since i don't have PM available yet...
Kirk: Yes, according to the TMS site, this SS exhaust fits 2002 and up non-M Z4. And, yes, the mid-pipe is included along w/ the muffler.
Incompatible: nope. didn't do the rear. the stock is plenty beefy typically.
Dubbledown: sorry don't have the model # on the vorshlags but could probably find it. Along w/ the spring perch info. but can check w/ my buddies @ the shop who did the info.