This easy to install kit comes complete with all necessary hardware to change your rear axle to the updated style and performance of a gm 10 or 12 bolt, as well as a ford 9 inch. The kit comes with new axle saddles pre-cut for the angle of the trailing arms and panhard bar conversion. For rear wheel drive trucks with trailing arms and coil spring rear suspensions only. Kit requires welding. Note uses your stock U-bolts.