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Message: <blockquote data-quote="greyrex" data-source="post: 2623017" data-attributes="member: 2194">For OBD-0 cars, they used 1 sensor for 2 cylinders. This way if one bank of cylinders was running rich/lean, the computer could compensate, to some extent on one bank only.Look at the position of your current O2 sensors. Each sensor is tapped into the exhaust of 2 cylinders. I believe cylinders 1 and 4 are paired as well as 2 and 3 are paired. You want to mimic this. If you can have an exhaust shop weld bungs into your header that will allow for the stock configuration, it is best. The other way to do it is to install 1 O2 sensor and run both the primary and secondary wires to it.It's unfortunate. There are a lot of 1st gen B16's in the US but no one really makes a header for them. I think hasport may make one specifically for the double O2 setup, but I have never seen one.If you have a PR3 ECU, then you'll either have to pay a exhaust shop to weld up another bung, so you can use two O2 sensors, or you can splice both sensor wires into one sensor, which will make it run a little bit rich. You can correct that by getting a heated O2 sensor, and that should lean it out a bit. If you have a PW0 ECU, then all you need is one O2 sensor, and you're good to go.-----------------------------------------------------------------------------------------------------Bros...got this info from a superhonda & hondatech.Do you think this will work as i'm planning to get a brand new header which only have a bung near to the collector.Do you think by merging both 02 sensors wirings into 1 sensor would solve the problem?Cheers!</blockquote>

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