The Manley Performance EH257 piston is a high-performance, single-piston component designed for Subaru WRX and STI models from 2004 onward. Part of the Platinum Series, it features 2618 alloy forgings, which provide exceptional strength and durability under demanding conditions. The piston incorporates proven cam and barrel skirt profiles to optimize engine performance and reduce friction. Tool steel wrist pins enhance reliability, while moly skirt coatings on select part numbers improve wear resistance. These features collectively deliver superior performance, longevity, and consistent operation for tuned and professional engines.
This piston is specifically designed for 2004+ Subaru WRX and STI models with an 8.5:1 compression ratio and a 99.50mm bore. It serves as a direct replacement or upgrade for stock pistons, suitable for street, track, or performance applications. Installation is straightforward for experienced engine builders, and the kit includes a single piston with the specified specifications. Ideal for enthusiasts seeking reliable, high-quality components for engine rebuilds or upgrades, this piston ensures durability and performance in demanding driving conditions.
