Moog K6688 Control Arm Bushing Kit Bushings are manufactured from high quality elastomer compounds for durability and ride performance. Elastomer compounds do not utilize any reground rubber fillers. High level bonding adhesive is used for durability. Bushings are assembled with the proper precompression to provide the ultimatein performance and feel. The metal rib design helps lock the inner tube within the frame pocket. Metal surfaces are phosphate coated for corrosion protection.