i've had the exhaust over a year now, the interior resonance isn't buzzing and humming but it is present i however like to be able to hear my car inside so i like it also; i can turn the radio up and it really isn't too much of a factor.

the videos were recorded with the windows down, so resonance would be cut at least in half but just rolling up the windows...if you want the same basic tone but less resonance you could always go with a flowmaster delta series.