Disc Brake Upgrade: Converts Ford 9-inch rearends to modern disc braking performance, offering improved stopping power over stock drum brake setups at a comparable cost., Complete Kit Components: Includes bolt-on caliper brackets, 11.25-inch vented rotors, GM metric emergency brake-style calipers, brake pads, spacers, and all required hardware., Dual Bolt Pattern Rotors: Rotors feature a 2.780-inch center hole and are double drilled for both 5x4.5 (Ford/Mopar/AMC) and 5x4.75 (GM/Chevy) wheel bolt patterns., Rearend Compatibility: Fits Ford “big bearing” 9-inch housings (3.150" bearing O.D.) in both old and new flange styles, with axle flange offsets of 2-3/8" to 2-1/2"., Straightforward Installation: Bolt-on design works with most 15-inch disc brake–style wheels; includes instructions and.