Prothane Total Suspension Bushing Kit, 05-10 Cobalt / 06-11 HHRIf you want a way to improve your car's handling, these will dramatically stiffen the chassis and improve handling of your 05 10 Cobalt 06 11 HHR. These bushings will also last a lot longer than the factory bushings, as they are urethane and the factory ones are a soft rubber which will deteriorate over time. These bushing kits replace the following bushings on the chassis: 24MM Front control arm bushing set Rear Control arm bushing Front sway bar