I would like to put a bung for the Bosch O2 sensor (AEM wideband, et al) in my driver-side test pipe before installing them and I don't know what size it should be.

I would also like to put a bung in the driver-side manifold for EGT if someone knows the standard size of those as well.

I will be adding the gauges at a later date and just want to cap the holes for now.

Thanks,
-D

 

Yeah I am pretty sure the standard is 1/8th.

Peas!

 

M18X1.5 boss
This is your standard O2 sensor bung. Any muffler shop will have this. Same bung for wideband or regular O2 sensors.

 

Thanks for your help guys. Car goes in Tues...

-D