SuperPro 03-23 Toyota 4Runner (without KDSS) Front Sway Bar KitSuperPro Roll Control Rear Sway Bar Packages are the perfect addition to a 4WD. The resistance to the fitment of rear Sway Bars to 4WD vehicles is the flawed concept of the loss of articulation in the suspension. If the replacement Sway Bars and link package is designed correctly, replacement Sway Bars can be fitted with minimal or no loss of articulation. Upgrading to Roll Control Sway Bars will: Improve the stability by compensating for the change