There are 2 different types of Cobra Calipers, The differance is in the piston size 38mm on the earlier ones and they are all PBR aluminium Calipers, They have Cobra cast on the outside. NO CAST IRON ON COBRA's They used a thirteen inch rotor. The differance between the Baer and Cobra rotors is that the Cobra Calipers are a little wider and have a wider bracket than the Baer Calipers. This is because the Cobra rotors are wider than the Baer rotors. I am in the process of Changing my Mustang to the Cobra calipers from the Baer Set up. Want to get away from the Baer Aluminium Hubs. Parts not available at your local Auto Parts. This is also the same set up as found on the Corvette. Because of rules I also have to have the 13" Cobra Rotors turned down to 12". This is all being done on a Fox Mustang with SN 94/95 Spindles. Back to the Contour you will have to make modifications to the Spindles and or Brackets to make this change. A lot of work and machining.