Late Model Resoration carries replacement and SFI approved performance Mustang harmonic balancers. We carry stock replacement harmonic balancers for 5.0L, 4.6L, 3.8L, 5.4L, 2.3L, and 4.0L Mustangs. SFI approved, and high performance Mustang harmonic balancers also available from Ford Racing, Professional Products, and ASP.