Just a quick question, What after market exhaust set up are you guys running for the street?
Do you have 1,2,3, cats?
Have any of you failed you emission test? Or have you passed with flying colours with one cat?

 

i have 1 cat and it probably doesnt pass smog
i heard that all 3 cats are needed to pass the test

 

i have 0 cats

 

If you buy a complete turboback exhaust system that has a high-flow cat, you will almost certainly pass the sniffer test provided your ECU knows how to fire your injectors if they aren't sock. If you have a catless system, you will almost certainly fail. If you remove some stock cats but not others, you fall into the ambiguous area where you won't know until you try. The bad part in that case though, is that you can't truly make gains from exhaust until it's all been changed out for larger piping with a better flange, smoother bends, less restrictive muffler... it all matters.