Originally Posted by jc5988
i guess from past thread, there are only one sensor after the main cat before the secondary, so even u cut the secondary, the DME wont know its gone.
smog check via obd port will not notice it too, however, visual probably wont pass.
Hmm, thats pretty awesome. I wonder if you can see the same gains on stock exhaust. Thanks for the reply.
Out of curiosity (yeah, I have to know cuz i'm lost) what is the visual test?
They've always only hooked up to my OBD port and checked that all the sensors are ready.