Manley 04+ Subaru WRX/STI EH257 100.0mm Bore +.50mm Size 8.5:1 Dish Piston Set

Manley Performance is well-known for building robust engine components that stand up to serious use. If you're rebuilding the engine in your 04+ Subaru WRX or STI and need pistons that can handle the demands of performance tuning, this set is a solid choice. These pistons are designed to work with the EH257 engine platform and feature a 100.0mm bore size, which is +.50mm over the standard size, and a dish volume that results in an 8.5:1 compression ratio.

These aren't just any pistons; they're forged from domestic 2618 alloy, a material chosen for its exceptional strength and ability to perform under high stress. Manley uses proven cam and barrel skirt profiles, which 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 crucial for achieving a good seal and maximizing power output. To ensure ultimate squareness between the ring grooves and the skirt, Manley employs unique fixturing that allows both operations to be done in a single setup. This set includes premium chrome moly wrist pins for added durability.

When you're building an engine that needs to perform, using well-built components like these Manley pistons is key. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.