For those who have lowered the car and noticed the rear toe could not be set to specs check you'r rear sub frame. The stud where the front radius rod from the spindle on the sub frame that stud could be welded to far foward.
On my car it was a 1/4 of an inch foward and even with adjustable toe arms the only way to have the alignment correct was to run -2.5 degrees of negative camber in the rear which is not correct.
Ordered a new peice under warranty and it to is welded to far foward by an 1/8th on an inch.
So if you have had an rear alignment problem I would check this stud to see it is welded to far foward. When compared to the other side it should be equal if not you need a rear sub frame.
Mike