• Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston | Subaru WRX STI
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston | Subaru WRX STI
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston | Subaru WRX STI
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston | Subaru WRX STI
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston | Subaru WRX STI
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston | Subaru WRX STI
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston | Subaru WRX STI
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston | Subaru WRX STI
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston | Subaru WRX STI
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston | Subaru WRX STI
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston | Subaru WRX STI
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Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston | Subaru WRX STI

Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston | Subaru WRX STI

612000C-1

In stock

$169.89 USD
$190.01 USD $169.89 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 offer exceptional strength and thermal stability, making them ideal for demanding applications. Features include proven cam and barrel skirt profiles, tool steel wrist pins, and moly skirt coatings on select part numbers, all contributing to enhanced durability and consistent performance. These pistons are engineered to withstand high horsepower and boost levels, providing reliable operation in tuned and modified engines. Their precise construction ensures optimal combustion efficiency and reduced piston slap, making them a preferred choice among professional engine builders and tuners seeking quality and longevity.

Designed for 2004 and newer Subaru WRX STi models equipped with the EJ257 engine, these STD stroke (99.5mm) and bore (8.5:1 compression ratio) pistons serve as a direct replacement or upgrade for stock components. They are suitable for street, track, and high-performance applications where durability and performance are critical. Installation involves standard piston replacement procedures, and the kit includes a single piston assembly. These pistons are ideal for enthusiasts looking to build a reliable, high-performance engine capable of handling increased power levels while maintaining OEM-like fitment and functionality.

Overview

Manley Performance

Fitment Summary

Part #: 612000C-1

Overview

The Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.5mm STD Bore 8.5:1 Dish Piston is a high-performance engine component designed for serious tuners and engine builders seeking durability and consistent power output. Crafted from premium 2618 alloy forgings, these pistons are engineered to withstand the rigors of high-performance applications while maintaining excellent thermal stability. Ideal for rebuilds, upgrades, or custom engine builds, this piston helps ensure reliable operation and optimal compression for your Subaru WRX STi's EJ257 engine.

This piston is tailored for enthusiasts aiming to enhance their vehicle’s performance with a robust, proven component that supports high-revving, turbocharged engines. Whether you're rebuilding your engine or upgrading for increased power, these pistons provide a reliable foundation for your project.

Key Features

Designed with performance and durability in mind, the Manley Platinum Series pistons feature:

  • 2618 aluminum alloy forgings for strength and thermal stability
  • Proven cam and barrel skirt profiles for optimized piston movement
  • Tool steel wrist pins for enhanced durability and wear resistance
  • Moly skirt coatings on select part numbers to reduce friction and improve longevity
  • Standard stroke of 99.5mm and bore of 86mm for precise fitment
  • Dished piston design to support 8.5:1 compression ratio
  • Engineered for high-performance turbocharged applications

Construction & Design

The pistons are meticulously machined from high-quality 2618 alloy forgings, known for their exceptional strength-to-weight ratio and thermal properties. The moly skirt coatings reduce friction and wear, extending piston life under demanding conditions. The design incorporates proven profiles to ensure smooth piston operation and optimal clearance within the EJ257 engine block.

Performance & Response

These pistons are crafted to support high-revving, turbocharged engines, helping to improve response and power delivery. Their robust construction ensures consistent performance under increased boost pressures, making them suitable for tuned or heavily modified engines.

Installation & Fitment

Designed specifically for the 2004 and newer Subaru WRX STi models equipped with the EJ257 engine, these pistons are intended for rebuilds and performance upgrades. Proper installation requires standard engine assembly procedures and compatibility checks.

What’s Included

This product includes a single piston designed for use with the specified engine. Additional components such as rings, pins, and hardware are not included and should be sourced separately based on your build requirements.

Ideal For

This piston is ideal for professional engine builders, tuners, and automotive enthusiasts looking to upgrade or rebuild their Subaru WRX STi's engine for enhanced durability and performance. Perfect for high-performance applications, including street and track use.
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