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  1. #1
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    adi.zafgsi's Avatar
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    funny noise

    Hi,

    Just de-restricted the airbox on the zafira gsi, and fitted the vectra air feed.
    But it now makes a racket when i change gear, like i've fitted a dump valve or summat.
    Dont sound right though.

    Anyone done this mod?
    Could i have done something wrong?
    Is it safe to drive?????

    any advice would be appreciated.

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    GSI-ANDY's Avatar
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    it will more than likely be the standard factory dump valve thats fitted to the side of the turbo that you can hear.

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    would more air going in make it a lot louder, like loads louder?

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    SRI-T Keithy's Avatar
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    its not more air its less resriction for the noise to come back out if you know what i mean

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