Originally Posted by Dwight Frye

You want to know how much louder the 370Z is ? Strip the carpeting and mat out of the trunk of your G35 and fold down the rear seat. That's a good start.
I owned a 2004 G35 Coupe and it was about half as loud as the Z. As much as I love my 370, the tire & road noise is so obtrusive it just about ruins long freeway road trips. You can barely hear the stereo unless it's turned up to 13 or 14 and forget hearing the quieter passages of songs or having a conversation with a passenger without speaking LOUDLY. Spirited mountain drives, not so much of an issue...