It is very guite at idle and low throttle. When you start it up and if you go heavy on the go pedal you know its there. At cruising speeds my bfg m/ts are louder than the exhaust. If i had to compare it to a more common brand i would say the borla is close but i think mine is just a little mellower.

[IMG]local://upfiles/28431/FA49C9229AEE4A089DA5B5A6CC0E160A.jpg[/IMG]