The rear Anti-Rock also comes with application-specific brackets and uses factory boltholes. We hit a snag, though. Those same boltholes were also occupied by Expedition One’s bumper brackets. The bumper brackets forced the sway bar brackets outboard and all but eliminated bar-to-arm spline engagement. We found a way to make the two parts play nicely with each other. The outboard sides of the Anti-Rock brackets were trimmed down until they were flush with the bracket plate. This trimming re-purchased precious spline engagement, giving the Anti-Rock sway bar arms a sufficient surface to grip.