Wiseco Mitsu Evo 4-9 4G63 Stroker Asymmetric Skirt Bore 86.00mm - Size +.040 - CR 9.5 Piston Set

Wiseco Sport Compact 86.00mm .040 over 9.5:1 CR Pistons are forged pistons for high-performance Mitsubishi Evo 4-9 4G63/4G64 engines (1996-2006). They feature valve pocket designs for oversized valves and high lift cams, and piston crown shapes for maximum intake charge efficiency and increased horsepower. Optimized for squish/quench, they enhance detonation resistance for longer engine life and increased power. Precision machined ring grooves and complex skirt profiles reduce friction. Made from 2618 high-strength alloy with ArmorGlide® Skirt Coating for seizure resistance, friction reduction, and quieter operation.