Using this D2 Racing RS coilover kit is easy. First, make sure your vehicle is parked on a flat and stable surface. Then, carefully install the kit according to the included instructions. You can adjust the dampener and rebound in 36 different ways to suit your driving style and road conditions. Also, adjust the height and preload separately for the best performance. When it comes to maintenance, regularly check the mounts and threads. Since the threads are Teflon - coated, they're resistant to rust, but it's still a good idea to clean them occasionally. If you notice any issues with the dampening or if the kit needs servicing, it can be rebuilt and serviced in the US. Remember, this kit comes with pillowball upper or top mounts on most applications, so handle them with care during installation and use.