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Hey guys, not sure if my google-fu sucks or what. Thought I'd try here to find some answers. For those who have supercharged their car and have installed a wideband AFR gauge with stock headers, where are you guys mounting your O2 sensor at. I've seen a thread where they have welded the O2 bung on their front pipe right before the cat, or on their overpipe, but instructions and other people say to place the sensor before any cat. Does that mean you can't have any cats in front of the sensor including the primary to have an accurate reading. Or does it mean you just have to have it in front of a cat? So would I be good welding the O2 bung to either the overpipe or the front pipe? Any help would be appreciated.
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