[TougeSR20Kid]

I know that obd2 in northern Cali is a dyno with a sniffer as opposed to just a sniffer at idle, it really all depends on how strict they are in your county in Cali an sr will never pass a visual but I've heard of people in places with no visual only sniffer passing an sr with a cat and a de-tune, in other words stock with a cat, hell for shits and giggles I threw my old coupe on the tester we had at work and it passed just fine with a cat running stock... Your first step should be finding out what emissions tests in your county consist of, visual or no, dyno or no... But I agree with that one post up above just put a cat on and see if you pass, you never know, the emissions tech may not see that it doesnt visually check out or he or she may not even care, you won't know until you try.