Originally Posted by 280z/300zx

Being an ex California resident who had two older modified Z's there, which was a huge pain, the rule is that unless any mods you do has a CARB number it isn't legal. So for example, if you go to smog your car and lets say you did a simple CBE upgrade. The smog tech should ask for your CARB number for the exhaust before even doing the OBDII test. No number, no pass, no matter what the OBD II test shows. So going FI you better make sure that the kit comes with a CARB number. Any mod that you end up doing that does have a CARB number means that not only will you pass visual inspection but it also means that in turn you should also pass the OBD II or even a sniffer test.

That all being said, most smog techs will let simple mods go like intakes and exhaust, but I'm pretty sure that something like a FI kit they will require some documentation. Your best bet is to talk to local Z clubs, car clubs, or go to any local car shows and talk to people there about smog stations. Most car guys who have been doing it for a while will usually know the smog stations that are a bit more lenient with testing.

I'm just glad I'm out of that state. My 300zx runs cleaner than most new cars but because the CBE is custom (no CARB number) and my headers don't come with a CARB number (no one makes street legal headers for the Z31) my car wouldn't pass inspection. Here in Vegas she passes no problems. My 280z, forget it. So many mods on that car, no chance in hell. Plus I have to dial back the fuel before the test. Here in Vegas I just pull up, pop the hood, dial back the fuel, pass no problem, readjust fuel, and drive home. Smoging cars is just a shame to get money for the state anyway.