Wiseco K669M8525AP Professional Series Forged Piston Set Mitsubishi - 4G63T 85.25mm

The Wiseco K669M8525AP is a Professional Series forged piston set designed for Mitsubishi 4G63T engines, featuring an 85.25mm bore, 28.87mm compression height, and 0.866-inch pin diameter. This complete set includes four pistons with HD2 asymmetric skirt and gas porting technology, designed for Mitsubishi Evo 4-9 applications.

Professional Series Features:

• No-expense-spared design engineered for serious racers and builders, packed with custom-level performance and durability features
• Engineered, forged, and machined in the USA from 2618 aluminum for improved tensile strength
• ArmorGlide® Skirt Coating provides seizure resistance, friction reduction, and quieter operation
• Fully machined crown features with precision ring grooves
• Anti-detonation groove and enhanced ring seal features
• Premium rings included with each piston

Technical Specifications:

• Bore: 3.356 inches (85.25mm)
• Compression Height: 1.137 inches (28.875mm)
• Pin Diameter: 22mm (0.866 inches)
• Dish Volume: -10.25cc
• Compression Ratio: 10.5:1

These Professional Series pistons are designed and built for heavy to severe duty race builds, making them ideal for high-performance Mitsubishi Evolution applications where maximum reliability and power output are required. Each piston set includes premium piston rings, wrist pins, and circlips for a complete installation.