Manley Subaru 2.5L EJ257 WRX STi Piston Set - 99.75mm Bore 1.130in CH, -26.00 CC

Manley Performance is well-known for building strong engine components, and their Subaru 2.5L EJ257 piston set is a prime example of that commitment. If you're rebuilding the heart of your WRX or STi, these pistons are built to handle the demands of a performance engine. They feature a 99.75mm bore and are designed with a -26.00 CC dish, which is crucial for achieving the correct compression ratio with your specific cylinder heads and gasket combination.

These pistons are forged from domestic 2618 alloy, a material chosen for its exceptional strength and ability to withstand high temperatures and pressures without deforming. Manley uses proven cam and barrel skirt profiles that help generate power efficiently while also being considerate of your cylinder walls during operation. The ring lands and grooves are machined to exacting standards, which is key for ensuring a solid seal with your piston rings, leading to better power output and reduced blow-by. Each set includes premium chrome moly wrist pins, known for their durability, and Manley's unique fixturing process ensures the ring grooves are perfectly square to the piston skirt for optimal ring performance.

When you're building a high-performance engine, the details matter. These pistons are a solid choice for serious engine builders and tuners looking for reliable components. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. For a complete build, you'll want to ensure you have the correct piston rings, connecting rods, and bearings to match, as these are sold separately.