Cali ref question (finally passed)

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  • IRUNEDM
    E30 Enthusiast
    • Oct 2009
    • 1122

    #31
    Originally posted by isra
    what cats did you buy
    +1
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    Instagram - @e30_mtech2

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    • Highway1
      Mod Crazy
      • Jan 2009
      • 773

      #32
      The cats are Walker CalCat Part #80301. The parts catalog has to show it's for the year make model of the engine. The Ref checked the part numbers to make sure of this. Also the dual in dual out cats that Mangaflow says fit my motor will not pass because it's not "Factory Configuration." Factory configuration is dual pipes off of headers into one pipe (O2 sensor) then y back into TWO separate cats. he didn't care what I had after the cats so I had it y back into my single exhaust to save money.

      As for intake. anything forward of the maf didn't matter. I have a cone filter and because there are no vacuum hoses/sensors in the air box he didn't care.



      This is a pic of the oem cats. my new ones are the same configuration.

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      • 36brua
        Mod Crazy
        • Feb 2008
        • 689

        #33
        Congrats on the pass/sticker !! What down pipes did you use^. from manifold to O2 sens?
        My CA legal M60 swap

        The happening in our garage

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        • hwy84
          Advanced Member
          • Aug 2009
          • 190

          #34
          Originally posted by Highway1
          he didn't care what I had after the cats so I had it y back into my single exhaust to save money.

          As for intake. anything forward of the maf didn't matter. I have a cone filter and because there are no vacuum hoses/sensors in the air box he didn't care.
          Quoted for truth.

          I too have a random muffler, and a cone air (without CARB EO number), and still passed visual inspection at the BAR.
          Current:
          1991 325i Sedan - S50 Swap
          1988 325i Cabrio

          Past:
          1991 M3
          1991 318is
          1985 325e

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          • Highway1
            Mod Crazy
            • Jan 2009
            • 773

            #35
            Originally posted by 36brua
            Congrats on the pass/sticker !! What down pipes did you use^. from manifold to O2 sens?
            Custom down pipe into 2.5"

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            • IRUNEDM
              E30 Enthusiast
              • Oct 2009
              • 1122

              #36
              Sweet! Thanks for sharing info with us. Hoping to get my car legalized soon.
              Feedback
              Instagram - @e30_mtech2

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              • 36brua
                Mod Crazy
                • Feb 2008
                • 689

                #37
                Originally posted by Highway1
                Custom down pipe into 2.5"
                Thanks that seems to be a clean way to go
                My CA legal M60 swap

                The happening in our garage

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