Wiseco Mitsubishi 4G63 86.25 mm Bore 28.70 mm CH 1.90 CC Piston Set

Wiseco sport compact pistons are forged and machined in-house with power enhancing features like light weight forgings, millimeter ring packs, gas ports, skirt coatings, and offset pins. Optimized skirt profiles minimize rock and provide long skirt life in stroker applications. All machining uses the newest CNC equipment for tight tolerances. These top-of-the-line performance parts are made from 2618 Aerospace alloy for superior strength, with ArmorGlide skirt coating as a standard feature. They include high-quality NPR Steel nitrided rings with napier style 2nd rings. Features include valve pocket designs for maximum flow, piston crown shapes for maximum intake charge efficiency, and domes for optimal quench. Precision machined ring grooves ensure excellent surface finish, flatness, maximum ring seal, and minimized blow-by and oil consumption. A performance piston ring set is included.