As a remanufactured Original Equipment part, this unit guarantees a perfect vehicle fit O.E. quality seals, and check valves are installed on every unit for like-new performance and reliability Exclusive rust-prohibitive finishing process extends unit life; All units are tested to ensure reliable performance Master cylinder output rods are pre-adjusted (when included) for quick and easy installation Our remanufacturing process is earth-friendly, as it reduces the energy and raw material needed to make a new part by 80%