Wiseco Subaru EJ257 WRX/STI 4v Dish -19cc 99.5 Piston Shelf Stock Kit

If you're rebuilding the engine in your 2004-2012 Subaru Impreza WRX or STI, these Wiseco forged pistons are a solid choice for serious performance applications. They're built to handle the demands of heavy to severe duty builds, giving you the confidence to push your engine further. The -19cc dish design is specific to the EJ257 engine, helping to achieve the correct compression ratio for boosted applications.

Wiseco crafts these pistons from 2618 aluminum right here in the USA, which offers improved tensile strength for durability under high stress. You'll find precision ring grooves, anti-detonation grooves, and other features designed to improve ring seal and prevent detonation. The fully machined crown ensures accuracy, and forced pin oiling helps keep the wrist pins lubricated. Plus, the ArmorGlide skirt coating reduces friction and noise while resisting seizure, contributing to a quieter and more durable engine.

This kit includes a set of four pistons, each with a 99.50 mm bore and a 30.70 mm compression height, using a 0.9055 inch pin diameter. Keep in mind these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.