The piston is heat treated with a T-5 hardening and tempering cycleThe piston skirt is coated with high-tech Molybdenum Disulphite for faster break in time and increased piston lifeThe cast piston is gravity-cast aluminum alloy (not forged) with 18% silicone contentCast OE replacement pistonTop end kit includes piston, rings, pins, circlips, top-end gaskets, and wrist pin bearingReplica piston kit