Already handled, changed out the aftermarket lugs and went back to OEM, wallah problem solved!
Having same problem it sounds like.
I recently installed spacers....sounds like its coming from under/in front of the center console....removed front spacers, and aftermarket lugs, the clicking is still there.
OP, has the ticking sound come back at all?
I purchased my M5 with ECS spacers and extended bolts already installed and did not have this ticking issue until recently. I've owned the car for 3 years now. I then came to the same conclusion that it may be the CSB, but having read your experience, I no longer think it is the problem.
Now having read Dkarabas experience, I may be in the same boat as he/she (because I have that kind of luck, LOL!). I do, however, need to replace both the flex disc and CSB anyway so, that will be done regardless.