JE Pistons Subaru EJ25 Ultra Series 8.5:1 (Set of 4)

The JE Pistons Subaru EJ25 Ultra Series 8.5:1 set of four forged pistons is designed to deliver maximum strength and durability for high-performance Subaru EJ25 engines. Built with JE’s proprietary Aligned Grain Flow forging technology, these pistons provide exceptional tensile strength, making them suitable for extreme cylinder pressures encountered in power adder builds. Equipped with features such as thermal barrier crown coating, skirt coating, and gas ports, the Ultra Series pistons are engineered for high-boost applications and demanding engine modifications. As with all JE Pistons products, these pistons are manufactured entirely in the USA, ensuring quality and precision for performance enthusiasts.

These pistons are compatible with Subaru EJ25 engines, typically found in models from the late 1990s to early 2000s, and serve as a high-performance upgrade for turbocharged or supercharged builds. They are intended for use in engines requiring a compression ratio of 8.5:1, making them suitable for street and track applications where strength and reliability are critical. The set is a direct replacement for OEM pistons, designed for bolt-on installation in compatible EJ25 engines. Ideal for high-boost, forced induction setups, these pistons support increased power output and engine longevity under extreme conditions.