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, which enhance stability and reduce piston slap under high-stress conditions. The inclusion of tool steel wrist pins ensures reliable connection to the connecting rods, while moly skirt coatings on select part numbers provide reduced friction and improved wear resistance. These pistons are engineered to deliver superior performance, making them ideal for both street and track use, especially in high-performance engine builds.
Designed specifically for 2004+ Subaru WRX and STI models with a 99.50mm bore and an 8.5:1 compression ratio, this piston set serves as a direct replacement or upgrade for stock components. It is suitable for engines requiring standard bore size and is intended for professional engine builders, tuners, and enthusiasts seeking increased durability and performance. Installation involves replacing the original pistons with these forged units, ensuring compatibility with the stock or upgraded engine configurations. The kit includes the pistons and wrist pins, providing a comprehensive solution for enhancing engine strength and longevity in high-performance applications.
