Q: Headers don't have O2 sensor bungs.

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I have a set of headers that are for a 2002 Impreza, which has the same engine, but the stock manifold for my car has two front O2 sensors, while the headers only have one, after the collector. How can I fix this and or make it work? Thank you very much.

My car has 206000 miles.
My car has an automatic transmission.

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