The law does allow you to R&R a cat after 10,000 miles.
I used to live in San Diego, CA. One can ignore vehicle inspections by registering your vehicle(s) in a smog-check exempt zone. Mine were registered from 1999-2005 in such a zone and I never had to inspect my vehicles. Of course, I didn't worry about the smog-police because my cars had the factory emissions equipment intact, including the cats.
:thumb:

