Wiseco Pistons K650M865AP Professional Series Forged Piston Kit Bore Honda K-Series - 86.5mm K20

The Wiseco K650M865AP Professional Series Forged Piston Kit is engineered for high-performance Honda K20 and K24 engine builds, delivering race-proven durability and power. This complete set includes 4 forged pistons, wrist pins, pin locks, and premium piston rings designed for serious builders and racers.

Key Specifications:

• Bore: 86.50mm (3.405") - 0.020" oversize
• Compression Ratio: 12.3:1
• Compression Height: 30mm (1.181")
• Pin Diameter: 22mm (0.866")
• Dome Volume: +10.5cc
• Piston Weight: 326 grams each
• Ring Set: 8650XX included

Advanced Features:

• 2618 Aluminum Forging: Engineered, forged, and machined in the USA for improved tensile strength and durability
• ArmorGlide® Skirt Coating: Reduces friction, minimizes piston noise, and provides seizure resistance for increased horsepower
• Precision Valve Pockets: Specially designed valve relief cuts accommodate high-lift camshafts and oversized valves
• Professional Series Construction: No-expense-spared design for heavy to severe duty racing applications
• Optimized Crown Shape: Promotes efficient scavenging and cross-flow during valve overlap for maximum power

Wiseco pistons are manufactured from dedicated in-house forgings, ensuring lightweight construction with superior strength. The precision CNC-machined ring grooves deliver excellent ring seal while minimizing blow-by and oil consumption. Each piston features complex skirt profiles that reduce friction while maintaining optimal stability within the cylinder bore.

Kit Includes: 4 forged pistons, 4 wrist pins (S550), 4 pin locks, 4 premium piston ring sets (8650XX), and installation specifications sheet.

Note: Not legal for sale or use in California on pollution-controlled motor vehicles. Professional installation recommended.