I also ahve the cusco lower arm bar, and that thing is a peice of ****. The hole that the bolt goes through for the two mounting brackets are purposely sloted, oblongated, and oversized. So any shear force resisted by the bolt will cause the bolt to move laterally since the tension/clamp force will never be able to resist the lateral movement of the bar. I think cusco does it this way to try to compensate for each car being slightly different and preventing customers from bitching about why the bar doens't fit. THe proper way to overcome this should have been to make a properly clearenced class 3 hole, then make the bar slight shorter, and take up the inconsistency of cars with shim plates.