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

This Manley Performance piston set includes four forged pistons, designed for the Subaru 2.5L EJ257 engine. These pistons feature a 99.50mm bore, a 1.209-inch compression height, and a -22.00 CC dish volume. They are built using Manley's signature 2618 alloy forgings, a material known for its exceptional strength and performance under demanding conditions. Each set also comes standard with premium chrome moly wrist pins, contributing to overall 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, which is crucial for engine longevity. The ring lands and grooves are machined to exacting standards, ensuring a better ring seal and ultimately leading to more power output. Manley's unique fixturing process allows for skirt turning and ring groove machining in a single operation, which guarantees ultimate squareness between the ring groove and the skirt. This attention to detail is why professional engine builders and tuners often turn to Manley pistons.

Keep in mind that these pistons are not CARB approved and cannot be shipped to California. For optimal results and engine longevity, it's always recommended to consult the manufacturer's installation instructions or a professional mechanic for proper fitment and assembly procedures.