Wiseco K669M87 Forged Piston Kit Mitsubishi 4G63 87mm Bore Sport Compact

The Wiseco K669M87 is a forged piston kit engineered for the Mitsubishi 4G63 turbocharged engine, featuring an 87mm bore diameter. Designed for the demands of high-output forced-induction builds, this kit delivers the strength and precision that serious performance builders require.

Key Features:

• 87mm Bore Diameter — precision-machined to tight tolerances for optimal ring seal and power retention
• Forged 2618 Aluminum Construction — engineered, forged, and machined in the USA for superior tensile strength and heat resistance compared to cast pistons
• ArmorGlide® Skirt Coating — provides seizure resistance, reduces friction, and enables quieter operation under high-boost conditions
• Gas Nitrided Top Ring — optimized for turbocharged and high-boost applications
• Napier Second Ring — delivers excellent oil control for extended engine life
• Forced Pin Oiling — ensures consistent lubrication to the wrist pin under severe-duty use
• Precision Ring Grooves — includes anti-detonation groove and additional ring seal features for maximum cylinder pressure retention
• Fully Machined Crown — with specially designed valve pockets for multi-valve 4G63 cylinder head compatibility

Each kit includes the forged piston(s), matching piston ring set, wrist pin(s), and circlips — everything needed for a complete top-end rebuild. Built for heavy to severe-duty race and performance applications, the K669M87 is a trusted choice for Mitsubishi Evo platform builds requiring reliable, high-horsepower performance.