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Thread: cat question

  1. #1
    Regular Member Dimscreen's Avatar
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    Vehicle : Vectra

    Trim : GSI

    Engine : 3.2

    Year : 2002

    Default cat question

    Can i decat my GSI and if so will it pass it's MOT, flexi has gone on cat and been quoted £398 plus fitting for a replacement, Mrs is gonna kill me 5 weeks till Christmas and 3 kids any help pls !!!

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    Quote Originally Posted by Dimscreen View Post
    Can i decat my GSI and if so will it pass it's MOT, flexi has gone on cat and been quoted £398 plus fitting for a replacement, Mrs is gonna kill me 5 weeks till Christmas and 3 kids any help pls !!!
    Yes you can and it will pass the MOT - there is a precat further up the that controls the emissions. Instead of buying a new front pipe get a new flexi joint welded in. If you take it to somewhere like MIJ in Walsall they can weld in a new flexi joint and decat it for about £100! There are actually two flexi joints in the front pipe - it's probably worth getting both of them done at the same time - but obviously if you have them both done that will be a bit extra! HTH

  3. #3
    Regular Member winnie2457's Avatar
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    Not if it's a petrol it will fail on emissions unless you are very friendly or know a mot tester but that would be illegal of course

    Either put a decat pipe on until you can afford to replace it or bite the bullet and buy a new one

    I it was a diesel the. You don't need a cat for the mot lol

  4. #4
    Regular Member gtr1000's Avatar
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    Vehicle : Insignia

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    Default

    Quote Originally Posted by winnie2457 View Post
    Not if it's a petrol it will fail on emissions
    No it won't fail. What matters is the emissions at the back, regardless of how you achieve the results. Been there, done it.

    Take a look at http://www.vectra-c.com/forum/showthread.php?t=59699

  5. #5
    Regular Member Dimscreen's Avatar
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    Vehicle : Vectra

    Trim : GSI

    Engine : 3.2

    Year : 2002

    Default

    thanks for the replies, really is clear as mud now

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    Quote Originally Posted by winnie2457 View Post
    Not if it's a petrol it will fail on emissions unless you are very friendly or know a mot tester but that would be illegal of course

    Either put a decat pipe on until you can afford to replace it or bite the bullet and buy a new one

    I it was a diesel the. You don't need a cat for the mot lol
    Not true - as I've said there are precats on the GSI - these control the emissions! The main cat can be removed without emissions being affected!

  7. #7
    Regular Member Dimscreen's Avatar
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    Default

    Quote Originally Posted by dae36 View Post
    If you take it to somewhere like MIJ in Walsall they can weld in a new flexi joint and decat it for about £100! There are actually two flexi joints in the front pipe - it's probably worth getting both of them done at the same time - but obviously if you have them both done that will be a bit extra! HTH
    thanks for the info do you know of anyone closer to the Chester area that does it ?

  8. #8
    Regular Member gtr1000's Avatar
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    Quote Originally Posted by Dimscreen View Post
    thanks for the replies, really is clear as mud now
    Which bit is unclear?

    Those of us that have done it, you will pass the MOT.

    If you're unsure, listen to those that haven't done it and don't bother.

    Simples

  9. #9
    Regular Member signumturbo04's Avatar
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    you can get the flexi uself from dingbro part number frp13k and its held on with two exhaust clamps (one each end obv lol) when u cut out yyour old one and the total cost for the flexi and two clamps inc vat is £36

  10. #10
    Regular Member Dimscreen's Avatar
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    Vehicle : Vectra

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    Default

    Quote Originally Posted by gtr1000 View Post
    Which bit is unclear?

    Those of us that have done it, you will pass the MOT.

    If you're unsure, listen to those that haven't done it and don't bother.

    Simples
    Found that slightly insulting
    maybe i commented before seeing your link

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