Nissan 370Z Forum - View Single Post - Fast Intentions exhaust is here! (continued)

djkyky · 08-09-2012, 08:23 PM

I installed the cat back FI exhaust on my 2012 Z. There is a distinct annoying drone at 4000 rpm except when I have the windows rolled down. Why does having the windows down make a difference, internal pressure?

08-09-2012, 08:23 PM	#543 (permalink)
djkyky Base Member Join Date: Jan 2012 Location: Lexington, KY Posts: 17 Drives: 12 Nissan 370Z Rep Power: 13	Drone I installed the cat back FI exhaust on my 2012 Z. There is a distinct annoying drone at 4000 rpm except when I have the windows rolled down. Why does having the windows down make a difference, internal pressure?