when does the 2008 g35 coupe come out

2008, duh!

generally new models of cars come out in octoberish of the previous year. So fall 2007, the 2008 cars will be out

Sometime this Summer hopefully. It will debut at the 2007 New York Auto Show in April, and it is said that it will hit showroom floors by June.

when you see them in the street, then you would know they out.

In the fall of this year.