Here's a video on youtube that's not a Dinan. This is just the midpipe - no other mods. Has stock/Dinan vids, revs + drive bys. Nice up close video of pipe, too. Looks very well made, not that I expected anything less from Dinan.
You can definitely hear it's louder & much deeper than stock (6:40 has stock/dinan open/closed revs comparo.)