Manley 04+ Subaru WRX/STi EH257 99.75mm +.25mm Bore 9.8:1 Dish Piston Set of 4 Turbo Tuff *Extreme

When you're rebuilding the engine in your 04+ Subaru WRX or STi, especially for boosted applications, a solid set of pistons is crucial. This set from Manley Performance includes four forged pistons, designed to handle the demands of a performance engine. They feature a 99.75mm bore and a 9.8:1 compression ratio, making them a strong choice for builds aiming for improved power and durability.

Manley uses their signature 2618 alloy forgings for these pistons, which are known for their strength and ability to perform under high stress. The pistons also come with tool steel wrist pins, a robust component that ensures reliable operation. You'll find that the cam and barrel skirt profiles are carefully shaped to help generate power while also being considerate of your cylinder walls during operation. Manley's manufacturing process ensures that the ring lands and grooves are machined to exacting standards, which helps achieve a better seal with your piston rings, ultimately leading to more efficient power delivery.

This set is part of Manley's Turbo Tuff *Extreme line, indicating they are built for serious performance. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. For optimal installation, always refer to the manufacturer's detailed instructions and consult with a professional engine builder if you have any questions about your specific build.