Sound clips/movie here!
I could not get the dB meter in the shot.
Readings at idle @ 3' on level with the pipe were in the 100-104dB range.
Readings at idle @ 3' at my chest level (about 4') were in the 94-98ish range.
Readings while reving midrange rpm were in the 100-115db range at a 6' level with the pipe.
Readings in the car while reving were peaking at about 110dB.
These dB reading were taken with my Radio Shack Anolog dB meter.