Originally Posted by DJG24

This is 100% spot on. My car needed a .4 shim on the left to get to 3 degrees toe. It is in fact that the independent suspension mounts twist when you tighten them down to the chassis like mentioned above. My car was exactly like this. I bought the 1 piece mount as an option piece and my car came out with 3 degrees on each side without having to add extra washers to one side and the car was noticeably better and more consistent.