Hi Guys, For the life of me I cannot figure out what causing this weird effect. Hope someone here can shed some light on the matter. I recently upgrade to the Eibach Pro kits and had a full 4 wheel alignment done along with re-calibration of the adaptive suspension. The issue I am getting is when I hit a pothole, manhole cover or uneven surface, the cars rear end will wiggle almost like a side step at the rear. To make sure i want going mad, I had another person witness this to make sure it wasn't just me. At high speeds when you hit manholes covers on the road it is unnerving. I have taken it back into the guys who have aligned it and they say everything is spot on. Anyone know what might be causing it?