Disc Brake Kit contains parts needed to convert from front drum brakes when using new spindles. (Stock height or drop type available.) A new #37-8588 Brake Master and Booster Kit is needed, see below.Requires use of 17-inch or larger diameter wheels originally designed for use with disc brakes. Kit includes 12" brake rotors; calipers and semi-metallic pads; hoses and hardware; and bearings and seals.