Is it just the rears that click?
My car has an annoying click from the front passenger side since I fitted my sway bars (I think its an endlink problem though)
It will say something like "This car is fitted with a limited slip differential, do not brake test on rolling road" on the printout that they get at the start
I came from a turbo car. It takes a while to get used to the lack of boost but the power delivery is really smooth. I still miss a turbod car even after 18months in a Z