Wiseco K566M82AP Pro Tru Forged Piston Kit 82mm Bore Honda B-Series

The Wiseco K566M82AP is a high-performance forged piston and ring kit designed for Honda B-Series engines, featuring an 82mm bore diameter and +5cc dome design. This complete kit includes four pistons with rings, wrist pins, and circlips, engineered for both street and racing applications that demand maximum strength and reliability.

Key Specifications:

• Bore Size: 82.0mm (3.228 inches)
• Compression Height: 30.1mm (1.185 inches)
• Dome Volume: +5cc for optimized compression
• Piston Weight: 287 grams per piston
• Wrist Pin Diameter: 21mm (0.826 inches)
• Compression Ratio: 11.1:1 (varies by engine setup)
• Material: 2618 aerospace aluminum alloy forging

Advanced Features:

• ArmorGlide skirt coating reduces friction and frees up horsepower
• Strutted forging design for improved strength in high-stress applications
• Four-valve relief dome design with optimized valve pocket geometry
• Pre-gapped ring package with plasma moly coating (1.0mm/1.2mm/2.8mm)
• Precision machined ring grooves minimize blow-by and oil consumption
• Feature-aligned grain flow technology for maximum durability

• Complete piston ring sets
• Wrist pins (21mm diameter)
• Circlips (locks)

Wiseco pistons are manufactured in the USA at their Mentor, Ohio facility using advanced forging processes and extensive heat-treating procedures. The crown thickness and ring lands are specifically designed to handle power-adders including turbochargers, superchargers, and nitrous oxide systems. Each piston features a superior strength-to-weight ratio that exceeds cast piston performance while offering tighter tolerances than competitor offerings.

Note: This product is not CARB legal and not for sale in California. Piston-to-valve clearance must be verified during installation.