Nick M -- I would imagine that the fit should be close on the 370 since the axle back exhausts are all supposed to be the same. BUT -- I have seen quite a few that do stick out an ugly amount on G37's before... my guess is if it fits the G nicely, it would fit the Z nicely.
Follow up with video and pics ... By the way, I still think it sounds awesome and the fit and finish is perfect. It is also for sale... my wife won on this decision....
youtube video --
https://www.youtube.com/watch?v=wNzs...ature=youtu.be