Ford Racing Diff cover, sell for about $199 on American Muscle. It was an extra when my Scott Drake cover was having leak issues on my 2013. I ordered another cover and Scott Drake sent me a brand new cover for the 2013 I installed it and that one didn't leak, so I had this one laying around, I also used a lube locker 8.* rear gasket and about 3 quarts of Royal Purple.