I have an 03 with a KB&goodies and a 12 point cage full bassani but during the cage install we noticed a significant leak from the rear diff just gasket but when I brought the car to dealer offer to fix the diff under warrenty and even though i don't have the tick they are doing the driver side head swap under warrenty. I'd writen that off after the KB install but if anybody in central TX has a reason to take their cobra in go see Lief Johnson Ford. They're allright.