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Stock Catalytic vs Aftermarket

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    Stock Catalytic vs Aftermarket

    Looking to change my exhaust system up a little bit. I have the Magnaflow 14815 single-in dual-out. I recently fixed most exhaust leaks and now the whole setup is wayy to quiet. I am looking at a Magnaflow High Flow Cat. I ran the system before with no cat and loved the sound. I am looking to use a high flow cat to reduce the smell and some of the rasp, but not the sound. Anyone here using a high flow cat, and can tell me how much the sound changed vs no cat/stock cat?
    20% Accurate

    Morty: Well Summer maybe people that create things arenít concerned with your delicate sensibilities you know? Maybe the species that communicate with each other through a filter of your comfort are less evolved that the ones that just communicate? Maybe your problems are your own to deal with and maybe the public giving a shit about your feelings is a one way ticket to extinction.

    #2
    94008 model if that helps.
    I have researched videos and those don't help with the dB difference.
    20% Accurate

    Morty: Well Summer maybe people that create things arenít concerned with your delicate sensibilities you know? Maybe the species that communicate with each other through a filter of your comfort are less evolved that the ones that just communicate? Maybe your problems are your own to deal with and maybe the public giving a shit about your feelings is a one way ticket to extinction.

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      #3
      That doesn't look like a high flow cat, but I'm far from an expert...but am also interested in answer to this question.
      1991 318is
      2004 330ci
      2011 335d

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        #4
        Why is the factory cat so large???
        20% Accurate

        Morty: Well Summer maybe people that create things arenít concerned with your delicate sensibilities you know? Maybe the species that communicate with each other through a filter of your comfort are less evolved that the ones that just communicate? Maybe your problems are your own to deal with and maybe the public giving a shit about your feelings is a one way ticket to extinction.

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          #5
          Originally posted by HerbE30 View Post
          Why is the factory cat so large???
          Four our market, Australia, the factory cat also includes a resonator
          E30 320i vert
          But daily drive is Volvo V60 Polestar

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