Wiseco K573M88AP Forged 88 mm +8 cc Dome Pistons for Honda/Acura K-Series

Vehicle Fitment

• Honda / Acura K-Series (K20A, K20Z)
• K24 block with K20A/Z head swap
• Performance K-series builds including RSX, Civic Si, Integra, etc.

Features

• Forged from 2618 aerospace-grade aluminum for high strength and fatigue resistance
• +8 cc positive dome to significantly boost compression
• ArmorGlide® skirt coating to reduce friction and improve durability
• Strutted forging design for enhanced structural rigidity
• CNC-machined crown and ring grooves for precise sealing
• Floating 22 mm wrist pins for secure piston-to-rod connection
• Comes with a high-performance ring set (8800XX pattern)
• Optimized compression height to work with typical K-series deck setups

Specifications

• Bore: 88.00 mm
• Compression Height: 30.00 mm
• Dome Volume: +8.00 cc
• Wrist Pin Diameter: 22 mm
• Piston Material: Forged 2618 alloy
• Piston Weight: ~348 g each (nominal)
• Estimated Compression Ratio: ~12.06:1 (for K20 application) / ~13.8:1 (for K24 block) depending on head & gasket

Included Components

• 4x forged dome pistons (88 mm, +8 cc)
• 4x 22 mm floating wrist pins
• 4x circlips / locks for wrist pins
• 4x high-performance piston ring sets (8800XX pattern)

Product Description

The Wiseco K573M88AP is a race-ready, high-compression piston kit for Honda and Acura's K-series platforms. With an 88 mm bore and a +8 cc dome design, it's tailored for serious performance builds, especially when paired with high-flow heads and tight deck geometry.

These pistons are forged from 2618 aluminum, offering outstanding fatigue strength and thermal stability. The ArmorGlide® coating on the skirts reduces friction and enhances longevity, while the strutted forging structure reinforces the crown under high loads. Floating 22 mm wrist pins and a matched 8800XX-style ring set round out the package for dependable sealing and link reliability.

During installation, it's crucial to verify bore-to-wall clearance, ring end gaps, and deck height. Given the high dome, proper selection of head gasket and calculation of compression ratio is essential to maximize performance while maintaining reliability.