• Manley 2.5L EJ257 Piston | Subaru WRX STI (99.75mm Bore) (621002C-1)
  • Manley 2.5L EJ257 Piston | Subaru WRX STI (99.75mm Bore) (621002C-1)
  • Manley 2.5L EJ257 Piston | Subaru WRX STI (99.75mm Bore) (621002C-1)
  • Manley 2.5L EJ257 Piston | Subaru WRX STI (99.75mm Bore) (621002C-1)
  • Manley 2.5L EJ257 Piston | Subaru WRX STI (99.75mm Bore) (621002C-1)
  • Manley 2.5L EJ257 Piston | Subaru WRX STI (99.75mm Bore) (621002C-1)
  • Manley 2.5L EJ257 Piston | Subaru WRX STI (99.75mm Bore) (621002C-1)
  • Manley 2.5L EJ257 Piston | Subaru WRX STI (99.75mm Bore) (621002C-1)
  • Manley 2.5L EJ257 Piston | Subaru WRX STI (99.75mm Bore) (621002C-1)
  • Manley 2.5L EJ257 Piston | Subaru WRX STI (99.75mm Bore) (621002C-1)
  • Manley 2.5L EJ257 Piston | Subaru WRX STI (99.75mm Bore) (621002C-1)
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Manley 2.5L EJ257 Piston | Subaru WRX STI (99.75mm Bore) (621002C-1)

Manley 2.5L EJ257 Piston | Subaru WRX STI (99.75mm Bore) (621002C-1)

621002C-1

In stock

$174.81 USD
$190.01 USD $174.81 USD
ADDITIONAL DISCOUNTS APPLIED AT CHECKOUT Sold out

The Manley Platinum Series pistons are high-performance forged components designed for Subaru WRX STI models equipped with the 2.5L EJ257 engine. Crafted from 2618 alloy forging, these pistons provide exceptional strength and durability under high-stress conditions. They feature proven cam and barrel skirt profiles, moly skirt coatings on select part numbers, and tool steel wrist pins, ensuring reliable operation during aggressive tuning and racing applications. These pistons are engineered to deliver improved power output, thermal stability, and longevity, making them ideal for professional engine builders and tuners seeking superior performance.

Designed specifically for 2015–2021 Subaru WRX STI models with the EJ257 engine, these 99.75 mm bore, 1.285-inch compression height, and 18.00 cc dish pistons serve as direct replacements or performance upgrades. They are suitable for high-performance street, track, and racing setups, providing increased compression ratios and optimized combustion. Installation involves standard piston replacement procedures, and the kit includes the pistons with moly skirt coatings and wrist pins. These pistons are compatible with forged or aftermarket connecting rods and are intended for use in high-performance rebuilds and tuning projects.

Overview

Manley Performance Pistons

Fitment Summary

Part #: 621002C-1

Overview

The Manley Subaru WRX STI 2.5L EJ257 99.75 Mm Bore 1.285 In. CH 18.00 CC Dish Piston is a high-performance engine component designed for serious tuners and engine builders seeking durability and precision. Crafted from premium 2618 alloy forgings, these pistons are engineered to withstand the rigors of high-performance applications, providing reliable power support and enhanced engine response. Ideal for those looking to maximize the potential of their Subaru WRX STI, these pistons help improve combustion efficiency and overall engine longevity, making them a valuable upgrade for both street and track use.

Key Features

Built with advanced materials and precision engineering, these pistons feature a proven cam and barrel skirt profile for optimal stability and reduced piston slap. The moly skirt coatings on select part numbers reduce friction and wear, supporting long-term durability. Equipped with tool steel wrist pins, these pistons ensure secure and reliable connection to the connecting rods. The dish design provides the necessary clearance for high compression setups, supporting performance tuning and power gains without sacrificing engine reliability.

Construction & Design

Manufactured from high-quality 2618 alloy forgings, these pistons are designed for strength and thermal stability. The carefully engineered skirt coatings and precise machining contribute to consistent performance and durability under demanding conditions.

Performance & Response

These pistons are intended to support high-performance builds by enhancing combustion efficiency and reducing heat transfer. Their robust construction helps maintain optimal piston shape and function during aggressive driving or tuning, contributing to improved throttle response and engine stability.

Installation & Fitment

Designed specifically for the Subaru WRX STI 2.5L EJ257 engine, these pistons are compatible with stock or upgraded engine components. Proper installation requires standard engine rebuild procedures, ensuring a precise fit and reliable operation.

What’s Included

This package includes a set of single dish pistons crafted to match the specifications of the EJ257 engine, ready for installation in your high-performance build.
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