Piston Kit W/Gaskets Vt2797Piston Kit with GasketsForged from high silicon aluminum alloy for maximum strength and dependability Twin Cam pistons have Armor Plating which improves ring seal, eliminates ring micro welding and improves the piston's ability to defend against detonation damage Kit includes pistons, retainer clips, chrome piston pins, top end gasket kit, and VM Rings package (1. 2 mm steel, positive twist, gas nitrided top ring, 1. 2 mm cast iron, taper under hook