Wiseco K626M8525AP Forged Piston Kit for 1993-2007 Mitsubishi 4G63 (Evo / DSM)

Vehicle Fitment

• 1993-2007 Mitsubishi 4G63 engine (Lancer Evolution IV-IX, DSM applications)

Features

• Forged 2618 aluminum for high strength and durability
• ArmorGlide® low-friction skirt coating to reduce wear
• Strutted-forge design for enhanced rigidity and stability
• Dished crown (-14.0 cc) for tuned compression ratio
• Precision ring grooves and anti-detonation design
• Forced pin-oiling for superior lubrication under load
• Tool-steel 22 mm wrist pins for durability
• Professional-grade piston ring set included

Specifications

• Bore: 85.25 mm
• Compression Height: 35.00 mm
• Piston Dish Volume: -14.00 cc
• Compression Ratio: ~8.5:1
• Wrist Pin Diameter: 22 mm
• Piston Material: Forged 2618 aluminum
• Piston Set Quantity: 4
• Average Piston Weight: ~345 g

Included Components

• 4x forged pistons
• 4x 22 mm wrist pins
• 1x high-performance ring set
• Circlips / wrist-pin retainers

Product Description

The Wiseco K626M8525AP is a professional-grade forged piston kit designed for Mitsubishi 4G63 engines, including Lancer Evolution IV-IX and DSM turbo applications. Constructed from durable 2618 aluminum, these pistons provide exceptional strength for high-RPM, high-boost, and tuned performance engines.

The -14 cc dished crown creates a lower compression ratio (~8.5:1), ideal for forced-induction setups. ArmorGlide® coating reduces friction while the strutted-forge design increases piston rigidity. Forced pin-oiling ensures reliable lubrication for the 22 mm wrist pins under extreme conditions.

This kit comes with a premium piston ring set and is suitable for track, drift, or high-power street builds. Proper installation, including ring gap verification, clearance checks, and torque specification adherence, is crucial to achieving maximum durability and performance.