JE Pistons Subaru EJ257 Block with EJ20 Head 99.75mm Bore Piston Kit – High-Performance Forged Pistons for Subaru WRX STI

Description

Upgrade your Subaru WRX STI with the JE Pistons EJ257 Block with EJ20 Head 99.75mm Bore Piston Kit, designed for optimal performance and durability. Crafted from high-quality 2618 aluminum, these forged pistons are engineered and machined entirely in the USA to meet the demands of high-performance applications. The kit includes four pistons, high-quality wrist pins, locks, and JE Pro Seal premium piston rings, providing a complete solution for engine builders and enthusiasts.

JE Pistons are renowned for their innovative design and proven performance in racing environments, from drift tracks to drag strips. Each piston features a proprietary Forged Side Relief (FSR) forging design, which minimizes friction and power loss by reducing skirt width and shortening the wrist pin, contributing to increased efficiency and engine responsiveness. The inclusion of an accumulator groove (application-dependent) helps reduce pressure from combustion gases, decreasing ring flutter and enhancing ring seal, leading to consistent power delivery.

The piston skirts are coated (application-dependent) to reduce friction and wear on the piston skirts and cylinder walls, while also lowering operating noise, resulting in quieter, more reliable engine operation. Designed specifically for each engine and application, these pistons optimize performance and durability, ensuring they perform under demanding conditions. Manufactured entirely in the USA using premium materials, they deliver high tensile strength necessary for high-demand performance applications.

This piston kit is not carb-approved and requires acknowledgment of Prop 65 compliance. It is suitable for air freight shipping and is ideal for racing or high-performance rebuilds where maximum durability and performance are required.

Features:

• Proprietary Forged Side Relief (FSR) forging design reduces friction and power loss with a shorter wrist pin

• Accumulator groove helps reduce pressure from combustion gases, improving ring seal and power consistency

• Skirt coating reduces friction, wear, and noise for smoother engine operation

• Forged in the USA from 2618 aluminum for high tensile strength and durability

• Engineered specifically for Subaru EJ257 with EJ20 head for optimized performance

• Includes high-quality wrist pins, locks, and JE Pro Seal premium piston rings for complete assembly