Is this a stock exhaust on an '08?

[s_c5519]

Thanks for the help with this one guys. I'll try calling a few of the larger Hummer dealers in AZ and ask them too. My other 08 is going into trade on Thursday and I wanted to exchange the two exhuasts out before that day. That's if the one pictured here is a stock one. If it is not I will just keep it as it does sound ok, to me anyway... I just didn't want the dealer getting a $900 cat-back system, especially with what I am getting up the ying yang for trade in