Way Motor Works has the most affordable Brake upgrade you can do to your R50 R52 R53 MINI Cooper and Cooper S. These simple Brake Stiffening Bushings replace the rubber bushings on your stock brake calipers. Using these solid bushings will improve not only the brake performance and feel but also the pad wear as the caliper won't rock like they do with the stock rubber bushings. ON SALE for $69.95 this week. Brake Stiffening Bushings - Way Motor Works These bushings do NOT fit the Front R53 JCW brakes.