Originally Posted by Vicr
If you have sway then you need added or larger sway bars. All Sumo's are are urethane bump stops.
If your getting pushed to the right when a tractor trailer passes, then sucked to the left as the rear of the trailer part of a tractor trailer passes you, you need a rear track bar as a sway bar won't take care of it. The rear end flexes on the road in such a case as above, therefore the track bar will stabilize the rear end. In regards to sumo's, you will notice a big difference with regards to ride an handling