Second oxygen sensor

sorry to start this thread. ive searched and have not found a definite answer to my question. i am soon going to be purchasing an exhaust system from the o2 back. i am thinking of going with an apexi n1 exhaust and downpipe with a generic 2.5" o2 sensor. im going with the apexi just to aviod headaches of making my own piping. anyway i was wondering what you guys did with the second o2 sensor closer to the cat. convertor. to my knowledge most aftermarket downpipes dont have a o2 bung in there. any suggestions besides wrapping the o2 in aluminum foil.

after you get your exhaust installed, take it to an exhaust shop and let them install it in the new pipe.

I do not run the second o2 its pointless, it does nothing for you.

I do not run the second o2 its pointless, it does nothing for you.

Did you just use the instructions on vfaq. it loses me half way through those instructions.

sorry to start this thread. ive searched and have not found a definite answer to my question. i am soon going to be purchasing an exhaust system from the o2 back. i am thinking of going with an apexi n1 exhaust and downpipe with a generic 2.5" o2 sensor. im going with the apexi just to aviod headaches of making my own piping. anyway i was wondering what you guys did with the second o2 sensor closer to the cat. convertor. to my knowledge most aftermarket downpipes dont have a o2 bung in there. any suggestions besides wrapping the o2 in aluminum foil.



My exhaust has a slot for the o2 sensor.

I don't know why it wouldn't be included.


I have a meaghan racing dp and a tsudo cat back.
I just had to buy a new o2 sensor because the old one was warped and wouldn't screw in the new exhaust, so I just spliced in the new one and screwed it right in the exhaust.