#20638, "RE: Will a UDP change the note of my exhaust?" In response to Reply # 0
I don't think so. Based on my careful guesses, I don't think anything electrical will have any effect on ur exhaust. I got the UDP and I have a Greddy EVO. Well, it seemed to rev faster, so I guess u'll be hearing more of ur exhaust. But note wise, I don't think there will be any change.