Wiseco Subaru EJ257 WRX/STI 4v Dish -24cc 100 Piston Shelf Stock Kit

If you're rebuilding the engine in your Subaru EJ257 WRX or STI for serious performance, a strong set of pistons is where you start. This Wiseco shelf stock kit is built for those heavy-duty race applications where reliability under extreme stress is critical. These aren't your average pistons; they're forged from 2618 aluminum right here in the USA, giving them improved tensile strength over cast aluminum.

Wiseco machines these pistons with precision ring grooves, anti-detonation grooves, and other features designed to improve ring seal, which is crucial for maintaining compression and preventing blow-by under high boost. They also come with an ArmorGlide skirt coating. This coating helps reduce friction, resist seizure, and even makes operation quieter. The fully machined crown and forced pin oiling further contribute to their ability to handle severe duty performance builds.

This kit includes four pistons, each with a 100.00 mm bore and a -24cc dish. Remember that these pistons are not CARB approved and cannot be shipped to California. For a robust engine build aimed at competition, these Wiseco pistons offer a well-built foundation.