It's stock z-28 from the cat back to the muffler but the muffler is flowmaster and the Z-28 tips exit out the center sounds great
Oh the flow is a 2 chamber and there are some other details that we can discuss about it over the phone... nothing major though!

but lets say 80 bucks obo?
I'm in the north fortworth area

EDIT: for an Lt-1 but if you want just the muffler we can work something out