I am purchasing a new GT only problem is that the previous owner has off road x-pipe so it will not pass inspection is there something I can buy to just add catalytic converters, instead of buying a new mid pipe

 

Yes, the pypes ones arent bad but i perfer the slp kind.

 

Are they easy to install?

 

You could do what I did. Go to a exhaust shop and have them weld in two hi flow cats.