Enjoy the TCK DA setup!
A couple of questions:
1. Are you using thrust washers or Torrington bearings on the F struts?
2. Are you using adjustable F sway bar end links? As the car is lowered the geometry of the sway bar is changed and it can reduce its effectiveness or cause it to bind. Also, the F sway bar mounting bushings are really tight on most e9x M3s so if the bar isn't re-aligned properly (eliminating preload also is important), you'll most likely end up with a "squealing-squeaking" sound as you turn the steering wheel. However, in your case, this might not be an issue because you're having a H&R F sway bar installed
