Minimize wheelhop and enhance the rear stability of your S550 or S650 Mustang by decreasing differential movement with a Polyurethane Differential Bushing Lockout Kit from BMR Suspension. The stock rubber bushing with large void are great for absorbing NVH, but do nothing for performance. The polyurethane inserts in BMR's Polyurethane Differential Bushing Lockout Kit simply reduce the bushing's deflection. This non-permanent modification keeps the factory bushing in place, giving you the lowest increase in NVH of all BMR differential mounting solutions. BMR Suspension's Polyurethane Differential Bushings Lockout Kit (BK051) drastically decreases differential movement and pinion rise over the factory rubber bushings. BMR designed its Differential Bushing Lockout Kit from 95-durometer polyurethane. This material is extremely strong, without significant weight gains. Each bushing lockout plate is molded to exact tolerances. This allows for a perfect fit and increased performance for any driving style. BMR Suspension BK051 Polyurethane Differential Bushing Lockout Kit is the perfect wheelhop solution for any S550 or S650 Mustang being used for performance driving. BMR's Differential Bushing Lockout Kit offers huge increases in performance over the stock rubber bushings. The OE bushings are designed with air pockets and are made from soft rubber. These voids, coupled with soft material produce excessive differential movement during normal and aggressive driving. BMR's Polyurethane Differential Bushing Lockout kit installs over the OE rubber bushing, reducing differential movement by filling the space between the bolt and bushing cup. This reducies wheelhop and increases handling stability, while giving you a much-improved overall feel in any performance driving situation. BMR Suspension's BK051 Polyurethane Differential Bushing lockout Kit is available in a durable black finish and comes with all necessary hardware.