• Manley 99.75mm STD Stroke +.25mm Bore Dish Single Piston and Ring | Subaru WRX STi (04+) (612002C-1)
  • Manley 99.75mm STD Stroke +.25mm Bore Dish Single Piston and Ring | Subaru WRX STi (04+) (612002C-1)
  • Manley 99.75mm STD Stroke +.25mm Bore Dish Single Piston and Ring | Subaru WRX STi (04+) (612002C-1)
  • Manley 99.75mm STD Stroke +.25mm Bore Dish Single Piston and Ring | Subaru WRX STi (04+) (612002C-1)
  • Manley 99.75mm STD Stroke +.25mm Bore Dish Single Piston and Ring | Subaru WRX STi (04+) (612002C-1)
  • Manley 99.75mm STD Stroke +.25mm Bore Dish Single Piston and Ring | Subaru WRX STi (04+) (612002C-1)
  • Manley 99.75mm STD Stroke +.25mm Bore Dish Single Piston and Ring | Subaru WRX STi (04+) (612002C-1)
  • Manley 99.75mm STD Stroke +.25mm Bore Dish Single Piston and Ring | Subaru WRX STi (04+) (612002C-1)
  • Manley 99.75mm STD Stroke +.25mm Bore Dish Single Piston and Ring | Subaru WRX STi (04+) (612002C-1)
  • Manley 99.75mm STD Stroke +.25mm Bore Dish Single Piston and Ring | Subaru WRX STi (04+) (612002C-1)
  • Manley 99.75mm STD Stroke +.25mm Bore Dish Single Piston and Ring | Subaru WRX STi (04+) (612002C-1)
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Manley 99.75mm STD Stroke +.25mm Bore Dish Single Piston and Ring | Subaru WRX STi (04+) (612002C-1)

Manley 99.75mm STD Stroke +.25mm Bore Dish Single Piston and Ring | Subaru WRX STi (04+) (612002C-1)

612002C-1

In stock

$169.89 USD
$190.01 USD $169.89 USD
ADDITIONAL DISCOUNTS APPLIED AT CHECKOUT Sold out

The Manley Platinum Series pistons for the 2004+ Subaru WRX STi with the EJ257 engine are high-performance forged components designed to enhance engine durability and power output. Crafted from 2618 alloy, these pistons feature proven cam and barrel skirt profiles, moly skirt coatings on select part numbers, and tool steel wrist pins to withstand high-stress conditions. Their design ensures superior strength, heat resistance, and consistent performance under demanding tuning and racing applications. These pistons are ideal for enthusiasts seeking reliable, high-quality components for engine builds that demand durability and precision.

Specifically engineered for the 2004 to 2025 Subaru WRX STi models with the EJ257 engine, these pistons have a standard stroke of 99.75mm and a bore of 8.5:1 dish, making them suitable for performance upgrades and rebuilds. They serve as direct replacements or performance upgrades for stock pistons, supporting increased horsepower and boost levels. The kit includes a single piston with rings, designed for professional engine builders and tuners aiming for consistent, high-performance results in street or track environments. Proper installation ensures optimal fitment and long-term reliability.

Overview

Manley Performance Pistons

Fitment Summary

Part #: 612002C-1

Overview

The Manley Platinum Series pistons are engineered for high-performance Subaru WRX STi enthusiasts and professional engine builders seeking durability and precision. Designed specifically for the EJ257 engine, these pistons feature a 99.75mm stroke with a +0.25mm bore, optimized for increased displacement and power potential. Crafted from 2618 alloy forging, they offer excellent strength and thermal stability, making them ideal for both daily driving and aggressive tuning applications. The pistons are tailored to support high-performance builds, providing reliable operation under demanding conditions while maintaining excellent wear resistance and longevity. Whether you're rebuilding your engine or enhancing its performance, these pistons deliver consistent, high-quality results. Their proven cam and barrel skirt profiles ensure proper ring sealing and reduced piston slap, contributing to smoother operation and improved response. The moly skirt coatings on select part numbers further reduce friction and wear, supporting engine longevity even under high stress.

Key Features

Built with advanced materials and precision engineering, the Manley Platinum Series pistons offer several key benefits:

  • Made from 2618 alloy forging for superior strength and thermal management
  • Designed with proven cam and barrel skirt profiles for optimal sealing and durability
  • Tool steel wrist pins for enhanced strength and reliability
  • Moly skirt coatings on select models to reduce friction and wear
  • Specifically engineered for the EJ257 engine in Subaru WRX STi models
  • Optimized for high-performance and forced induction applications
  • Precision-machined for perfect fit and consistent performance

Construction & Design

The pistons are constructed from high-grade 2618 alloy forging, known for its excellent strength-to-weight ratio and thermal properties. The design incorporates proven cam and barrel skirt profiles to ensure proper ring sealing and minimize piston slap, enhancing engine response and longevity. The moly skirt coatings on select part numbers provide additional wear resistance and reduced friction, supporting sustained high-performance operation.

Performance & Response

These pistons are designed to support increased power output and boost levels, making them suitable for tuned engines and high-stress driving conditions. Their robust construction helps maintain consistent compression and combustion efficiency, contributing to improved throttle response and overall engine performance.

Installation & Fitment

Installation requires standard engine rebuild procedures, including proper piston ring and bearing installation. Precise machining ensures a direct fit for the EJ257 engine in Subaru WRX STi models, providing a reliable upgrade for performance enthusiasts.

What’s Included

The package includes a set of forged pistons designed specifically for the EJ257 engine, with all necessary components for installation. Hardware and additional accessories are sold separately.
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