Wiseco Subaru WRX 4v R/Dome 8.4:1 CR 92mm Piston Shelf Stock Kit

If you're rebuilding the engine in your 1998-2011 Subaru Impreza for serious performance, a strong set of pistons is crucial. This Wiseco Professional Series piston kit is built from the ground up for demanding race applications where durability and strength are paramount. These aren't your average pistons; they're designed to handle the kind of stress that comes with heavy to severe duty use, giving you the confidence to push your engine further.

Wiseco crafts these pistons from 2618 aluminum, a material chosen for its improved tensile strength, which is essential for high-performance engines. They feature precision ring grooves, an anti-detonation groove, and other features designed to improve ring seal, helping to keep combustion gases contained and power up. The fully machined crown ensures consistent performance, and the forced pin oiling helps keep the wrist pins lubricated under extreme conditions. Plus, the ArmorGlide skirt coating reduces friction and wear, leading to quieter operation and better seizure resistance.

This kit includes four pistons, each with a 92mm bore and a compression ratio of 8.4:1, making them suitable for many performance engine builds. Remember, 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 details.