The ORD 14-bolt disc brake conversion sheds more than 50 pounds of weight from the rear axle assembly and greatly improves brake performance over the OE drum arrangement. Discs are also better than drums because they are self-cleaning-no more worn-out drums from running in mud, sand or silt. The kit includes two caliper mounts, spacers and all the necessary hardware required to mount the system to the factory four-bolt backing plate flange on the axlehousing. We like the fact that this conversion costs less than rebuilding the factory drum brakes. This kit was designed to work with any single-wheel GM Corporate 14-bolt full-floating axle with the drum secured behind the wheel bearing hubs. This kit will not work if your drums slip off from the outside or with dual rear-wheel axles.