It's an off-brand generic Flowmaster knock-off.
The Front Y-pipe and converters are factory, then they removed the rest of the stock exhaust and added pipe to the IMCO muffler mentioned above and then ran two custom bent tailpipes out the rear with a couple of stainless tips.

 

the vortex is squared looks just like what he has but it should have cherrybomb stamped on it.

http://www.cherrybomb.com/products/vortex

 

thanks for all the help so far, it seems like every person thinks it is something different? I am kind of confused as to witch part of the exhaust is stock and witch part is aftermarket? And so far it appears to be a cherry bomb vortex muffler, but it doesnt say cherrybomb on it, so maybe not?

 

It is stock back to the weld joint on the very left of picture #2. from there back has been custom fabbed.

 

That is the squarest damn muffler I ever did see! Can you post a video so we can hear it?

 

It should be stamped somewhere on the muffler. If its not on the underside (facing the ground) then I'd feel around on the top for any raised letters. I know flowmaster stamps their part number on the end of muffler. My new Delta 40's were stamped on the outlet side. Look it over very carefully, I'm sure you'll find something.

 

I doubt I'm right but do you guys think the muffler shop just made a square box to look like a muffler so you can say you still have a muffler? Just a thought but it is not a vortex the edges are rolled on the vortex i clicked the link and they are rolled these are a perfect 90 degree.

 

looks like a flowmaster. Put your hand on the other side of it and see if you feel a decal on it that could be words telling you what it is. Even better try and stick your head in there with a flash light

 

i wouldnt give 2 craps about the muffler when i got a diff that looks like that

 

+1 on Spin Tech, only seen one on my roommates Jeep, but it was the same squared off design. Probably not an exhaust "system" just the muffler with dual exit pipes and chrome tips. Factory stuff ends at the muffler.