Rocky Road Jeep Grand Cherokee control arms serve the purpose of helping to achieve proper alignment specifications and strut position when a Jeep Grand Cherokee is lifted. The main reason for the upgrade is that the stock arms can wear out.
The stock Jeep control arms have fixed Tie Rod Ends on them. Rocky Road Control arms are a great alternative. They also provide a little extra clearance for fitting larger tires and keeping the tires off the suspension as well as the control arm from contacting the frame.