Energy Suspension hyper flex polyurethane control arm bushing is an important component in a suspension that replaces faulty O.E. rubber bushings. Polyurethane bushings are firmer than the OE rubber ones giving a boost in handling performance and increases suspension efficiency. A firmer bushing increases the longevity of the bushing but there is a slight increase in NVH (noise, vibration, and harshness). Despite this, most drivers prefer the boost in performance. Control arm bushings made of Energy's Hyper-Flex performance polyurethane preserves proper alignment under extreme situations on the street, track or off-road. It not only maximizes the vehicle's handling, cornering and overall control but also provides a smoother effective operation.