It amazes me that the NAZIs in Cali require everything to be exactly as factory made the systems.
I lived in Massachusetts where they used to do similar smog on vehicles.
I had a 78 Toyota Celica with a 1963 3.5 liter Buick aluminum V8 in it. Yes, you heard it right.
Anyway, it used to pass since the only regulation was to pass the "sniffer" test.
It didn't have a cat on it either.
You can have a vehicle with all of the pollution controls on it, if one component is crappy, it won't pass the sniffer.
AND - a vehicle with no pollution control can pass the sniffer test. FTW...

Ok, sorry for the rant.