Ymmv, but I got cars inspected with “not legal” high flow cat’s without issue. Hell, my ‘19 Ram 1500 had upgraded cats the size of coke cans, it was a commercial vehicle, and they didnt blink
You being from Cali though is a different story :/
Where is the chip or switch for it to physically remove it?
Parents range rovers had a physical plug in the trunk for example. You just remove a panel and pop it out, no more ASS