Using these K - Tuned front control arms is simple. First, make sure your car is on a stable and level surface. Use proper tools to remove the old control arms. Then, carefully install the new ones, making sure all the bolts are tightened securely. When choosing between the hardened rubber bushings and spherical bushings, think about how you use your car. If it's mainly for daily street driving, go for the rubber bushings. For racing or high - performance use, the spherical bushings are a better option. As for maintenance, regularly check the bushings for any signs of wear and tear. Clean the control arms occasionally to prevent dirt and debris from building up. If you notice any unusual noises or handling issues, it might be time to inspect the control arms more closely.