Using these SPL FKS rear upper arm monoball bushings is straightforward. First, make sure your vehicle is safely supported and on a flat surface. Remove the old stock rubber bushings from the rear upper control arms. Then, carefully install the new monoball bushings in their place. You might need some basic tools for this, like wrenches. When it comes to maintenance, there's not much to worry about. The self - lubricating Teflon liner in the FK racing bearings means you don't have to add extra lubricants often. However, it's a good idea to check the bushings every few months for any signs of wear or damage. If you notice any issues, like excessive play or strange noises, it's time to have them inspected. Also, avoid driving through deep water or extremely muddy areas as much as possible, as this could potentially damage the bushings.