Pretty much all of Stillen stuff and then Nismo Catbacks are 100% safe picks. I know a local dealer that orders and installs both, and I'd assume many do in the state.
CBE, once you clear sniffer and noise testing, still depends on the tester. Some will be uptight and actually look into CARB regulation, though from the sound of things, that's pretty rare. Like you must've picked the worst spot to get tested in that situation.
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