i have a video i just dont know/havent put it on the computer.
however, here is a link to 4.6 exhaust soundclips.
On the left hand side, scroll down until you see SLP Loudmouth
http://www.mustangexhaust.com/4.6sounds.htm (register)
im trying to decide if i want to put a stock catback back on the car or not.... idk yet