The Manley Performance EH257 piston set is a high-performance component designed for Subaru WRX and STI models from 2004 onward. Part of the Platinum Series, these pistons are crafted from 2618 alloy forgings, offering exceptional strength and durability for demanding applications. They feature proven cam and barrel skirt profiles to optimize engine efficiency and reliability. Equipped with tool steel wrist pins and moly skirt coatings on select part numbers, these pistons deliver superior wear resistance and thermal stability. The design emphasizes performance, durability, and consistent power output, making them ideal for serious tuners and professional engine builders seeking reliable, high-quality components.
This piston set is specifically engineered for 2004+ Subaru WRX and STI models with a 100.0mm bore and a +0.50mm size, featuring an 8.5:1 compression ratio with a dish design. It serves as a direct replacement or upgrade for stock pistons, suitable for both street and track use. Installation involves standard piston replacement procedures, and the set includes all necessary components for a complete upgrade. Compatible with engines requiring these specifications, this set enhances performance and durability in high-performance or modified applications.
