore Piston Set with Rings | Subaru WRX STi (04+) (622102C-4)
  • Manley Performance 83mm Stroker 99.75mm +0.25mm Bore Piston Set with Rings | Subaru WRX STi (04+) (622102C-4)
  • Manley Performance 83mm Stroker 99.75mm +0.25mm Bore Piston Set with Rings | Subaru WRX STi (04+) (622102C-4)
  • Manley Performance 83mm Stroker 99.75mm +0.25mm Bore Piston Set with Rings | Subaru WRX STi (04+) (622102C-4)
  • Manley Performance 83mm Stroker 99.75mm +0.25mm Bore Piston Set with Rings | Subaru WRX STi (04+) (622102C-4)
  • Manley Performance 83mm Stroker 99.75mm +0.25mm Bore Piston Set with Rings | Subaru WRX STi (04+) (622102C-4)
  • Manley Performance 83mm Stroker 99.75mm +0.25mm Bore Piston Set with Rings | Subaru WRX STi (04+) (622102C-4)
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Manley Performance 83mm Stroker 99.75mm +0.25mm Bore Piston Set with Rings | Subaru WRX STi (04+) (622102C-4)

Manley Performance 83mm Stroker 99.75mm +0.25mm Bore Piston Set with Rings | Subaru WRX STi (04+) (622102C-4)

622102C-4

In stock

$679.55 USD
$760.03 USD $679.55 USD
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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 ensure optimal 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 wear resistance. These pistons are engineered to support increased performance, making them ideal for high-power applications and tuned engines. Their precise construction and material quality help improve engine efficiency and longevity, providing a reliable upgrade for serious enthusiasts and professional tuners.

Designed for Subaru WRX STI models from 2004 and newer, with an 83mm stroke and 99.75mm bore, these pistons are a direct fit for engines requiring a +0.25mm bore size and a 9.8:1 compression ratio. They are suitable for both street and track use, offering a robust solution for performance builds and engine rebuilds. Installation involves standard piston replacement procedures, and the set includes pistons and rings. These pistons are compatible with engines built for increased power output and are ideal for applications demanding high durability and consistent performance.

Overview

Manley Performance Manley 04+ Subaru WRX STi (EJ257) 83mm Stroker 99.75mm +0.25mm Bore 9.8:1 Dish Piston Set with Rings

Fitment Summary

This piston set is designed specifically for the Subaru WRX STi models equipped with the EJ257 engine, particularly from the 2004 and newer models with a 83mm stroke and 99.75mm bore.

Part #: 622102C-4

Overview

The Manley Platinum Series piston set is engineered for high-performance Subaru engine builds, offering exceptional durability and precision. Crafted from premium 2618 alloy forgings, these pistons are ideal for enthusiasts and professional tuners seeking reliable components for stroker engine projects. Designed to support increased displacement and power output, they help optimize engine response and longevity under demanding conditions.

This piston set is suitable for those looking to enhance their vehicle’s performance with a robust, high-quality upgrade that maintains factory-like reliability while supporting aggressive tuning and modifications.

Key Features

  • Manufactured from high-strength 2618 alloy forging for superior durability
  • Designed with proven cam and barrel skirt profiles for optimal stability
  • Includes tool steel wrist pins for enhanced strength and wear resistance
  • Moly skirt coatings on select parts to reduce friction and improve longevity
  • Displacement increased via 83mm stroke and 99.75mm bore for higher power potential
  • Compression ratio set at 9.8:1 for a balance of performance and reliability
  • Precision-machined to exact specifications for perfect fitment and performance

Construction & Design

The pistons feature a robust forging process using 2618 alloy, known for its excellent strength-to-weight ratio. The moly skirt coatings provide reduced friction and wear, ensuring smooth operation over extended use. The design incorporates proven profiles that support high-performance tuning while maintaining structural integrity under increased stress.

Performance & Response

These forged pistons are engineered to support stroker builds, enabling increased displacement and power output. Their precise construction helps improve engine response and throttle feel, making them suitable for high-performance applications and aggressive driving styles.

Installation & Fitment

Designed for direct replacement in compatible EJ257 engines, these pistons require standard engine assembly procedures. Proper installation ensures optimal performance and durability, making them a reliable upgrade for engine builders and tuners.

What’s Included

The package includes a complete set of pistons with rings designed for the specified bore and stroke, along with necessary hardware for installation.

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