1st Gen R53 Cooper S Header question - primary o2 bung

Discussion in '1st Generation: 2002–06 R50, R53 & 2004–08 R52' started by Professor, Dec 16, 2010.

  1. Professor

    Professor New Member

    May 4, 2009
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    BMW / MINI tech
    Kentucky
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    Why is it that on some header designs for the Mini, that the primary o2 sensor location is extended out a bit? I notice this on the OEM manifold as well but not on every header. What is the reason for pulling the primary so far out of the stream? Is there a gain to be had for this?
     
  2. AliceCooper

    AliceCooper Club Coordinator

    Mar 13, 2010
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    CT Technologist
    South Florida
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