Get the Ultimate Differential Cover for your 1979-2011 Ford Mustangs 8.8" rear end with this solid Billet Rear Differential Cover from UPR Products. This cover starts off as a solid piece of Billet Aluminum and is machined to fit the 8.8 housing. Featuring fill and drain ports for easier maintenance, bearing support to eliminate main cap deflection and all tying together the 8.8" housing for the ultimate in strength. Perfect for Street and Race cars. Low profile design clears 05-11 Mustangs with and without panhard bars and the spare tire well on the 79-04 Mustangs.