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

When you're rebuilding the heart of your 2004-2012 Subaru Impreza WRX or STI, especially for serious racing applications, you need pistons that can handle the stress. This kit from Wiseco includes four forged pistons, designed specifically for the EJ257 engine with a 100mm bore. They feature a dish shape that displaces -19cc, which is crucial for setting up your compression ratio correctly during an engine build.

These pistons are forged and machined in the USA from 2618 aluminum, a material chosen for its improved tensile strength, making them well-built for heavy to severe duty performance. Wiseco has included precision ring grooves, an anti-detonation groove, and other features to improve ring seal. They also come with an ArmorGlide skirt coating, which helps reduce friction, resist seizure, and operate more quietly. The fully machined crown and forced pin oiling are details that show these pistons are ready for demanding use.

This kit is intended for builders who are serious about performance and durability. It's important to note that these pistons are not CARB approved and cannot be shipped to California. You'll want to consult your engine builder or service manual for specific installation details and what other components are needed to complete your engine build.