Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.75mm +.25mm Bore 9.8:1 Dish Piston Set with Rings

Built from domestic 2618 alloy forgings, these Manley pistons are a solid choice for anyone rebuilding or upgrading their 2004-2012 Subaru Impreza's EJ257 engine. The 2618 alloy is known for its strength, making these pistons well-suited for demanding builds where reliability is key. They feature a dish design with a 9.8:1 compression ratio, and the set includes rings and premium chrome moly tool steel wrist pins for added durability.

Manley pays close attention to the details that matter for engine performance. Their pistons have proven cam and barrel skirt profiles, which help generate power while also being gentle on your cylinder walls. The ring lands and grooves are machined to strict standards, which is crucial for getting a good seal and maximizing power output. This precision machining, combined with their unique fixturing that ensures the ring groove is square to the skirt, means you're getting a well-made component that's ready for serious use.

This set is designed for a 99.75mm bore with a +.25mm overbore, and it's intended for standard stroke applications. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. If you're looking to build a strong engine for your Impreza, these Manley pistons are a popular option among professional engine builders.