Wiseco K650M875AP Forged Pistons for 02-06 RSX-S/06-11 Civic Si K20A/Z

Vehicle Fitment

• 2002-2006 Honda RSX-S (K20A/Z 2.0L I4)
• 2006-2011 Honda Civic Si (K20A/Z 2.0L I4)

Features

• Premium 2618 forged aluminum for strength and thermal tolerance
• +1.50 mm oversize bore (87.50 mm) for refinished or bored blocks
• High-compression dome design (~10.5 cc) for performance builds
• ArmorGlide® skirt coating reduces friction and improves longevity
• Precision ring grooves for improved sealing and ring life
• Strutted forging enhances piston integrity under high loads
• Designed for high-RPM, high-output sport compact engines
• Complete piston ring set included for rebuild readiness

Specifications

• Bore diameter: 87.50 mm (+1.50 mm oversize)
• Compression height (CH): 30.00 mm
• Dome volume: ~10.5 cc
• Material: 2618 forged aluminum
• Wrist pin diameter: 22 mm (0.866 in)
• Quantity: 4 pistons
• Included piston rings: Yes
• Applicable engines: Honda K20A, K20Z 2.0L I4

Included Components

• 4x forged pistons (87.50 mm)
• 4x piston ring sets
• 4x wrist pins
• 4x circlips/locks

Product Description

The Wiseco K650M875AP forged piston kit is built for high-performance Honda K-Series engine rebuilds that require oversize pistons after the block has been machined. Crafted from durable 2618 forged aluminum, these pistons are designed to withstand the stresses of high RPM and elevated combustion pressures common in sport compact and racing applications. The +1.50 mm oversize bore (87.50 mm) accommodates blocks with a larger bore diameter, ensuring a precise fit and optimal sealing once installed.

Each piston features a high-compression dome profile (~10.5 cc) that supports increased compression ratios suitable for naturally aspirated and modified engines. The ArmorGlide® skirt coating helps reduce internal friction and wear, while structurally reinforced forging and precision machining deliver reliability and performance. This complete kit includes premium piston rings, wrist pins, and locks - everything needed for a professional quality rebuild for 2002-2006 Honda RSX-S and 2006-2011 Honda Civic Si K20A/Z engine applications.