Here are some issues we ran into today while installing the JBA exhaust. Their 3" exhaust has a 2.5" opening. This is a terrible design. Yes I said terrible. I understand they would do that to mate up to the stock cats and mid pipes but since we are using their 3" catted mid pipes it simply creates a restriction.
We cut that step down pipe out and will be tig welding a new 3" piece on.
Other than that the headers fit nicely. More updates coming later on Josh's Camaro!