Wiseco K597M86 Forged 86.00 mm Dish Pistons for Mitsubishi 4G63 (9.1:1)

Vehicle Fitment

• Mitsubishi 4G63 2.0 L - 7-bolt DOHC (DSM / Eclipse / Talon, early Evo)

Features

• Forged from high-strength 2618 aluminum for durability under boost
• ArmorGlide® skirt coating to reduce friction and resist scuffing
• -10 cc "dish" piston design for lower static compression ratio
• Strutted forging for enhanced rigidity and strength
• Anti-detonation groove to help mitigate knock
• Floating 22 mm wrist pins for reliable high-RPM use
• Comes with a high-performance ring set (8600XX) pre-gapped
• Specifically designed for turbocharged or performance 4G63 builds

Specifications

• Bore: 86.00 mm
• Compression Height: 35.00 mm
• Piston Dish Volume: -10.00 cc
• Compression Ratio: ~9.1:1
• Wrist Pin Diameter: 22 mm
• Piston Material: Forged 2618 Aluminum
• Approx. Piston Weight: ~350 g
• Recommended Ring Set: 8600XX
• Stroke (engine): ~88 mm
• Rod Length: ~150 mm

Included Components

• 4x Forged Pistons
• 4x 22 mm Wrist Pins
• 1x Ring Set (8600XX, pre-gapped)
• 4x Piston Locks / Circlips

Product Description

The **Wiseco K597M86** is a performance piston set designed for the Mitsubishi 4G63 engine - notably used in DSMs, early Lancer Evolutions, and other high-performance applications. The 86 mm bore and -10 cc dish achieve a relatively low static compression ratio of ~9.1:1, making these pistons well-suited to turbocharged builds or high-boost setups.

Constructed from 2618 forged aluminum, these pistons provide excellent strength at high RPMs while keeping weight in check. The ArmorGlide®-coated skirts help boost durability and reduce friction under aggressive conditions, and the strutted forging adds structural integrity to handle high loads. Forced-pin lubrication ensures the 22 mm floating wrist pins are reliably fed with oil.

This kit comes with a pre-gapped 8600XX ring set, simplifying installation while ensuring good sealing. Whether you're building a race-focused 4G63 block or a high-performance street turbo, these Wiseco pistons offer a durable, high-quality foundation for reliable power delivery.