The PFC Brakes 2018.20 CarbonMetallic Brake Pads are engineered to fit the front and the rear axles for the 2017-2019 Ford F450 and F550, eliminating the need for multiple part numbers for the same vehicle. The brake pads feature an increased surface on the rear pad to maximize pad to rotor contact area, along with a patented ionic fusion bond between the friction material and backing plate. It also features multi-layer technology, has temperature resistant shims, and is 100 percent copper compliant.