I'm thinking 2, just making sure.

Going to be running a fjo wb which needs a o2 connection correct?

 

bump for the bung

 

these bungs go on the pipe before the cat?

If so I say 2, so you do not have to run a narrow band signal to your ecu from the wb controller.

 

ok, if you are running an obd1 ecu (or any other standalone).

You only need 1 o2 sensor, and i wouldnt put it on the cat. I would put it on your downpipe.

if you are running obd2 then you will need two o2's if you dont wanna throw a code, put one in the downpipe, and one at the end of the cat.

hope that helps.

 

going to be running a p28 ecu with hondata s200b.

so 2 bungs it is.