JE Pistons Ultra Series Subaru EJ257 99.75mm Bore 9.5:1 CR Set of 4 Pistons

The JE Pistons Ultra Series Subaru EJ257 set of four forged pistons is designed for high-performance engine builds. Constructed with JE’s proprietary Aligned Grain Flow forging technology, these pistons offer exceptional tensile strength to withstand the extreme cylinder pressures associated with power adder applications. Featuring thermal barrier crown coating, skirt coating, and gas ports, the Ultra Series pistons deliver enhanced durability, heat resistance, and consistent performance under demanding conditions. Made entirely in the USA, they are engineered to provide reliable, high-level performance for serious enthusiasts and professional tuners seeking top-tier quality and strength.

These pistons are specifically designed for Subaru EJ257 engines with a 99.75mm bore and a 9.5:1 compression ratio. They serve as direct replacements or upgrades for Subaru models equipped with this engine, suitable for high-boost, street, or track use. The set is ideal for custom turbo builds and performance tuning, ensuring optimal fitment and durability in demanding applications. Installation is straightforward for qualified technicians, and these pistons are intended for use in high-performance, forced induction engine setups.