Originally Posted by NorCal DC4
It's entirely possible, but I honestly don't know for sure.
Gutted cats are ruinous to exhaust gas velocity; you might as well run a test pipe (but you didn't hear that from me).
The best thing to do is to get a PowerCore hi-flow cat.
I'm surprised the police haven't stopped you. I know I can smell the difference.
h:
I'm pretty lucky I guess. in the 6 plus years i've had a driver's license, and the 2.5 years I've had my car, i've only been pulled over once (2 years ago), and it was just a verbal warning for my headlights being too blue (hiper white headlights from back in the day). I'm actually about to put the stock cat back on in a few minutes anyway.
i've had the gutted cat for a few months now, but now its starting to bug me with the nasty smells and raspy exhaust note.