I have just learned that a good quality damper makes a huge difference in the handling of a rig. This one was just put recently and the improvement at any speed is dramatic. The stiffness can be adjusted by the knob at the end of the rod, in the twisties less friction can be set up easily, and vis vera for highway traveling. The brand of this unit is a WP suspension, it was especially made for sidecar use and saddely it is apparently not manufactured any more. A very gracious gentleman who was working for WP a long time ago, sold me 2 of these, and I will keep the spare one preciously in the trunk in case! The Stabilus damper on the picture will go away obviously.