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Thread: Cat removal question

  1. #1
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    Question Cat removal question

    Just read in another thread that you can legally remove the cat from a diesel!!
    I am about to have a twin exit setup on the vectra 1.9 cdti SRi, so want to know if this is correct, if so what is the advantage / disadvantage of doing this??

  2. #2
    Full Member Big Sig's Avatar
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    Yes you can as diesels only require a soot test, not an emmissions test as such.

    Not sure on the advantages or disadvantages.
    Now I need a turbo to keep up!

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    Regular Member smoggydovit's Avatar
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    Yup, legally you can run without the cat.
    Some people say de-catting a derv can damage the turbo........others say thats rubbish.
    As for gains............throttle pick up improves as does the noise but not sure about bhp/torque figures.......

    HTH

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