This Whiteline adjustable sway bar allows its rate to be altered by increasing or reducing the length of the lever arms. This permits the roll stiffness to be tuned for different situations without replacing the entire bar. The stiffer the bar, the more force required to move the left and right wheels relative to each other. This increases the amount of force required to make the body roll.The item "Whiteline Rear Sway Bar 24mm Adjust. Fits Subaru Impreza WRX STI 03-07" is in sale since Monday, October 23, 2017. This item is in the category "Vehicle Parts & Accessories\Car Parts\Suspension & Steering\Anti-Roll/Sway Bars". The seller is "partboxplus" and is located in Tipton. This item can be shipped worldwide.