Pro-HC – Forged piston developed with Vertex technology and high compressionAll pistons are heat-treated with a T-5 hardening and tempering cycleAll piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeForged High Compression pistons improve power and torque across entire rpm rangeDue to the higher compression, power and torque can be improved across entire rpm rangeTop end piston kits include piston, rings, wrist pin, circlips and top end gasketsReplacement two-stroke piston rings sold individually four stroke piston rings sold as a set