Ford Racing 1979-2004 Mustang 8.8inch Axle installation Kit - M-4050-B Ford Racing rear upper axle bushing kits include bushings, C-locks, and friction modifier. These kits are the same kits included with every Ford Racing 8.8 axle assembly and are necessary for installation.This Part... MSRP: $50.00 Was: Now: $41.79