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Thread: Straight pipe

  1. #1
    Join Date
    Nov 2016
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    Los Angeles
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    2007 X5 4.8i, 2009 335i

    Straight pipe

    Hi,

    I have a question about straight piping my 2007 BMW X5 4.8i (E70). I currently have only one of the two exhaust pipes straight piped.

    Is this bad for the car? Will this cause misfires?


    Thanks.

  2. #2
    Join Date
    Jun 2005
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    M3 Buildup
    It can definitely cause misfires. Just experienced this on an american car. The exhaust was so rusted out on one side bank 1 ran like garbage. Fuel trims were crazy, bank 2 was also overcompensating fuel trims more than likely as a failsafe. Misfire on 2 of 4 cylinders from leak. More than likely due to engine wear and lack of back pressure
    Buy my native installed ISIS ISTA-D/ISTA-P bmw diagnostic laptop. More Info Here!

  3. #3
    Join Date
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    Luv the description of your location, Driiven LOL
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  4. #4
    Join Date
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    Kilmarnock, VA
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    Quote Originally Posted by werdn View Post
    Is this bad for the car? Will this cause misfires?
    Yes. And also illegal and tacky.

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