Using this APR aerodynamic kit is easy. First, make sure your car is clean and dry. Then, carefully install each part following the included instructions. The front air dam goes at the front of the car, the side rocker extensions attach to the sides, and the rear bumper skirts fit at the back. When installing, ensure all parts are properly aligned and tightened. As for maintenance, regularly wash the kit with mild soap and water to keep it looking good. Avoid using abrasive cleaners as they can damage the finish. Also, check the parts periodically for any signs of loose fittings or damage, especially after driving on rough roads or at high speeds. If you notice any issues, it's best to have them fixed right away to maintain the performance and appearance of your car.