Wiseco Mitsubishi 4G63 85.25 mm Bore 28.70 mm CH -4.00 CC Piston Set

Forged from 2618 aluminum, these Wiseco pistons are built for the demands of serious racing and high-performance engine builds. The 85.25 mm bore size is a common upgrade for Mitsubishi 4G63 engines, offering a slight increase over stock displacement for improved power potential. The -4.00 CC dish in the piston crown is designed to work with specific cylinder head combustion chamber volumes to achieve a desired compression ratio, crucial for tuning naturally aspirated or forced induction setups.

Wiseco engineers these pistons with features aimed at durability and performance under severe conditions. Precision ring grooves ensure a solid seal, while anti-detonation grooves help prevent pre-ignition. The ArmorGlide skirt coating is applied to reduce friction, resist seizure, and contribute to quieter operation, all important factors when pushing an engine to its limits. Forced pin oiling is also incorporated to ensure adequate lubrication to the wrist pin under high loads.

This set includes four pistons, each machined with a fully finished crown. They are designed for heavy to severe duty applications, meaning they are built to handle the stresses of competitive racing and extreme performance tuning. Remember that these pistons are not CARB approved and cannot be shipped to California. Always consult your engine builder or a professional mechanic for proper installation and compatibility with your specific build.