I am currently dealing with what I have considered to be a loud exhaust problem. To quantify how loud my exhaust really is I downloaded a free app on my iPhone called "Decibel X". With my car idling (in my case a 3.5L B35 with cam with a 1,200rpm idle) I pointed the phones microphone at the exhaust at pipe level from 2 feet away. I averaged about 100DB! The app said it was a diesel truck!! I am curious as to how loud other member's exhaust are. So if you have time to fool around with this, down load the free app and post your results. Am I the only member driving a diesel truck disguised as a coupe?