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Decat down pipe and mot

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  • Decat down pipe and mot

    Hi has anyones 3 year old vxr J failed its MOT for having decat or double decat ?


    or are you swopping them back for the MOT

  • #2
    Double decat will fail due to the lack of a cat present.
    Single may be ok if it can pass the emissions test.
    13 reg Arden Blue

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    • #3
      Originally posted by PHilA View Post
      Double decat will fail due to the lack of a cat present.
      Single may be ok if it can pass the emissions test.
      I thought in the UK you have to have all cats in place. If there are 2 cats from factory, 2 cats need to be there even if it passes emissions test with 1 cat. If the MOT guy is strict?
      -Vissa-
      Current: Type R FK2 2016

      Previous: J OPC 2012

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      • #4
        Originally posted by Vissa View Post
        I thought in the UK you have to have all cats in place. If there are 2 cats from factory, 2 cats need to be there even if it passes emissions test with 1 cat. If the MOT guy is strict?
        That's my understanding as well https://www.gov.uk/topic/mot/manuals checking the inspection manual 7.1.3 there is a reason for rejection for:

        "A catalytic converter or particulate filter missing where one was fitted as standard."

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        • #5
          Mine passed with only front cat in a centre box delet and this was done at a vauxhall dealership

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