i'm assuming you have no cats at all, but if you actually have cats that are gutted, there's no way for an inspector to know without disassembling the exhaust, which won't happen (you'd be surprised how many people think they'll get caught having a gutted cat). but like i said, i'm assuming that you have no cats at all, in that case you're pretty much screwed, as i'm sure you know.

unless you can convince the inspector your car was made prior to 1973.