Wiseco K674M87 Mitsubishi 4G63 7-Bolt Forged Piston Kit 87mm Bore -12cc Dish 8.5:1

The Wiseco K674M87 is a forged piston kit engineered for the Mitsubishi 4G63 2.0L 7-bolt engine using a 156mm long connecting rod. Designed for turbocharged DSM and performance builds, this kit delivers a -12cc dish crown and 8.5:1 compression ratio, making it an excellent choice for boosted applications where lower compression helps support higher boost pressures safely.

Key Specifications:

• Bore: 87mm (3.425 in.)
• Stroke: 88mm (3.465 in.)
• Rod Length: 156mm (6.142 in.)
• Compression Height: 28.7mm (1.130 in.)
• Crown Volume: -12.0cc Dish
• Compression Ratio: 8.5:1
• Wrist Pin Diameter: 22mm

Key Features:

• 2618 Aerospace Aluminum Alloy — forged and machined in the USA for superior strength-to-weight ratio and high-temperature performance
• ArmorGlide® Skirt Coating — reduces friction, resists scuffing during break-in, and promotes quieter operation
• Armor Plating on Crown and Pin Bore — raises surface hardness, extends ring groove durability, and combats corrosion from detonation
• Gas Nitrided Top Ring — optimized for turbocharged and high-boost applications
• Napier 2nd Ring — provides excellent oil control
• Offset wrist pin design — matches OEM configuration for quiet, stable operation
• Precision-machined ring grooves — maximize ring seal and minimize blow-by
• Valve pocket design — supports oversized valves and high-lift camshafts

Each K674M87 kit includes four forged pistons, matching piston rings, wrist pins, and retaining clips — everything needed for a complete bottom-end assembly. Built for serious turbocharged 4G63 builds running high boost on pump gas or E85, these Wiseco pistons are a trusted choice among DSM and Mitsubishi performance engine builders.