Wiseco Mitsubishi 4G63 85.50 mm Bore 34.87 mm CH -9.00 CC Piston Set

Forged from 2618 aluminum, these Wiseco pistons are built for the demands of serious racing and performance engine builds. The 85.50 mm bore size is a common upgrade for the Mitsubishi 4G63 engine, offering a slight increase in displacement over stock to potentially improve power output. This material choice is key for handling the higher cylinder pressures and temperatures found in performance applications, providing improved tensile strength where it's needed most.

Wiseco has packed these pistons with features to ensure durability and performance under severe duty conditions. You'll find precision ring grooves designed for better seal, an anti-detonation groove to help prevent detonation damage, and features that further improve ring seal. The crown is fully machined for accuracy, and the piston pin is designed for forced oiling to keep it properly lubricated. Additionally, the ArmorGlide skirt coating helps reduce friction and noise, while also resisting seizure, which is critical for longevity in high-stress engines.

This set includes four pistons, each with a compression height of 34.87 mm and a pin diameter of 0.8661 inches, designed to fit the 4G63 engine. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. If you're building a high-performance 4G63 engine for heavy or severe duty racing, these Wiseco pistons are a well-built option designed to handle the stress.