This Control Arm Bushing Kit from Rancho features a D2 bushing at the forged end. The firmer inner bearing material and a softer outer material dampens noise, vibration, and harshness (NVH). The D2 synthetic high articulation bushings self-center and are grease free with a PTFE liner impregnated into the internal bushing that serves as a lubricating agent for silent, maintenance free operation.