Wiseco K676M865 Forged Piston Kit Mitsubishi 4G63 7-Bolt 86.5mm Bore 10.5:1 Dome

The Wiseco K676M865 is a forged performance piston kit engineered specifically for the Mitsubishi 4G63 2.0L 7-bolt engine (Generation 2 / 1993–2001) using a 156mm long rod with an 88mm stroke. Designed as a high-compression, dome-top piston set, this kit delivers the strength and precision demanded by serious DSM performance builds.

Key Specifications:

• Bore: 3.405 in. (86.5mm)
• Stroke: 3.465 in. (88mm)
• Rod Length: 6.142 in. (156mm)
• Compression Height: 1.130 in. (28.7mm)
• Dome Volume: 1.9cc
• Compression Ratio: 10.5:1
• Wrist Pin Diameter: 22mm

Kit Includes:

• 4 Forged dome pistons
• 4 Wrist pins
• 8 Wire locks
• 4 Sets of piston rings

Features & Benefits:

• Produced from dedicated in-house forgings for an optimized strength-to-weight ratio
• Textured top face promotes improved combustion characteristics
• Specially designed valve pockets for maximum flow, compatible with oversized valves and high-lift camshafts
• Complex dome and crown geometry maximizes intake charge efficiency and scavenging during valve overlap
• Optimized skirt profile reduces friction while maintaining bore stability for superior ring seal
• Steel nitride/Napier-style rings included for enhanced sealing performance
• Engineered, forged, and machined in the USA in Mentor, OH

Wiseco's Sport Compact piston line draws on decades of motorsport experience — from Formula 1 and NHRA Pro Stock to Moto GP and AMA Superbike — to bring race-proven engineering to your street or track build. The K676M865 is the ideal choice for high-compression naturally aspirated or boosted 4G63 applications requiring a reliable, precision-forged piston set.