JE Pistons SUB STI EJ257 Block w/ EJ20 Head 99.5mm Bore CR 8.5 (Right Side) Single Piston

The JE Pistons SUB STI EJ257 Block w/ EJ20 Head is a high-performance forged piston designed for Subaru engines, specifically tailored for racing and sport compact applications. Crafted with over 75 years of expertise, JE Pistons are engineered, forged, and machined entirely in the USA to ensure maximum durability and performance. This piston features a 99.5mm bore and a compression ratio of 8.5, making it ideal for high-stress racing environments. Its premium construction provides enhanced strength, heat resistance, and consistent performance, whether on the drift track or drag strip. As a proven component in victory lane, JE Pistons deliver the reliability and power needed for demanding motorsport use.

This single piston is compatible with Subaru EJ257 blocks paired with EJ20 heads, specifically designed for the right side. It is suitable for engines built within the Subaru model range that utilize this configuration, serving as a direct replacement or upgrade for performance builds. The piston is intended for use in racing, track, or high-performance street applications, offering a precise fit for engines requiring a 99.5mm bore and 8.5 CR. Installation involves standard piston replacement procedures, ensuring a straightforward upgrade for enthusiasts seeking increased durability and power in their Subaru engines.