The Manley Performance Platinum Series piston for the 2004+ Subaru WRX STI with the EJ257 engine is a high-performance single piston designed for durability and reliable power delivery. Constructed from 2618 alloy forgings, these pistons feature proven cam and barrel skirt profiles to optimize engine efficiency. Equipped with tool steel wrist pins and moly skirt coatings on select part numbers, they are engineered to withstand the rigors of high-stress applications. This piston offers superior performance benefits, including enhanced strength, reduced wear, and improved thermal stability, making it suitable for both street and track use.
Designed specifically for 2004 and newer Subaru WRX STI models with the EJ257 engine, this piston is a direct replacement for stock components. It fits standard bore sizes of 99.50mm with a 79mm stroke, ensuring compatibility with OEM specifications. Ideal for professional engine builders, tuners, and enthusiasts seeking reliable upgrades, this piston is suitable for high-performance builds, tuning projects, and demanding driving conditions. The kit includes a single piston with rings, ready for installation in compatible EJ257 engines.
