The Manley Performance EH257 Extreme Duty Piston Set is a high-performance piston designed for Subaru WRX and STI models from 2004 onward. Part of the Platinum Series, these pistons feature 2618 alloy forgings, which provide exceptional strength and durability under demanding conditions. They incorporate proven cam and barrel skirt profiles to optimize engine performance and reliability. Equipped with tool steel wrist pins and moly skirt coatings on select part numbers, these pistons are engineered for superior wear resistance and thermal stability. They are ideal for professional engine builders and tuners seeking a combination of strength, precision, and longevity in their performance builds.
This piston set is specifically designed for 2004+ Subaru WRX and STI models with an EH257 engine, featuring a 100.0mm bore and +0.50mm size with an 8.5:1 dish compression ratio. It serves as a direct replacement or upgrade for stock pistons, suitable for high-performance applications such as street, track, or racing builds. Installation involves standard piston replacement procedures, and the kit includes the pistons and wrist pins. These pistons are intended for use in engines requiring enhanced durability and performance, making them an excellent choice for enthusiasts and professional tuners aiming for reliable, high-power results.
