The Manley Performance EH257 piston set is a high-performance, extreme duty component designed for Subaru WRX and STI models from 2004 onward. Part of the Platinum Series, these pistons are crafted from 2618 alloy forgings, ensuring exceptional strength and durability under demanding conditions. They feature proven cam and barrel skirt profiles for reliable operation, along with moly skirt coatings on select part numbers to reduce friction and wear. Equipped with tool steel wrist pins, these pistons deliver superior performance and longevity, making them ideal for high-stress applications such as tuning and racing.
Designed specifically for 2004+ Subaru WRX and STI models with a 99.75mm bore and +0.25mm size, these pistons serve as a direct replacement or upgrade for stock components. They are suitable for use in performance builds focused on increased power and durability, whether on the street or track. Installation involves standard bolt-on procedures, and the set provides all necessary components for a reliable upgrade. These pistons are favored by professional engine builders and tuners seeking consistent, high-quality performance.
