Wiseco K588M92AP Forged 92 mm -9 cc Pistons for Subaru EJ20

Vehicle Fitment

• Subaru EJ20 2.0 L 16-valve (WRX / Impreza, 2002-2005)

Features

• Forged from 2618 aerospace-grade aluminum for high strength and durability
• -9 cc dished crown to lower compression (~8.2-8.35:1), ideal for high-boost or race builds
• ArmorPlating® skirt coating reduces friction and improves wear resistance
• Strutted forging design for enhanced rigidity under high load
• Fully machined crown and ring grooves for optimal sealing
• Forced-pin oiling ensures consistent lubrication at high RPM
• Includes high-performance matched piston ring set
• 23 mm floating wrist pins for stable piston-to-rod connection

Specifications

• Bore: 92.00 mm
• Compression Height: 32.66 mm
• Piston Dish Volume: -9.00 cc
• Estimated Compression Ratio: ~8.2-8.35:1
• Wrist Pin Diameter: 23 mm
• Piston Material: Forged 2618 aluminum
• Piston Count: 4
• Included Ring Set: High-performance matched set

Included Components

• 4x forged dished pistons (92 mm, -9 cc)
• 4x 23 mm floating wrist pins
• 4x circlips / locks for wrist pins
• 4x high-performance piston ring sets

Product Description

The Wiseco K588M92AP piston kit is a high-performance forged solution for Subaru EJ20 engines, particularly WRX and Impreza models. The 92 mm bore with a -9 cc dish provides a lower compression ratio (~8.2-8.35:1), optimized for turbocharged or high-RPM applications.

Made from 2618 aluminum, these pistons offer superior strength and longevity. The ArmorPlating® coated skirts reduce friction and wear, while the strutted forging design adds extra rigidity. Forced-pin oiling ensures consistent lubrication under demanding conditions.

The kit includes matched high-performance piston rings and 23 mm floating wrist pins, providing a complete package for performance builds. Proper verification of bore-to-wall clearance, ring gaps, and deck height is recommended during installation to ensure optimal performance and reliability.