Sound is deeper and a little louder--most noticeable when cold starting the car. It is pretty mellow overall which is what I wanted. The sound is not loud enough to cause problems with the neighbors.
On the highway, there is some drone when cruising and giving slight throttle to maintain speed at 2k rpm. When I'm playing my tunes, I don't notice the exhaust sound very much at all. Basically, if you are looking for loud, aggressive sound, this is probably not for you. If you want deeper, slightly louder sound, then this is perfect. I like the sound and love the large, black tips. Looks a lot better than stock.
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