SuperPro SPF0823K Rear Trailing Arm Bushing KitSuperPro SPF0823K Rear Trailing Arm Bushing Kit Control arm bushings form the vital pivot and link between all core suspension components. Worn bushings allow significant deflection and movement leading to slower responses, a sloppy drive, irregular and excessive tire wear and diminish every facet of the way your vehicle drives. The wear is accelerated and the impact of worn bushings is even greater in vehicles with larger and or grippier tire