u/Impressive_Course682

Hey guys I just got my ecu back from 2wdw and I have a couple questions let me start of by saying I have a graves slip on, block off plates and gutted oem headers. Ik it says to unplug 02 sensor for aftermarket exhaust. Would I still need to do that for my case in which I kept the oem and just took out the catalytic converter. Also how long do I have to wait for my check engine light to go away?