*Update*
If there is still any interest in this project I have found an 08 G37 coupe mid-pipe and muffler earlier last week. I was able to nab both for $100. While it looks quite dirty in the pics, it is pretty much rust free. After examining the resonators on the 08 G37 coupe to my 10 370Z. They are indeed identical beginning part numbers. With the following numbers/letters regarding its vehicle fitment.
The only fitment issue with the G37c exhuast are that the tips stick out nearly 2" from the bumper on a Z. A simple fix is to cut the factory tips off and either reweld them shorter, reweld Z tips on or source and aftermarket tip. I went with a bolt on style tip that is the same diameter as the stock ones but, in the burn blue finish. Pics below of mock up. I will be installing it sometime today and will get before and after vids for comparison.
