Never seen one used, and they won't help on the highway. The only thing it will do is stop high speed steering wheel rotation when you hit a rock or other obstacle with one wheel. It's just a shock, soaking up momentum with hydraulic restrictions and valving. You'd do a lot better if you have the front end aligned with about 3* of caster to make the big tires track a little better, and replace the idler arm bushings, and tighten up the steering box.

Just sayin'...

Not responsible for advice not taken...