Piston Kt Grz/Rp/Rhi 660 23104Piston Kit Cast Replica for 4 StrokeThe piston is heat treated with a T 5 hardening and tempering cycle The piston skirt is coated with a high tech Molybdenum Disulphite coating for faster break in time and increased piston life Cast piston is gravity cast aluminum alloy (not forged) with 18% silicone content OE replacement piston Kit includes piston, rings, wrist pin and circlips Kit Includes: Cast Replica Piston Ring Set Wrist Pin Circlips