Originally Posted by forza370z

And I can't tell you how loud the exhaust is because some people think it's loud while others don't. But I can give a comparison with the stock exhaust. If say stock exhaust(non nismo) is at 5/10 then the fast intentions is at 8/10 and the HKS is at 6/10.

And the Fast Intentions is one of the deepest exhaust on 370z.