I have the Tanabe SRM and I can tell you that it is strait through and very very loud. My ITR sounds like an F1 car when Vtec is engaged, especially under bridges and in tunnels. :lol: :lol: I'm sure if a cop heard the Vtec for too long I would be getting pulled over, it's that loud. But off vtec it's very mellow and deep. I love my Tanabe SRM....