Rock Krawler upper control arms offered for the 2023+ Ford F250 and F350 4x4 package are part of the Pro billet aluminum 4-link upgrade, serving to improve suspension geometry as part of the kit. These arms are specified with the upgrade package and intended to work with the matched components supplied in the system. They provide the structural link between chassis and axle required by the 4-link configuration.
Rock Krawler 2023+ Ford F250/F350 4x4 Package Pro Billet Aluminum 4 Link Upgrade