Piston Kit - Standard - Kawasaki KX 450 FCaracteristicas: Moose Racing pistons feature X style forgings and fully boxed style (race pistons) forgings for ultimate strength, minimizing friction, durability, power, and weight reduction The Pro Race Piston increases the durability by reducing the stresses in the pin bore area The Pro Race Piston allows the pin to flex while removing stress from the area Full radius dome designs maximize quench while eliminating hot spots that promote detonation