Well it has been a while since I posted. We decided not to go with the N52 and instead use an S54 motor.
One step forward, two steps back...
Now I have custom headers from Magnaflow, SPEC alum flywheel/clutch that will not fit the S54. Anyone interested in headers or Alum flywheel/clutch for a N52? Brand new...
Anyone have any experience putting an S54 in an E90 chassis?