So i have my Zeitronix wideband laying around and want to hook it up this week. My question is which o2 sensor should i connect it to? I don't have an extra welded on my dp so i'm thinking of grabbing the testpipe from A-Spec that comes w/another o2 sensor plug for my wideband. Was planning on redoing my whole exhaust setup at the same time. Let me know what you guys think. Thanks

 

Getting a bung welded in is pretty cheap honestly, I would put it in the downpipe about halfway between the turbo and the cat/testpipe