97 Cobra calipers, what do I need?

you can swap the rotors, hoses, and calipers from the front of your car to his car.

If you wish to do the back brakes the cobra has 11.6" rotors and the gt has 11" rotors. The calipers are teh same but the backing plate will need to be changed too. I think if you keep the 11 rotors on the GT you can swap only the calipers.