Whiteline's Subaru Impreza STI Front Sway Bar - 26mm Heavy Duty Blade Adjustable (2014-2018) sway bars are principally designed to reduce body roll or sway. By reducing body roll, lateral loads are spread more evenly across the tires thereby increasing cornering grip and improving outright performance. This Whiteline 26mm 2 Point adjustable sway bar provides your vehicle with more grip, better handling and superior performance. For the cost handling improvement you can make to your vehicle. In fact, benefits extend to improvements in handling, safety and tire wear without affecting ride quality or comfort.