Hi all received a decat down pipe with 2 sensors. My car 1995 wrx only has one which i think is cat on fire, my question is the other sensor is it a lamba sensor its right at the top of the pipe and if so can i use it to wire in a air/fuel gauge without messing with the original sensor
Thanks Neil

 

My O2/lambda is in the drivers side header/exhaust manifold.

Yes the sensor in the downpipe is the EGT (cat on fire).

My AFR gauge is spiced in at the ECU, not at the sensor. Pin outs available at JGM's site. Pic below shows the wire.



To add, the EGT is not required after decat for obvious reasons. It can be removed with no ill effects. Trace it back into the engine bay and disconnect at the plug.

 

That would be better no need to go into the engine bay, Guess i will leave the o2 sensor in or i will have to block the hole. Egt yes wrong plug on the end so will not use it. Just got to wrap the pipe first.
Thanks again Neil

 

I take it your o2 sensor is in the downpipe then, so you have 2 sensors in the downpipe? Unlike mine.
Yeah you blank the unused holes off with either a blanking plug or an old sensor.