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Thread: is this cat bypassing tool legal to use for super loud sound

  1. #1
    Senior Member
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    Jun 2006
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    is this cat bypassing tool legal to use for super loud sound

    i was wondering if there is a cat bypass system that can be use in place of the original cat. i seen a guy use one on his ferrai and it was a very loud sound. he said that it was a cat bypass piece which is a new product for sale recently. it can be switch to stock sound on a press of a button then turn back on when press again instantly to turn the super loud sound on. if you go to google and type in cat bypass you will get many items. does anyone here know anything about this new item?

  2. #2
    Senior Member
    Join Date
    Jun 2008
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    262

    Re: is this cat bypassing tool legal to use for super loud sound

    Sounds like he is talking about an old school bypass pipe. Think of a Y shaped pipe with a butterfly valve one end of the Y goes to the cat and the rest of the factory exhaust, the other end of the Y goes to nothing. The old school ones used like a choke cable to actuate the butterfly valve to switch from factory to open exhaust. While they are kinda cool they are also known to leak and or seize due to the exhaust heat and carbon build up.

    Matt

  3. #3
    Senior Member sc80's Avatar
    Join Date
    May 2008
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    795

    Re: is this cat bypassing tool legal to use for super loud sound

    in the place i leavin' now, people is trying to make it sound louder and with a little bit performance enhance by using oxy burner to burn few more bigger holes at the cat which allow the ext gas flow out much faster..dunoo if that work on your car...
    good luck trying....

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