SuperPro's Hybrid differential mount bushing kits offers all of the comfort and isolation found in the OEM rubber with the vastly improved performance, reduced movement and deflection, and structural benefits found in a high performance polyurethane bushing. Utilizing both SuperPro's bespoke polyurethane compositions and a unique synthetic elastomer structure we have been able to offer both all-day GT open road comfort and the reduced movement, minimized deflection and superior locating properties found in a more solid mount. Reduced wheel hop, improved traction, less noise and vibration, and a vastly superior lifespan are all features of the TRC4758 kit. Premium performance for your S550 Mustang with the quiet and isolation of OE rubber, combined with the superior performance of near-solid mounts.