Manley Subaru 2.5L EJ257 WRX STi Piston Set - 99.75mm Bore 1.209in CH, -22.00 CC

Manley Performance is well-known for building strong engine components, and this Subaru 2.5L EJ257 piston set is a prime example of their commitment to performance. If you're rebuilding the heart of your WRX or STi, these pistons are designed to handle the demands of a high-performance engine. They feature a 99.75mm bore, a 1.209-inch compression height, and a -22.00 CC dish volume, making them a solid choice for serious engine builds.

These pistons start with domestic 2618 alloy forgings, which are chosen for their exceptional strength and ability to withstand high temperatures and pressures. Manley also uses proven cam and barrel skirt profiles that help generate power while minimizing wear on your cylinder walls. The ring lands and grooves are machined to exacting standards, which is crucial for achieving a good seal and maximizing power output. For added durability, these pistons come with chrome moly wrist pins, and Manley's unique fixturing process ensures the ring grooves are perfectly square to the skirt, contributing to overall engine health and performance.

When you're putting together a performance engine, attention to detail matters. These Manley pistons are built with that in mind, from the material selection to the precise machining. Keep in mind that these are not CARB approved and cannot be shipped to California. For a complete build, you'll want to ensure you have the correct supporting components and follow the manufacturer's installation guidelines.