• Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.75mm +.25mm Bore 9.8:1 Dish Piston | Subaru WRX STI (04+)
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.75mm +.25mm Bore 9.8:1 Dish Piston | Subaru WRX STI (04+)
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.75mm +.25mm Bore 9.8:1 Dish Piston | Subaru WRX STI (04+)
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.75mm +.25mm Bore 9.8:1 Dish Piston | Subaru WRX STI (04+)
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.75mm +.25mm Bore 9.8:1 Dish Piston | Subaru WRX STI (04+)
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.75mm +.25mm Bore 9.8:1 Dish Piston | Subaru WRX STI (04+)
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.75mm +.25mm Bore 9.8:1 Dish Piston | Subaru WRX STI (04+)
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.75mm +.25mm Bore 9.8:1 Dish Piston | Subaru WRX STI (04+)
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.75mm +.25mm Bore 9.8:1 Dish Piston | Subaru WRX STI (04+)
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.75mm +.25mm Bore 9.8:1 Dish Piston | Subaru WRX STI (04+)
  • Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.75mm +.25mm Bore 9.8:1 Dish Piston | Subaru WRX STI (04+)
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Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.75mm +.25mm Bore 9.8:1 Dish Piston | Subaru WRX STI (04+)

Manley 04+ Subaru WRX STI EJ257 STD Stroke 99.75mm +.25mm Bore 9.8:1 Dish Piston | Subaru WRX STI (04+)

612102C-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 feature proven cam and barrel skirt profiles to ensure optimal engine performance and durability under demanding conditions. Equipped with tool steel wrist pins and moly skirt coatings on select part numbers, they provide excellent wear resistance and thermal stability. These pistons are engineered to deliver consistent power output, improved combustion efficiency, and enhanced longevity, making them ideal for both street and track applications.

Designed for 2004 and newer Subaru WRX STi models with the EJ257 engine, these standard stroke 99.75mm bore pistons with a +0.25mm bore size and a 9.8:1 compression ratio serve as a reliable upgrade or replacement for stock components. They are suitable for high-performance builds, tuning, and motorsport use, offering superior strength and performance. Installation involves standard piston replacement procedures, and the kit includes the pistons with moly skirt coatings and tool steel wrist pins. These pistons are perfect for enthusiasts seeking durability and consistent power in their turbocharged Subaru engines.

Overview

Manley Performance Pistons

Fitment Summary

Designed specifically for the Subaru WRX STI with the EJ257 engine, these pistons are optimized for 2004 and newer models equipped with the 2.5L turbocharged boxer engine.

Part #: 612102C-1

Overview

The Manley 04+ Subaru WRX STI STD Stroke 99.75mm +.25mm Bore 9.8:1 Dish Piston is a high-performance component crafted for serious engine builders and tuners seeking durability and reliable power support. These pistons are engineered to withstand the rigors of high-performance applications while maintaining precise fitment and consistent operation. Whether you're rebuilding or upgrading your engine, these pistons help optimize combustion efficiency and support enhanced engine response, making them ideal for both daily driving and competitive racing setups.

Key Features

  • Constructed from 2618 alloy forging for superior strength and durability
  • Designed with proven cam and barrel skirt profiles for optimal stability
  • Includes tool steel wrist pins for enhanced wear resistance
  • Features moly skirt coatings on select part numbers to reduce friction and improve longevity
  • Displacement optimized with a 99.75mm bore and standard stroke for reliable performance
  • Compression ratio set at 9.8:1, suitable for a variety of tuning setups
  • Precision-machined for exact fitment in EJ257 engines

Construction & Design

These pistons are crafted from high-grade 2618 aluminum alloy, known for its excellent strength-to-weight ratio and thermal stability. The design incorporates proven cam and barrel skirt profiles that promote stability under high RPM and boost conditions. Moly skirt coatings are applied on select part numbers to minimize friction and wear, ensuring long-lasting performance in demanding environments.

Performance & Response

Engineered to support high-performance builds, these pistons help improve combustion efficiency and response. Their robust construction provides the durability needed for aggressive tuning and spirited driving, while maintaining consistent operation over time.

Installation & Fitment

Designed as a direct replacement for OEM pistons in the EJ257 engine, installation requires standard engine rebuilding procedures. Proper clearance and assembly are essential for optimal performance and longevity.

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