Manley 04+ Subaru WRX/STI EH257 99.50mm Bore STD Size 8.5:1 Dish Piston Set

If you're rebuilding the engine in your 2004 and later Subaru WRX or STI, especially if you're aiming for more power or need to replace worn components, a solid set of pistons is crucial. These Manley Performance pistons are built for the demanding EH257 engine, featuring a 99.50mm bore and a standard size to fit your build precisely. With a dish volume that results in an 8.5:1 compression ratio, they're a well-built option for many performance applications.

Manley uses domestic 2618 alloy forgings for these pistons, which are known for their strength and ability to handle high performance demands. They also come with premium chrome moly wrist pins, and Manley's signature cam and barrel skirt profiles are designed to generate power while being gentle on your cylinder walls. The ring lands and grooves are machined to strict standards, which helps ensure a better seal for more power. Manley's unique manufacturing process allows them to machine the skirt and ring grooves in one operation, ensuring they are perfectly square to each other for optimal performance.

Keep in mind that these pistons are not CARB approved and cannot be shipped to California. If you're building a high-performance engine, these pistons are a popular choice among professional engine builders and tuners looking for durability and performance.