I don't know if anyone has clarified this yet. The Q300 is NOT quieter than the factory exhaust. There is a nice deep tone to it. It basically reminds me of Borla exhausts from back in the day. There is a slight drone but not bad at all. I have a 2.5 year old son who sits in the back so I really had to watch out for the drone. I hope this helps anyone out debating on getting the Q300. It's reminiscent of the Greddy SP systems.
On another note. Does anyone have any experience using Torque Solutions exhaust hangers? Any feed back? Thank You.