Its not too loud, especially if the back window is shut. If its open (how i have it usually) you can hear it. Its only when you start gettin up 75-85mph (not that ive ever been there /forums/images/graemlins/ignore.gif) that it starts getting too loud. Now if you are next to me or behind me you are on your own. Friend of mine going down interstate one day was behind me said ITS SOOO LOUD! then he got next to me and i layed into it he said it was really loud. Sittin at a stop light he also said the concussions from the exhaust were shakin his car. I like it, cops havent said a word about it. If it gets too loud, crank up the radio.