These Arms are fitted with Uprated Ball joints and SuperPro Bushes to reduce Arm movement. SuperPro now has a complete alloy repair upgrade solution for the BMW E46's lower control arms. This SuperPro kit comes with LHS and RHS arms, including heavy duty M-Spec ball joints, brackets and bushes. The complete arm kit is fitted with SuperPro bushings to positively locate the rear of the arm and eliminate the unwanted flex that comes with the O.E rubber bushing.