Wiseco Subaru EJ257 WRX/STI 4v Dish -24cc 99.75 Piston Shelf Stock Kit

Forged from 2618 aluminum, these Wiseco pistons are built for the demanding EJ257 engine found in Subaru WRX and STI models. The -24cc dish design and 99.75mm bore size are specific choices for performance builds where precise compression ratios are key. Wiseco machines these pistons in the USA, ensuring a high level of precision in every component.

You'll find features like precision ring grooves, anti-detonation grooves, and additional ring seal improvements designed to keep combustion contained and efficient, even under heavy loads. The pistons also come with an ArmorGlide skirt coating, which helps reduce friction, resist seizure, and operate more quietly. Forced pin oiling is incorporated to ensure the wrist pins stay well-lubricated during high-RPM operation. These are intended for serious racers and builders who need components that can withstand heavy to severe duty performance applications.

This kit includes a set of four pistons, ready for your engine build. Please note 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.