Whiteline 93-98 Toyota Supra MK4 JZA80 Front 30mm Heavy Duty Adjustable SwaybarSway Bar Heavy Duty 3Way Blade Adjustable As the name suggests their objective is to reduce sway, or body roll, and stabilise a vehicle under lateral (cornering) forces. Formula 1 cars still use sway bars along side the shocks and springs as it is the ONLY suspension component principally designed to control body roll. Unfortunately, many aftermarket spring manufacturers still design their lowered springs too hard, trying to control body roll when its