These calipers are designed by one of the original Hurst/Airhart engineers from the SCCA Trans Am days. Latest patented design utilized. Includes 2 calipers, race pads, Stainless braid over teflon lines, brackets and bolts make this a true bolt on kit. Fits 1973-74 E, B body spindle, 1973-76 A body spindle and 11.75" x 1" Cordoba or Cop Car rotor and are not provided in this kit. Spindle and rotors must be provided by you. Most 64 and up MoPars can be converted to this spindle and it is preferred because of the lager spindle and bearing size for safety and durability. Road Race proven at tracks all over the country. If you want/need to depend on your brakes repeatedly in racing conditions then this kit is a must. Reart kits available upon request.