This is a thread from
www.Ford-Trucks.com Oct 20 2014, So the confusion is greater,lol contradict what the previous video shows for Hotchkiss. In that i guess i'll just leave it alone :)
The diameter of a sway bar is the first thing that will get changed from the aftermarket. The thicker the bar, the more stiff it is just as it is with a torsion bar. Essentially, that is exactly what a sway bar is: a torsion bar for roll control. Now, where this can differentiate is if the bar is hollow or not. A 26 mm solid bar will most likely be stiffer than a 26 mm hollow bar, for example.
Another factor is the length of the arm of the sway bar. In race cars you see this in the splined arm at the ends of the sway bar. Your OEM sway bars and aftermarket bars built to fit in the OEM position also have “arms”, though they are made into the shape of the sway bar.