What if you have a high flow cat instead of the stock one. It should still pass, correct?

 

I've passed with dual Random Tech high flow cats on my Z28. It wasn't smooth though. They failed me on the visual (said they were too small to be real cats) and then I had to appeal to the State Police to make them pass me. With the Evo, rather than mess around again, I just reinstalled the stock TB exhaust.

 

bump

 

Yo Shahul if you are worried about emissons and neeed use of a stock exhaust temporarily let me know. Cause I am saving mine just for this I got the whole setup .

 

have the exhaust actually, all stock.... just wondering how aftermarket cams, turbos and engine managment affects passing emmisions.... thanks you very much for the offer Quickshift

-shahul