RE: what is the diffrence between the bullett and cobra Front Brake Calipers
Same caliper. One has raised lettering that says COBRA, the other has a little silver running pony printed on it. It's all about a matter of taste. I have the front kit from the Bullitt if you are interested. I somehow ended up with both kits for Christmas and decided to put the Cobra ones on. Here's a picture.
Edit: And a picture of the Cobra brakes on the front with the factory Bullit wheels. I can say it looks AWESOME, mostly because there's so little clearance. I had more pictures but I can't find them now [:@]