I notice more of an axle shift (wheel/tire on passenger side sticks out more) when I only had the 1" polyspacer, know with the 912's, it seems better center. I think so becuase at the original ride height, I think the bar is angled up, the 1 inch lift made it level, thus shifting it more, now with 912 its angled down the same amount it was angled up originally.......I think.......... I need to look into this more. The thing is, the drive shaft angle (up - down) doesnt seem that severe at all with the lift.