For Subaru EJ25

• California Prop 65 Warning: Cancer and Reproductive Harm - https://www.p65warnings.ca.gov/
• Type: Piston Set
• UPC: 193564045416

The JE Ultra Series Pistons are engineered for high-performance Subaru EJ25 engines, making them ideal for high-horsepower and racing applications. These pistons are forged using JE's proprietary Aligned Grain Flow Technology, which enhances tensile strength to endure extreme cylinder pressures and stresses in demanding engine builds. The pistons feature an inverted dome/dish design with a 3.927-inch bore, a 1.209-inch compression distance, and a 0.905-inch wrist pin. Key features include a skirt coating that minimizes friction and wear, reducing operating noise, especially during cold starts. The thermal barrier crown coating reflects heat into the combustion chamber, lowering piston crown temperatures and improving exhaust gas scavenging. High-strength wrist pins, designed for high-performance builds, provide durability under intense conditions. Lateral gas ports ensure optimal sealing of the top compression ring even at high RPM and boost levels, while enhanced pin oiling reduces heat, friction, and wear for improved reliability. This piston set is optimized for turbocharged and high-boost applications, offering custom-level performance features off the shelf. It is a complete set of four pistons, specifically tailored for Subaru EJ engines.