Wiseco Mitsu Evo 4-9 4G63 Stroker Asymmetric Skirt Bore 85.00mm - Size STD - CR 9.5 Piston Set

Wiseco is well-known for making strong, reliable forged pistons for high-performance applications. This Professional Series piston set is built for serious racers and builders working on Mitsubishi Evo 4-9 models with the 4G63 engine. These aren't your average pistons; they're designed to handle the extreme demands of heavy to severe duty race builds, removing limits for your project.

Each piston is forged and machined in the USA from 2618 aluminum, chosen for its improved tensile strength under high stress. You'll find precision ring grooves, anti-detonation grooves, and other features designed to improve ring seal. They also come with an ArmorGlide skirt coating, which helps reduce friction and resist seizure, leading to quieter operation. The fully machined crown and forced pin oiling further contribute to their durability and performance in demanding situations.

This set includes four pistons, each with an 85.00mm bore and a 9.5:1 compression ratio, making them suitable for stroker 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.