Here's a vid of the Remark Elite Spec catback I put on this past weekend. So far I really like it. It's got a low, somewhat scooped tone to it that is really satisfying and surprisingly isn't really all that loud from inside the car. There is some drone right at 3k rpm, but above or below that and it's actually quite mellow. Cold starts are fairly loud and percussive, but once the engine settles down the idle's not all that different from stock. Highway speeds are no problem and it's not intrusive at all. Anyway, the vid covers most everything sound-wise, so have a look.