Wiseco K586M90AP Forged 90 mm -22 cc Pistons for Nissan KA24DE

Vehicle Fitment

• Nissan KA24DE 2.4 L 16-valve (240SX, 1991-1998)

Features

• Forged from 2618 aerospace-grade aluminum for high strength and fatigue resistance
• ArmorGlide® skirt coating to reduce friction and improve durability
• -22 cc dished crown to lower compression (~9.0:1)
• Strutted forging design for increased rigidity under load
• Fully machined crown with precise ring grooves and anti-detonation feature
• Forced-pin oiling for reliable lubrication even at high RPM
• Includes high-performance piston ring set (9000XX)
• Floating 21 mm wrist pins for stable piston-to-rod connection

Specifications

• Bore: 90.00 mm
• Compression Height: 33.94 mm
• Piston Dish Volume: -22.00 cc
• Estimated Compression Ratio: ~9.0:1
• Wrist Pin Diameter: 21 mm
• Piston Material: Forged 2618 aluminum
• Piston Weight: ~363 g each
• Ring Set: 9000XX

Included Components

• 4x forged dished pistons (90 mm, -22 cc)
• 4x 21 mm floating wrist pins
• 4x circlips / locks for the wrist pins
• 4x high-performance piston ring sets (9000XX)

Product Description

The Wiseco K586M90AP piston kit is a high-performance forged set designed for the Nissan KA24DE engine, commonly found in 240SX models. The 90 mm bore with a -22 cc dish provides a lower compression ratio (~9.0:1), making it ideal for performance builds that may need more knock resistance or are tuned for moderate power.

Built from 2618 aluminum, these pistons offer durability and strength under demanding conditions. Their ArmorGlide® coated skirts reduce friction and help with smoother operation, while the strutted forging design enhances structural integrity under high load. The forced-pin oiling system ensures reliable lubrication even at high RPM.

This kit comes with a matched 9000XX ring set and 21 mm floating wrist pins, providing a complete solution for a balanced and reliable performance build. Installation requires checking bore-to-wall clearance, ring gap, and deck height to ensure optimal performance and longevity.