Manley Subaru WRX STi (EJ257) 99.5mm Bore STD Size 8.5 CR 83mm Stroke Piston w/Ring *SINGLE ONLY*

If you're rebuilding the engine in your 2004-2011 Subaru Impreza, especially for a performance build, a strong piston is key. This is a single forged piston from Manley, designed for the EJ257 engine. It features a 99.5mm bore and an 8.5:1 compression ratio, making it a solid choice for those looking to push their engine's limits.

Manley uses domestic 2618 alloy forgings for these pistons, which means they're built to handle significant stress and heat. They also come with chrome moly wrist pins and have carefully machined ring lands and grooves. This attention to detail helps ensure a good seal for the piston rings, which translates to more power and better engine performance. The skirt profiles are designed to be effective while also being gentle on the cylinder walls, which can help extend the life of your engine components.

Remember, this is a single piston, so you'll need to order the correct quantity for your engine build. It's also important to note that this part is not CARB approved and cannot be shipped to California.