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A4 2.5 TDI V6 180, De-cat?

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by A4cab-Izzy, Feb 23, 2010.

  1. A4cab-Izzy
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    A4cab-Izzy New Member

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    [Feb 23, 2010]
    Hi guys,

    in need of some help here, i have been hearing many different opinions from people on this so see what your guys input is.
    I am thinking of a exhaust system for my audi a4.... I was thinking to de-cat it, with a full through 2.5" pipe without back boxes aswell?

    People have been telling me this will affect back pressure, and being a diesel i will loose torque? So i need some input before i proceed with anything.

    Thanks look forward to hearing from you guys

    :blink:
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  3. adamss24
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    adamss24 Well-Known Member

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    [Feb 24, 2010]
    Thats a load of rubbish ! If yours is the 180Bhp, then i will start by loosing the pre-cat (evil contraption) then i will move onto the main cats . Take them off and hit the innards with a long metal rod/copper pipe and get rid of the monolith inside. The noise wont increase and the turbo will spool quicker. It will also pass the Mot test as well...
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