EFIDynoTuning Forum

I’m going to have the passenger side exhaust partially disassembled to replace a head gasket. Thought I might add a wideband bung to the pipe after the shorty header while it is accessible. I read somewhere on this site there is a specific guage that is recommended. I can’t find that info again.
What gauge is it, and am I ok only have one bung (pass side)? Any tips or suggestions welcome.
Cheers. Brad

Not sure what you mean by gauge but orientation is most important. You want it on the upper half of the pipe so if you envision the pipe was being half filled with water the o2 wouldnt get wet. Its either in the pre tune info or o2 write up.

I found it aem 30-4110
Pass side bung is sufficient?

yeah no prob

decipha wrote: ↑2025 Aug 30, 09:41You want it on the upper half of the pipe so if you envision the pipe was being half filled with water the o2 wouldnt get wet.

If I envision that, then I would think the O2 sensor needs to point up, which is incorrect. You want it pointing down a little, not horizontal, not up, but down no more than 10*.

There will be instructions with the AEM 30-4110 of where/how to mount the sensor.
If the sensor is laying horizontally, you want it ~10* pointing down.
The idea is, that if condensation gets on the sensor, the water will drip off the tip.

negative

the best location is the sensor on the top 12 o clock

ignore what the manufacturer suggests