Wiseco K675M86 Mitsubishi 4G63 7-Bolt Forged Piston Kit 86mm Bore 9.5:1

The Wiseco K675M86 is a Professional Series forged piston kit designed for the Mitsubishi 4G63 7-bolt engine. Built for serious racers and high-output builds, this kit delivers a 86.00mm (3.386") bore with a -4cc flat-top dish and a 9.5:1 compression ratio — ideal for forced-induction applications running significant boost.

Key Specifications:

• Bore: 86.00mm (3.386")
• Stroke: 100mm (3.937") — 100mm stroker crank application
• Rod Length: 150mm (5.906")
• Compression Height: 28.70mm (1.130")
• Piston Dish: -4.0cc flat-top
• Compression Ratio: 9.5:1
• Wrist Pin Diameter: 22mm
• Set Includes: 4 forged pistons with rings, pins, and locks

Premium Features:

• 2618 High-Strength Aluminum Alloy — forged in-house for superior tensile strength and durability under extreme loads
• ArmorGlide® Skirt Coating — reduces friction, resists seizure, and quiets piston operation for more usable horsepower
• Gas-Nitrided Top Ring — optimized for turbocharged and high-boost applications
• Napier 2nd Ring — provides excellent oil control under high-performance conditions
• Precision Ring Grooves — fully machined crown features for consistent sealing and ring life
• Engineered and machined in the USA at Wiseco's Mentor, Ohio facility

The K675M86 is part of Wiseco's Professional Series — a no-compromise piston line purpose-built for heavy to severe-duty race engines. This kit is specifically configured for the Mitsubishi 4G63 7-bolt (Generation 2, 1993–2001) paired with a 100mm stroker crankshaft and 150mm connecting rods, making it a go-to choice for DSM and EVO platform engine builds.