Is your Fox body Mustangs serpentine belt slipping or squealing? Then you may be in need of a Ford Motorcraft Replacement Belt Tensioner to provide the correct tension to fix the problem. Made to the original factory specifications, this Replacement Mustang Belt Tensioner features a cast-aluminum spring case and arm to resist cracking and fatigue. The sealed-for-life bearing provides long reliable maintenance-free operation. This Ford Motorcraft Belt Tensioner is a direct fit replacement for 1986 to 1993 5.0L V8 equipped Mustangs, including the 5.0 LX, GT, and SVT Cobra models.