Hi guys

I am about to do a catback install on my evo 7. I noticed my midpipe does not have an o2 sensor in it but the aftermarket pipe that I have been provided does. Should I plug this o2 sensor up with a bolt or something?

 

Just plug the bung on the new pipe, O2 bing plug bolt or weld it shut, or get a WBO2 to install in that spot and you can monitor AFRs to boot.

 

Filled it with a M18 x 1.5 plug.