I wish I could tell you. I bought the GT500 used with 412 miles on it and it was already lowered. I didn't notice it at first until a friend of mine who is a Ford dealer pointed it out. But looking now at stock GT500's I can really see the difference. I think Ford offers a lowering kit in the performance catalog. It must be done properly or the Rear Diff can rub against the gas tank and cause problems.