The CEG term for the electronics to fool the system into thinking the two manifold/pre-cats were working fine is MIL eliminator. Used in place of downstream O2 sensors. Any emissions inspection will check for presence of cats. Most people who want to eliminate their cats gut them (bash all the honeycomb catalyst out of 'em) but leave the shell there. i.e. Joe Inspector doesn't look inside the cat. I have seen that there are confirmed cases of Contiques passing Cali Smog Check with all three cats gutted. Hope this helps.
