airbox plug??

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  • CW325
    E30 Fanatic
    • Jul 2011
    • 1434

    #1

    airbox plug??

    anyone know what this is?? i want to make a cai and idk if i need this?
  • jlevie
    R3V OG
    • Nov 2006
    • 13530

    #2
    If you are expecting power gains from a CAI you will be disappointed. The stock airbox with a clean filter is as good as it gets.
    The car makes it possible, but the driver makes it happen.
    Jim Levie, Huntsville, AL

    Comment

    • CW325
      E30 Fanatic
      • Jul 2011
      • 1434

      #3
      yea ive been reading things like that, i was just looking for an easy project to do. I found out its the air pressure sensor, do i need it??

      Comment

      • PReta
        E30 Enthusiast
        • Sep 2008
        • 1091

        #4
        it probably helps to keep it.
        -Paolo
        1986 325e RIP.
        1989 525i
        1986 635CSI

        Comment

        • CW325
          E30 Fanatic
          • Jul 2011
          • 1434

          #5
          where could i mount it with a cone filter?

          Comment

          • klavender1
            E30 Addict
            • Apr 2011
            • 400

            #6
            i noticed mine is unplugged. Have been running it that way for years. No adverse affect so far. I'm assuming it's for when you hit higher altitudes so the ECU can adjust.

            Comment

            • PReta
              E30 Enthusiast
              • Sep 2008
              • 1091

              #7
              i just put it next to the headlights. its just sitting loosely in there but it never moves anywhere
              -Paolo
              1986 325e RIP.
              1989 525i
              1986 635CSI

              Comment

              • CW325
                E30 Fanatic
                • Jul 2011
                • 1434

                #8
                thanks for the info

                Comment

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