Gutting HFC's
 

I'm getting a set of Kinetix hfc's for pretty cheap. I want them to help me get some volume out of my Fujitsubo exhaust.

Living in Cali I need to pass smog. Is it possible to gut the Kinetix? I want to keep the appearance of the stock cats. Then for smog I'll put the stock ones back in.

Have you tried running them non-gutted? Seems like such a waste instead of just getting some resonated test pipes, which look like they have a cat in them if you're going for visual.

Honestly,sounds pretty stupid.
First,have yoou heard in person the HFC's you mentioned with the Nismo
(its same as the Fujit)?I have Nismo S-tune.When I installed HFC's ,it
is LOUDER.Don't know what you mean by more "volume",but it will
be turned up.Furthermore,HFC'S tend to get a bit louder as they age.
I sure would wait to hear the results before I gut anything.

I'm running Kinetix cats with Invidia Gemini and it's just about perfect (for me, anyway). I don't like to be overly loud, but I definitely don't like quiet. Definitely should try them out before gutting.

It sure seems like a lot of work to put in high flow cats or test pipes and then have to switch them out for emission testing. Thinking I would just keep the catalytic converters and not worry about switching. Besides you are not polluting the air as much when you are running your cats.

No I havent heard them with my exhaust yet. Im hoping to put them in very soon. What I mean by volume maybe isnt volume...Im looking for a little more of a "growl". The Fujitsubo is a very quiet exhaust. Im not looking for obnoxious,just some thing a little meaner.