Wiseco K573M87AP Forged 87 mm +8 cc Dome Pistons for Honda/Acura K-Series

Vehicle Fitment

• Honda K-Series (K20A, K20Z)
• Honda K24 block with K20A/Z head
• Acura RSX-S / Civic Si (K20 variants)

Features

• Forged from 2618 aluminum for high strength and durability
• +8 cc dome design to increase compression for performance builds
• ArmorGlide® skirt coating reduces friction and improves wear resistance
• Strutted forging for enhanced rigidity under high stress
• Precision CNC-machined crown with optimized ring grooves
• Forced-pin oiling for reliable lubrication at high RPM
• Includes high-performance piston ring set
• 22 mm floating wrist pins for strong piston-to-rod connection

Specifications

• Bore: 87.00 mm
• Compression Height: 30.00 mm
• Dome Volume: +8.00 cc
• Wrist Pin Diameter: 22 mm
• Piston Material: Forged 2618 aluminum
• Piston Weight: ~330 g each
• Estimated Compression Ratio: ~13.5:1 (K24 block, K20 head)

Included Components

• 4x forged pistons (87 mm, +8 cc dome)
• 4x 22 mm floating wrist pins
• 4x circlips / locks
• 4x performance piston ring sets

Product Description

The Wiseco K573M87AP is a high-performance forged piston kit engineered for Honda and Acura K-Series engines. Featuring an 87 mm bore and +8 cc dome, it raises compression, ideal for naturally aspirated or performance-focused K20/K24 builds.

Forged from 2618 aluminum, these pistons provide exceptional strength and durability under high stress and RPM. The ArmorGlide® coated skirts reduce friction, while the strutted forging design enhances structural integrity. The kit includes a high-performance ring set and 22 mm floating wrist pins for reliable piston-to-rod connection.

Proper installation requires checking piston-to-wall clearance, ring gaps, and deck height. The +8 cc dome necessitates careful selection of head gasket and calculation of compression ratio, ensuring optimal performance for high-output builds.