The piston is heat-treated with a T-5 hardening and tempering cycleThe piston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break in time and increased piston lifeCast piston is gravity-cast aluminum alloy (not forged) with 18% silicone contentPiston kit includes piston, rings, wrist pin and circlipsFor use with Hot Rods Stroker crankshaft.