• Manley 75mm DE-STROKED 99.5mm STD Bore Dish Piston Set w/ Rings | Subaru WRX STi (04+) (621100C-1)
  • Manley 75mm DE-STROKED 99.5mm STD Bore Dish Piston Set w/ Rings | Subaru WRX STi (04+) (621100C-1)
  • Manley 75mm DE-STROKED 99.5mm STD Bore Dish Piston Set w/ Rings | Subaru WRX STi (04+) (621100C-1)
  • Manley 75mm DE-STROKED 99.5mm STD Bore Dish Piston Set w/ Rings | Subaru WRX STi (04+) (621100C-1)
  • Manley 75mm DE-STROKED 99.5mm STD Bore Dish Piston Set w/ Rings | Subaru WRX STi (04+) (621100C-1)
  • Manley 75mm DE-STROKED 99.5mm STD Bore Dish Piston Set w/ Rings | Subaru WRX STi (04+) (621100C-1)
  • Manley 75mm DE-STROKED 99.5mm STD Bore Dish Piston Set w/ Rings | Subaru WRX STi (04+) (621100C-1)
  • Manley 75mm DE-STROKED 99.5mm STD Bore Dish Piston Set w/ Rings | Subaru WRX STi (04+) (621100C-1)
  • Manley 75mm DE-STROKED 99.5mm STD Bore Dish Piston Set w/ Rings | Subaru WRX STi (04+) (621100C-1)
  • Manley 75mm DE-STROKED 99.5mm STD Bore Dish Piston Set w/ Rings | Subaru WRX STi (04+) (621100C-1)
  • Manley 75mm DE-STROKED 99.5mm STD Bore Dish Piston Set w/ Rings | Subaru WRX STi (04+) (621100C-1)
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Manley 75mm DE-STROKED 99.5mm STD Bore Dish Piston Set w/ Rings | Subaru WRX STi (04+) (621100C-1)

Manley 75mm DE-STROKED 99.5mm STD Bore Dish Piston Set w/ Rings | Subaru WRX STi (04+) (621100C-1)

621100C-1

In stock

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

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 power output and boost levels, making them ideal for professional engine builders and tuners seeking consistent, high-quality performance. Their precise construction and material selection contribute to improved combustion efficiency and thermal stability, enhancing overall engine performance.

Designed for 2011 and newer Subaru WRX STi models with the EJ257 engine, these pistons are a direct replacement for stock components in high-performance builds. They are suitable for applications involving tuning, forced induction, and track use, providing a reliable upgrade for enthusiasts aiming to maximize engine output. The set includes pistons and rings, ensuring a complete upgrade for rebuilds or performance enhancements. Installation typically involves standard piston replacement procedures, and compatibility with stock or aftermarket components should be verified. These pistons are ideal for street, track, and racing applications where durability and performance are paramount.

Overview

Manley Performance Pistons

Fits 2004+ Subaru WRX STi with EJ257 Engine

Part #: 621100C-1

Overview

The Manley Platinum Series piston set is engineered for high-performance Subaru WRX STi engines, specifically designed to enhance durability and power potential. Crafted from premium 2618 alloy forgings, these pistons are ideal for enthusiasts and professional tuners seeking reliable, race-ready components. Whether you're building a high-horsepower street machine or a dedicated track car, these pistons provide the strength and consistency needed for demanding applications. Their advanced design supports improved combustion efficiency and heat management, contributing to overall engine longevity and performance. Match your vehicle's performance goals with pistons that are built to withstand the rigors of aggressive tuning and spirited driving. The set includes precision-machined components that ensure proper fitment and optimal operation, making them a trusted choice for engine builders aiming for top-tier results.

Key Features

Designed with durability and performance in mind, the Manley Platinum Series pistons feature:
  • 2618 aluminum alloy forgings for superior strength and thermal stability
  • Proven cam and barrel skirt profiles for reduced friction and enhanced durability
  • Tool steel wrist pins for reliable connection and wear resistance
  • Moly skirt coatings on select part numbers to reduce piston slap and improve wear characteristics
  • 75mm bore size tailored for EJ257 engines
  • 75mm stroke with a 99.5mm bore for a 9.8:1 compression ratio
  • Optimized dish design for efficient combustion and power output

Construction & Design

These pistons are meticulously engineered with high-grade materials and precision machining to ensure consistent quality and performance. The moly-coated skirts help reduce friction and wear, while the forged alloy construction provides the strength necessary for high-stress applications. The design supports reliable operation under increased boost and horsepower levels, making them suitable for heavily modified engines.

Performance & Response

The Platinum Series pistons are designed to support higher compression ratios and boost levels, helping your engine respond more effectively to tuning modifications. Their robust construction ensures consistent combustion and helps maintain engine integrity during aggressive driving or racing conditions.

Installation & Fitment

These pistons are intended for professional engine builds or experienced enthusiasts familiar with high-performance Subaru engine assembly. Proper installation requires precise machining and assembly to ensure optimal performance and longevity.

What’s Included

The package includes a complete set of pistons with moly-coated skirts and necessary hardware for installation, designed specifically for the EJ257 engine in Subaru WRX STi models from 2004 onward.

Ideal For

Perfect for engine builders, tuners, and Subaru enthusiasts looking to upgrade their engine's durability and power capacity for high-performance applications.
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