True, but depending on the state this may not matter. In jersey if your car passes an obd2 scan, they don't do a tail pipe sniffer. So if your state is similar, one could *in theory* (and this is a hypothetical situation, purely for the sake of argument) just pop in an o2 spacer found on ebay and call it a day.
I was running an o2 spacer on the OBX, however since it's a 45 degree angled bung, you can't get a 90 degree spacer on it, and a straight spacer + sensor makes the overall width too large, and it hits the firewall... It's only a matter of time before the sensor wires break off... Luckily, until this point, the OBX actually didn't fit properly, allowing for the spacer + sensor to fit without rubbing... Except it was rubbing on the other side of the exhaust well.
I do not have to pass emissions.. It's not required where my car is registered... So I will never have to pass any inspection... The only reason I want a cat is to get those damn fumes from pouring into my car. Nobody will ride in my car since the fumes are unbearable.
This is why I'm making this thread, I want to know the best cost-effective solution... I'll get one of those metallic 100-cell cats if I won't throw a code (just can't stand having a CEL) and if the fumes will go away, or be way less extreme. If the 100-cell will throw a code indefinitely (especially within a short amount of time) I'll pass. I'll get a cheapy magnaflow.
Just looking for solid, backed-up answers... Thank you to those who have given some.
So with all this being said, I'll leave it up to a vote, what would be my best option?