Z-Boy Posted November 1, 2014 Share Posted November 1, 2014 (edited) Hi I just got a quick question there are two bungs for the O2 Sensor, which one do I use.Red or Green? I think Green is closer to the Engine? Thanks Edited November 20, 2014 by Z-Boy Quote Link to comment Share on other sites More sharing options...
Z-Boy Posted November 20, 2014 Author Share Posted November 20, 2014 Updated post with an image, as we all know a picture is worth a thousand words. Thanks Quote Link to comment Share on other sites More sharing options...
Sam Mcgoo Posted November 20, 2014 Share Posted November 20, 2014 Looking at your picture, I would say you will use the ones circled red as they will be post CAT. The 350z has 4 sensors - 2 each side, one Pre CAT and one post CAT. The pre CAT sensor is fitted on the manifold downpipes so you won't need to touch them. The post cat sensors are the ones fitted on the rear of the OEM CATS so they will be the ones you swap over to the RED one on your picture. The others (green) will be spares if you wanted to fit AFR gauges etc... Quote Link to comment Share on other sites More sharing options...
-Bradders- Posted November 20, 2014 Share Posted November 20, 2014 Use whichever one your o2 sensor reaches lol that's what i'd do! or look on the standard ones where its located and duplicate that. Quote Link to comment Share on other sites More sharing options...
GMballistic Posted November 20, 2014 Share Posted November 20, 2014 Looking at your picture, I would say you will use the ones circled red as they will be post CAT. The 350z has 4 sensors - 2 each side, one Pre CAT and one post CAT. The pre CAT sensor is fitted on the manifold downpipes so you won't need to touch them. The post cat sensors are the ones fitted on the rear of the OEM CATS so they will be the ones you swap over to the RED one on your picture. The others (green) will be spares if you wanted to fit AFR gauges etc... ^^This. Quote Link to comment Share on other sites More sharing options...
Z-Boy Posted November 20, 2014 Author Share Posted November 20, 2014 Cool Thanks for your replies. Quote Link to comment Share on other sites More sharing options...
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