Where and what size bung for wideband sensor?

[TrophyHead]

Is it a stock O2 sensor bung/weld a let? Should I weld on the long tube header or the h-pipe? Which side? Thanks alot guys.

 

[MrXCESSIVESPEED]

A regular O2 sensor bung is the proper size, you can buy them from most places...summit, jegs, etc.

I have mine in the drivers side header...I believe the LH side is usually leaner.