The message at the beginning says it is un-modified, so it is either the standard exhaust or the optional NPP exhaust (probably set to "sport" or "track" mode). Sounds like NPP to me.
Getting that sound on your car - you'll have to listen to what others have and see what you think comes closest. There's a sticky thread with lots of examples:
http://www.camaro5.com/forums/showthread.php?t=21289