Wiseco K675M865 Forged Piston Kit Mitsubishi Bore CR - 4G63 7-Bolt 86.5mm 9.5 1

The Wiseco K675M865 is a Professional Series forged piston kit engineered for the Mitsubishi 4G63 7-bolt engine platform. Featuring an 86.5mm (+0.060" oversize) bore and a 9.5:1 compression ratio with a -4cc flat-top dish, this kit is purpose-built for turbocharged DSM and Evo applications running a standard 88mm stroke crankshaft with 156mm long connecting rods.

Designed for heavy to severe duty race builds, Wiseco's Professional Series pistons are forged and machined in-house in Mentor, Ohio from 2618 aluminum alloy — chosen for its superior tensile strength and resilience under high heat and boost pressure. Each piston features Wiseco's proprietary ArmorGlide® skirt coating for reduced friction, quieter operation, and improved scuff resistance during break-in.

Key Specifications:

• Bore: 86.5mm (3.405 in.) — +0.060" oversize
• Compression Ratio: 9.5:1
• Dish Volume: -4cc flat-top
• Stroke: 88mm (3.465 in.)
• Rod Length: 156mm (6.142 in.)
• Compression Height: 28.70mm (1.130 in.)
• Pin Diameter: 22mm (0.866 in.)

Key Features:

• ArmorGlide® skirt coating — seizure-resistant, friction-reducing, quieter operation
• 2618 aluminum forging — improved tensile strength for boosted and high-RPM use
• Valve pocket designs allow use of oversized valves and high-lift camshafts
• Optimized skirt profile minimizes piston rock, extending service life in stroker applications
• Includes rings, wrist pins, and locks
• Machined on CNC equipment to tight tolerances

The K675M865 is also compatible with 100mm stroker crankshaft applications using a stock 150mm connecting rod. This kit is ideal for serious engine builders looking to maximize displacement and durability in the iconic 4G63 platform.