Wiseco Subaru EJ257 WRX/STI 4V Dish -19cc 99.55 Piston Shelf Stock Kit

Wiseco is well-known for making strong, reliable engine components, especially for performance applications. This Professional Series piston kit is built for Subaru EJ257 engines, commonly found in WRX and STI models, and is designed for serious racers and builders tackling heavy to severe duty race builds. These pistons are engineered and forged in the USA from 2618 aluminum, which offers improved tensile strength for demanding conditions.

You'll find precision ring grooves, an anti-detonation groove, and other features that improve ring seal, helping to keep combustion contained where it belongs. The fully machined crown is a notable detail, and the pistons also feature forced pin oiling to ensure the wrist pins stay well-lubricated under stress. A key feature is the ArmorGlide skirt coating, which helps resist seizure, reduces friction, and contributes to quieter operation, all important for a high-performance engine that needs to hold together.

This kit includes four pistons, each with a 99.55 mm bore and a dish volume of -19cc, contributing to a specific compression ratio when paired with the right cylinder heads. It's important to note that these pistons are not CARB approved and cannot be shipped to California. If you're rebuilding your EJ257 for serious performance, these Wiseco pistons are a solid option designed to handle the heat and stress of racing.