Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.55mm +.05mm Bore 8.5:1 Dish Piston and Ring Set

Our signature "Platinum Series" pistons feature 2618 alloy forgings, proven cam and barrel skirt profiles, tool steel wrist pins, and moly skirt coatings on select part numbers. Join the ranks of professional engine builders and tuners who rely on Manley pistons for superior performance and durability. Whether its for a full rebuild or some standard maintenance, the proper engine components are needed to make sure your vehicle is running smooth. Pistons are another vital component to an engines performance. If you are looking to upgrade the horsepower or add more boost to your car, we recommend upgrading to a forged set of pistons that can handle the boost and horsepower. These are the Manley Performance Platinum Series Piston Set. These pistons have been machined from lightweight 2618 construction, and they are ideal for those of you looking for a strong piston to sustain a high-horsepower or a high-boost build. These pistons feature an offset wrist pin design that is utilized for quiet start-ups and a perfect ring groove to skirt squareness that is achieved through Manley's "one fixturing" manufacturing method that assures maximum horsepower. All pistons will come with moly coated skirts, as well as round wire locks, premium chrome moly wrist pins, and premium steel top ring sets, Napier-style second rings and higher tension oil rings from Total Seal.