Using these wheel spacers is easy. First, make sure your vehicle is parked on a flat and stable surface. Then, loosen the wheel nuts before jacking up the car to a safe height. Remove the wheels and place the spacers onto the axle hub, aligning them properly. Put the wheels back on and tighten the nuts. It should take around 30 minutes to finish the installation. As for maintenance, check the tightness of the wheel nuts regularly, especially after the first 50 - 100 miles of driving. Clean the spacers with a mild soap and water solution to keep them looking good. Avoid using abrasive cleaners that could damage the 6061 Aluminum body. If you notice any signs of wear or damage, replace the spacers immediately.