• Manley 04+ Subaru WRX STI EJ257 STD Stroke 100mm +.5mm Bore 8.5:1 Dish Single Piston with Rings | Subaru WRX STI (04+) (612005C-1)
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 100mm +.5mm Bore 8.5:1 Dish Single Piston with Rings | Subaru WRX STI (04+) (612005C-1)
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 100mm +.5mm Bore 8.5:1 Dish Single Piston with Rings | Subaru WRX STI (04+) (612005C-1)
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 100mm +.5mm Bore 8.5:1 Dish Single Piston with Rings | Subaru WRX STI (04+) (612005C-1)
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 100mm +.5mm Bore 8.5:1 Dish Single Piston with Rings | Subaru WRX STI (04+) (612005C-1)
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 100mm +.5mm Bore 8.5:1 Dish Single Piston with Rings | Subaru WRX STI (04+) (612005C-1)
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 100mm +.5mm Bore 8.5:1 Dish Single Piston with Rings | Subaru WRX STI (04+) (612005C-1)
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 100mm +.5mm Bore 8.5:1 Dish Single Piston with Rings | Subaru WRX STI (04+) (612005C-1)
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 100mm +.5mm Bore 8.5:1 Dish Single Piston with Rings | Subaru WRX STI (04+) (612005C-1)
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 100mm +.5mm Bore 8.5:1 Dish Single Piston with Rings | Subaru WRX STI (04+) (612005C-1)
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 100mm +.5mm Bore 8.5:1 Dish Single Piston with Rings | Subaru WRX STI (04+) (612005C-1)
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Manley 04+ Subaru WRX STI EJ257 STD Stroke 100mm +.5mm Bore 8.5:1 Dish Single Piston with Rings | Subaru WRX STI (04+) (612005C-1)

Manley 04+ Subaru WRX STI EJ257 STD Stroke 100mm +.5mm Bore 8.5:1 Dish Single Piston with Rings | Subaru WRX STI (04+) (612005C-1)

612005C-1

In stock

$169.89 USD
$190.01 USD $169.89 USD
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The Manley Platinum Series pistons for the 2004 and newer Subaru WRX STi with the EJ257 engine are high-performance replacement components designed to enhance engine durability and power output. Crafted from 2618 alloy forgings, these pistons feature proven cam and barrel skirt profiles for optimal strength and reliability under demanding conditions. Equipped with tool steel wrist pins and moly skirt coatings on select models, they provide superior wear resistance and thermal stability. These pistons are engineered to deliver consistent performance, making them ideal for high-performance builds, tuning applications, and motorsport use. Their robust construction ensures longevity and the ability to withstand increased boost and aggressive tuning setups.

Designed specifically for 2004+ Subaru WRX STi models with the EJ257 engine, these pistons are a direct replacement for stock components, offering a reliable upgrade for enthusiasts seeking improved performance. The 100mm stroke and +0.5mm bore size are tailored to match the engine's specifications, ensuring proper fitment and seamless installation. Suitable for street, track, or drag applications, they are compatible with standard or upgraded engine setups. The kit includes single pistons with rings, providing everything needed for installation. These pistons are ideal for engine rebuilds, performance upgrades, and tuning projects aimed at maximizing power and durability.

Overview

Manley Performance Pistons

Fits 2004+ Subaru WRX STi with EJ257 Engine

Part #: 612005C-1

Overview

These Manley Platinum Series pistons are engineered for high-performance Subaru WRX STi enthusiasts and professional engine builders seeking durability and reliable power support. Crafted from premium 2618 alloy forgings, these pistons are designed to withstand the rigors of aggressive tuning and spirited driving. Their precise cam and barrel skirt profiles ensure optimal fitment and consistent performance, making them an excellent choice for those looking to enhance their engine's response and longevity. Whether you're building a race-ready setup or upgrading for daily driving, these pistons provide a solid foundation for your engine build.

Key Features

Our Platinum Series pistons feature advanced materials and design elements to support your engine's performance goals:
  • Made from high-strength 2618 alloy forgings for superior durability
  • Designed with proven cam and barrel skirt profiles for optimal clearance and stability
  • Tool steel wrist pins for enhanced strength and reliability
  • Moly skirt coatings on select part numbers to reduce friction and wear
  • Standard stroke of 100mm with a +0.5mm bore increase for increased displacement
  • Compression ratio of 8.5:1, suitable for boosted applications
  • Precision-machined for exact fitment in EJ257 engines

Construction & Design

These pistons are meticulously engineered with high-quality materials and coatings to ensure longevity and consistent performance. The moly skirt coatings help reduce friction and wear, supporting engine efficiency and durability during high-stress conditions.

Performance & Response

Designed to support high-performance builds, these pistons help improve engine response and power output. Their robust construction ensures reliable operation under increased boost pressures and aggressive tuning, making them ideal for enthusiasts aiming for enhanced acceleration and overall engine responsiveness.

Installation & Fitment

These pistons are intended for use with the EJ257 engine found in 2004 and newer Subaru WRX STi models. Proper installation requires standard engine rebuilding procedures, and professional assembly is recommended to ensure optimal performance and longevity.

What’s Included

The package includes a set of forged pistons with moly skirt coatings and tool steel wrist pins, ready for installation in your EJ257 engine. Additional hardware or components are not included.
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