Wiseco K656M85AP Forged Pistons for 1993-01 Mitsubishi 4G63 7-Bolt

Vehicle Fitment

• 1993-2001 Mitsubishi Eclipse / Talon / Laser (4G63, 7-Bolt)
• 1996-2006 Mitsubishi Lancer Evolution IV-IX (4G63, 7-Bolt)

Features

• Forged from 2618 aluminum for superior strength and durability
• ArmorGlide® coated skirts to reduce friction and piston slap
• Dished crown (-4.5 cc) for moderate compression (~9.63:1)
• Strutted forging structure enhances rigidity under high load
• Forced-pin oiling ensures reliable lubrication at wrist pins
• Precision ring grooves with anti-detonation design
• Armor-plated (AP) ring lands for increased durability
• Includes high-performance steel ring set

Specifications

• Bore: 85.00 mm
• Stroke: 88.00 mm
• Compression Height: 35.00 mm
• Dome / Dish Volume: -4.5 cc
• Compression Ratio: ~9.63:1
• Wrist Pin Diameter: 22 mm
• Piston Weight: ~360 g
• Ring Set: Steel included

Included Components

• 4x Forged pistons
• 4x Wrist pins (22 mm)
• 4x Retaining clips
• 1x Steel ring set

Product Description

The Wiseco K656M85AP piston kit is engineered for Mitsubishi 4G63 7-bolt engines found in DSM platforms and early Evo models. Constructed from high-strength 2618 aluminum, these forged pistons provide excellent durability for high-performance and race applications. The ArmorGlide® coating reduces friction and helps maintain smooth operation.

Featuring a -4.5 cc dished crown, these pistons provide moderate compression suitable for naturally aspirated, turbocharged, or E85 fuel setups. Strutted forging increases piston rigidity, while forced-pin oiling ensures optimal lubrication at the wrist pins, even under high RPM.

The armor-plated (AP) ring lands increase wear resistance in high-power builds. This kit includes pistons, pins, clips, and a steel ring set, offering a complete solution for performance or rebuild projects on 4G63 engines.