Wiseco Subaru EJ257 WRX/STI 4v Dish -19cc 99.5 Piston Shelf Stock Kit

If you're building a high-performance Subaru EJ257 engine for serious racing or heavy-duty use, these Wiseco Professional Series forged pistons are a solid choice. Designed specifically for the WRX and STI models with the EJ257 engine, these pistons feature a 99.50 mm bore and a dish volume of -19cc, which is crucial for setting up your compression ratio. Wiseco has packed these pistons with features aimed at durability and performance under extreme conditions.

Crafted from 2618 aluminum in the USA, these pistons are forged and machined for improved tensile strength, making them well-suited for the demands of racing. You'll find precision ring grooves, anti-detonation grooves, and other features designed to enhance ring seal and prevent detonation. The crown is fully machined for accuracy, and they include forced pin oiling to ensure the wrist pins stay well-lubricated. Additionally, the ArmorGlide skirt coating helps reduce friction and noise while resisting seizure, which is a notable benefit in high-stress applications.

This set includes four pistons, the wrist pins, and premium rings, making it a comprehensive solution for rebuilding or upgrading your EJ257 engine. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.