I have a 98 Integra GS with usdm header and skunk2 test pipe and have two o2 extenders, should I use them both or just put one at the test pipe?

My check engine light comes on and I am pretty sure its cause of the o2 sensor on the test pipe.

 

ttt

 

If I am understanding you right...you are asking if you should use a cel eliminator on the o2 in the header and the test pipe or just the test pipe...

Just use one on the o2 going into the test pipe

 

...and dont forget to reset your ECU properly

 

Ok, I was thinking i only needed one on the test pipe.

 

Ok, the o2 extender doesnt fit due to clearance.

 

you can check your code using the link in my signature CEL Trouble Codes

your 98 is OBD2 if stock and requires two oxygen sensors

 

The o2 won't go back in either due to the threads being stripped.

I guess I am going to get a catalytic converter on there and two new o2 sensors.