Sounds a little like the video-that is, it's a deeper sound than before. I've done light towing-jet skis-and I don't notice it unless I'm thinking about it-which is never. I was worried about the loudness outside--neighbors and all--but no one has complained, and I don't think it's any louder than before--again, just that deeper sound. And, I was also worried about droning, etc inside the cab-but again, no worries.
One thing, if I had the $$ is go the 5"--THAT'S a nice sound. But have no idea what it's like inside.
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'06 2500 SLT Megacab 4x4, Timbrens, Icebox, Amsoil (oil & filter), Aero 4040xl, DiPricol Optix Gauges (Trans/Boost/Pyro), Bilstein 5100's
