This photo shows how the rear lower control arm connects to the bellypan. Shown are the massive rebuildable Super-Flex joints. Rubicon Express ran a whole season in the competitive Jeep Speed racing series with the same type of control arms-with zero failures. At the end of the season, they were as tight as the day they were installed. In contrast, other Jeep Speed teams who use factory rubber bushings typically have to replace them after every race.