Wiseco Subaru EJ257 WRX/STI 4v Dish -19cc 100mm Piston Shelf Stock Kit

Wiseco is well-known for making strong, reliable internal engine components, especially for high-performance applications. This Professional Series piston set is built for Subaru EJ257 engines, commonly found in WRX and STI models, and is designed for serious racers and builders who push their engines hard. These aren't your average pistons; they're packed with features aimed at delivering both performance and durability when you need it most.

Each piston is forged and machined in the USA from 2618 aluminum, which gives them improved tensile strength over cast aluminum. They feature precision ring grooves, an anti-detonation groove, and other features designed to improve ring seal, which is crucial for maintaining compression and preventing blow-by under high stress. The fully machined crown and forced pin oiling are also notable details that contribute to their ability to handle heavy to severe duty performance builds. Plus, the ArmorGlide skirt coating helps reduce friction and noise while resisting seizure, keeping things running smoothly even under extreme conditions.

This kit includes four pistons, each with a 100.00 mm bore and a -19cc dish. They are designed as a shelf-stock replacement for the EJ257 engine, meaning they fit within the standard engine configuration. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. If you're building a high-output EJ257 and need pistons that can handle the pressure, this Wiseco set is a solid option.