IMPORTANT NOTE: This kit is NOT compatible with Cobra/Bullitt/Mach1 models that have the stock 11.65" rear caliper/brake set up. If you own a Cobra/Bullitt or Mach1, do not buy this kit. It is only intended for GT/V6 customers who have upgraded their FRONT brakes to the 13" system(front cobra calipers)
If you really want the look then go for it. I personally think it looks better but wouldnt wanna pay that much extra for it. You could get just the calipers and then find rotors like you wants, prolly for less.