we got visuals here too.
i have had a gutted cat welded on my car before. after the guy got done welding it on he said i should have gutted it first. i told him i already gutted it, and he said wow i usually see that (but dont care).
another time i had my straight pipe cat welded up on my car, the dude looked through the cat, smirked, and welded it on - no questions asked both times.
its illegal to weld on a gutted/straight-piped cat, but i have never had a guy care (they usually smile). and once its welded up its a done deal - pass visuals with a

and enjoy your performance and sound improvment