Found these directions for a E90:
https://s3-us-west-2.amazonaws.com/f...ons/22834R.pdf
According to the directions, you can remove the rear subframe bolts and loosen the front subframe bolts. I'd rather not disconnect my brake lines since I have an autocross event on Saturday and I may be doing this more than once since I'm going to try my 15mm bar first, and if I don't get enough rotation, will jump to a 20mm one.
Any hints or suggestions before I start?