Manley Subaru 2.5L EJ257 WRX STi Piston Set - 100.00mm Bore 1.209in CH, -10.00 CC

If you're rebuilding the engine in your Subaru WRX or STi with the 2.5L EJ257 engine, especially for high-performance applications, a strong set of pistons is crucial. These Manley Performance pistons are built to handle the demands of a performance-tuned engine, offering a solid foundation for power and reliability. They feature a 100.00mm bore size, a 1.209-inch compression height, and a -10.00cc dish volume, designed to work with specific cylinder head configurations.

Manley uses domestic 2618 alloy forgings for these pistons, which are known for their superior strength and ability to withstand high temperatures and pressures common in performance engines. The pistons also feature proven cam and barrel skirt profiles, which help generate power efficiently while minimizing wear on the cylinder walls. To ensure a precise fit and optimal performance, Manley employs unique fixturing that allows for skirt turning and ring groove machining in a single operation, guaranteeing excellent squareness between the ring grooves and the piston skirt. This attention to detail in machining the ring lands and grooves is vital for achieving enhanced ring seal, which directly translates to more power and better engine efficiency.

Included with this set are premium chrome moly wrist pins, known for their durability. For those pushing the limits, Manley offers upgrades to even stronger wrist pin alloys on select part numbers. When building a performance engine, using well-made components like these Manley pistons is key to achieving your goals. Please note that these pistons are not CARB approved and cannot be shipped to California.