It's pretty common knowledge in the Nissan SR20 group. You can also lay it on a level floor and see that the ends are not the same height off the ground. I had one given to me to test out and that’s when I actually saw it first hand. Before that I was a little skeptical of how bad it was. You can always shim it even with washers under the endlink bushings. It also binds around the bushings that attach to the frame. Very hard to move the bar when it is not attached to the control arms. I have a Progress bar on my car now (another loaner) and it moves freely when you disconnect the ends from the control arms.