Wiseco K656M855AP Forged Dish 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 aerospace-grade aluminum for high strength
• ArmorGlide® skirt coating reduces friction and piston noise
• Dished crown (-4.5 cc) for moderate compression tuning
• Strutted forging structure for enhanced rigidity
• Forced-pin oiling ensures reliable lubrication of the wrist pin
• Precision-machined ring grooves with anti-detonation features
• Armor-plated (AP) ring lands for durability under high load
• Includes a high-performance steel ring set (8550XX)

Specifications

• Bore: 85.50 mm
• Stroke: 88.00 mm
• Compression Height: 35.00 mm
• Dome / Dish Volume: -4.5 cc
• Compression Ratio: ~9.74:1
• Wrist Pin Diameter: 22 mm
• Piston Weight: ~380 g
• Ring Set: 8550XX steel included

Included Components

• 4x Forged pistons
• 4x Wrist pins (22 mm)
• 4x Retaining clips
• 1x Ring set (8550XX)

Product Description

The Wiseco K656M855AP piston kit is designed for Mitsubishi 4G63 7-bolt engines, including DSMs and early Evo models. These forged pistons provide high strength and durability, while ArmorGlide® coating reduces friction and ensures smooth operation under demanding conditions.

The dished crown (-4.5 cc) maintains moderate compression, making this kit suitable for naturally aspirated, turbocharged, or E85 setups. Strutted forging enhances rigidity, and forced-pin oiling ensures reliable lubrication to the wrist pin under high RPM.

Armor-plated ring lands improve wear resistance in high-power applications. The included 8550XX steel ring set completes the kit, providing a complete solution for performance or race-oriented engine builds.