Its just a different way of attaching the sway bar end links,and allows for "some" adjustability of the bars rate.This is a custom 1.25"dia bar made by sainer engineering in fla.I dont know if they are still around though.John Sainer was an engineer for addco he had the blueprints to make the a -body bar in any dia.Addco use to offer a "sport" bar for the a-body which was a 1.25" dia.This setup allows the bar to react instantly which helps the car respond quicker.
