These are adjustable rear upper control arms, to be used on any vehicle lifted or not, up to 4" of lift. This kit comes with both upper arms and also includes 4 rubber bushings if you don't want to run the polyurethane bushings. The rubber bushings must be pressed into the arms if you want to use them. These adjustable arms will allow you to properly set your rear pinion angle due to adding a lift, while also adding strength over the stock arms. Suitable also for long travel rear suspension setups.