Piston Kit Exc300 Std 23375BPiston Kit Cast Replica for 2 StrokePiston is heat treated with a T 5 hardening and tempering cycle Piston skirt is coated with a high tech Molybdenum Disulphite coating for faster break in time and increased piston life Gravity cast aluminum alloy (not forged) with 18% silicone content Cast OE replacement piston Kit includes piston, rings, wrist pin and circlips Kit Includes: Cast Replica Piston Ring Set Wrist Pin Circlips