I have a 5 Zigen on my car now and it's not my favorite exhaust that I've owned, but it's not that bad. It only gets loud when you really get on it. It has a nice deep tone for just normal driving and sounds good in the car...it does however sound a little raspy from behind, but that's the other guys problem since I'm in the lead huh? My next exhaust will be the Greddy EVO2.