Wiseco K573M865AP Performance Piston Kit Bore - 86.5mm

The Wiseco K573M865AP is a Professional Series forged racing piston set designed for Honda K20A engines, featuring an 86.50mm bore, 30.00mm compression height, and 0.866-inch pin diameter. This complete kit delivers an 11.7:1 compression ratio optimized for K20 cylinder heads and engine blocks.

Professional Series Features:

• Engineered, forged, and machined in the USA from 2618 aluminum for improved tensile strength
• ArmorGlide® Skirt Coating provides seizure resistance, friction reduction, and quieter operation
• Specially designed valve pockets, complex dome and crown shapes with steel nitride/napier rings and optimized skirt profiles
• Textured top face improves combustion characteristics

Professional Series forged racing pistons from Wiseco are no-expense-spared pistons designed for serious racers and builders, packed full of custom-level performance and durability features for heavy to severe duty race builds. ArmorGlide coating technology minimizes friction, maximizes horsepower, and provides improved wear resistance while allowing tighter bore fitment for better ring seal and reduced piston rock noise.