Manley Subaru 2.5L EJ257 WRX STi Piston Set - 99.50mm Bore 1.209in CH, -22.00 CC

This is a set of four Manley Performance forged pistons, designed for the Subaru 2.5L EJ257 engine found in WRX STi models. Each piston measures 99.50mm in bore diameter, has a compression height of 1.209 inches, and features a dish volume of -22.00cc. These pistons are built using Manley's signature 2618 alloy forgings, which are known for their superior strength and ability to handle high performance demands. They come standard with premium chrome moly wrist pins for added durability.

Manley has engineered these pistons with proven cam and barrel skirt profiles. This design helps generate substantial power while also being gentle on your cylinder walls, contributing to a longer engine life. The ring lands and grooves are machined to exacting standards, which is crucial for achieving an enhanced ring seal and maximizing power output. Manley's unique fixturing process allows for skirt turning and ring groove machining in a single operation, ensuring ultimate squareness between the ring groove and the skirt. This attention to detail is why professional engine builders and tuners often rely on Manley pistons.

This piston set is intended for high-performance builds and is not CARB approved, meaning it cannot be shipped to California. If you're rebuilding the engine in your Subaru WRX STi and need robust, well-built internal components, this Manley piston set is a solid option.