Wiseco K627M85AP Forged Piston Kit for Mitsubishi 4G63 (Evo / DSM)

Vehicle Fitment

• Mitsubishi 4G63 engine (Evo I-IX, DSM 7-bolt)

Features

• Forged 2618 aluminum construction for high strength
• ArmorPlating® skirt coating to reduce friction and wear
• Strutted-forge design for improved rigidity
• Dished crown (-21.0 cc) for lower compression tuning
• Precision ring grooves for reliable sealing
• Anti-detonation groove to resist knock
• Forced pin-oiling for consistent lubrication
• Includes performance piston ring set (8500XX)

Specifications

• Bore: 85.00 mm
• Compression Height: 28.70 mm
• Piston Dish Volume: -21.0 cc
• Compression Ratio: ~8.0-8.5:1
• Wrist Pin Diameter: 22 mm
• Piston Material: 2618 Forged Aluminum
• Piston Set Quantity: 4
• Approximate Piston Weight: ~292 g

Included Components

• 4x forged pistons
• 4x 22 mm wrist pins
• 1x high-performance ring set (8500XX)
• Circlips / wrist-pin retainers

Product Description

The Wiseco K627M85AP is a professional-level forged piston kit designed for the Mitsubishi 4G63 engine, commonly used in Lancer Evolution and DSM applications. Crafted from durable 2618 aluminum, these pistons are built to handle high performance, high-RPM, and tuned engine environments.

With a -21 cc dished crown, the kit is tailored for lower compression builds, making it ideal for boosted or race setups. The strutted-forge construction provides rigidity under load, while ArmorPlating® on the skirts reduces wear. Forced pin-oiling ensures reliable lubrication for the 22 mm wrist pins, even under high stress.

Included in the set is a proven 8500XX ring set to provide excellent sealing and durability. For best performance and longevity, proper installation - checking ring gaps, clearances, and using correct torque - is essential.