Wiseco Subaru EJ257 WRX/STI 4v Dish -15cc 99.5 Piston Shelf Stock Kit

If you're building a serious performance engine for your Subaru EJ257 WRX or STI, these Wiseco forged pistons are a solid choice. They're designed from the ground up for heavy to severe duty race applications, meaning they can handle the kind of stress you'd put on a dedicated track car or a high-output street build. Wiseco makes these in the USA from 2618 aluminum, which gives them improved tensile strength over other materials, making them well-built for demanding conditions.

You'll find precision ring grooves, anti-detonation grooves, and other features aimed at improving ring seal and overall combustion efficiency. Plus, they come with an ArmorGlide skirt coating. This coating helps reduce friction, resist seizure, and even makes for quieter operation, which is a nice bonus when you're pushing an engine hard. The fully machined crown also adds to the overall quality and performance of these pistons.

This kit includes four pistons, each with a 99.50 mm bore and a -15cc dish volume. They use a 0.9055 inch pin diameter and have a 30.70 mm compression height. Keep in mind these are not CARB approved and cannot be shipped to California. They are designed for sport compact applications and are a key component for anyone looking to get the most out of their EJ257 engine.