1964 1965 1966 Mustang 6 Cylinder, Power Brake Booster Kit With 5 Lug Rotors: Complete Front/Booster Kit. Comes complete with 11" Rotors, loaded calipers, mounting brackets and all necessary hardware. Includes Power Brake Booster Combo. This is a TRUE bolt-on kit for 6 cylinder Mustangs featuring the popular 5 on 4-1/2" bolt pattern. Without the need to change upper and lower a-arms, all the hassle is a thing of the past. This is a true bolt on kit for 14" and larger wheels. Complete kits includes all the hardware necessary for the conversion. Includes power brake booster combo. Specify MT or AT when ordering.