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    Newbie question about cat

    So, I've '89 325 with cat. I'm just wondering what are those two cylinderical things that are between the motor and cat. I'm making new exhaust, is it possible just to use cat and rear muffler and not to care about those two thingies?
    Thanks for your answers in advance.
    - E34 M5 (x 2) -
    - E30 V8 Cabrio "Kylpyamme" -
    - Alpina D10 Touring #33/94 -

    +
    - E46 318i Touring -
    - Toyota Hiace 4wd -

    #2
    Two cylindrical things? Do you have a picture?
    Originally posted by Gruelius
    and i do not know what bugg brakes are.

    Comment


      #3
      Nope, I think they are kind of pre-cats or something.. I'll try to find a picture on net.



      In this picture there are four of those cylinderical thingies, I've two of those (one in each pipe) before the cat. Mine are smaller than in this pic (pic of S50 in E30 I think) :)[/img]
      - E34 M5 (x 2) -
      - E30 V8 Cabrio "Kylpyamme" -
      - Alpina D10 Touring #33/94 -

      +
      - E46 318i Touring -
      - Toyota Hiace 4wd -

      Comment


        #4
        The two closest to the engine are the cats, the two behind them are the resonators.

        Comment


          #5
          Can those resonators be before cat? Guess not, on other forum ppl said that they would be kind of flame killers, so that the cat wouldn't burn. If they are flamekillers, I guess it'd be better to save 'em, but if they are resonators then they can be forgotten.
          Am I figuring this out right?
          - E34 M5 (x 2) -
          - E30 V8 Cabrio "Kylpyamme" -
          - Alpina D10 Touring #33/94 -

          +
          - E46 318i Touring -
          - Toyota Hiace 4wd -

          Comment


            #6
            flame killers?

            they are resonators.. what other forum are you going to? www.caridiots.com? :P
            Build thread

            Bimmerlabs

            Comment


              #7
              Hey come on, I told you I'm a newbie :oops:

              Anyways, can resonators be b4 cat? If they are, is there difference other than in sound?
              - E34 M5 (x 2) -
              - E30 V8 Cabrio "Kylpyamme" -
              - Alpina D10 Touring #33/94 -

              +
              - E46 318i Touring -
              - Toyota Hiace 4wd -

              Comment


                #8
                Resonators are almost always behind the cat.

                And there is such a thing as a "flame killer", but it's called a flame arrestor.

                "See, we're adding a little something to this month's sales contest. As you all know, first prize is a Cadillac Eldorado. Anyone wanna see second prize? Second prize is a set of steak knives. Third prize is you're fired."

                Comment


                  #9
                  Originally posted by e30Matt
                  Resonators are almost always behind the cat.

                  And there is such a thing as a "flame killer", but it's called a flame arrestor.
                  Commonly seen on airfields where fumes and vapors are everywhere.
                  https://www.facebook.com/BentOverRacing

                  Comment


                    #10
                    Originally posted by M-technik-3
                    Originally posted by e30Matt
                    Resonators are almost always behind the cat.

                    And there is such a thing as a "flame killer", but it's called a flame arrestor.
                    Commonly seen on airfields where fumes and vapors are everywhere.
                    :up: Also commonly found on boats where the vapors can be trapped under decks.

                    "See, we're adding a little something to this month's sales contest. As you all know, first prize is a Cadillac Eldorado. Anyone wanna see second prize? Second prize is a set of steak knives. Third prize is you're fired."

                    Comment


                      #11
                      Ahh, on Gas type right? no need for on a diesel.
                      https://www.facebook.com/BentOverRacing

                      Comment

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