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Thread: A6 C6 2.7 TDI Decat/Downpipe

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  1. Re: A6 C6 2.7 TDI Decat/Downpipe 
    #11
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    Quote Originally Posted by Renesis View Post
    Diesels cannot currently fail on emissions alone as the only test for them on the MOT is a smoke test. The emissions are not tested like petrol vehicles so you won't fail if you gut the current cat.

    It will fail a visual inspection (and subsequently the MOT) if there is no cat present however, or that it is obvious that it has been removed. New rules came in to force in February 2014 stating all cars that had a cat fitted at factory must still have it installed or it's an instant failure. This didn't apply to diesels before which is why it was more commonplace. Remember it's just a visual check though, and when I removed the cat from my last car, it still passed as it was covered by the engine undertray... And testers are not keen to remove components to confirm these things.

    To answer your question however, there isn't currently a manufacturer that produces decat pipes for the 2.7 tdi, so it will need to be custom made, or the better solution would be to gut your current cat for no cost.
    If I gut the cat/get decat... will it through and engine code up...?
    Audi A6 58plate 2.7TDI Quattro Le Mans
    Full Leather - Bose - Xenon's - 6 CD - Bluetooth - Colour Sat Nav

    Mods Done: LED Rear Lights - Confirmation on Lock - 15mm Spacers all round - Cupra R Splitter - Gutted Cat - Removed Back Box's/Added Chrome Tips - Custom Remap +47BHP +80lbs Torque



     
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  2. Re: A6 C6 2.7 TDI Decat/Downpipe 
    #12
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    I know that an EGR delete will (these should be done with a remap and coded out), however am unsure if the sensors are that sensitive, if it does it will be the standard MIL which I don't believe is an MOT fail.
    XK8 96 Dyno'd at 305 and LPG converted, a mere 65ppl
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  3. Re: A6 C6 2.7 TDI Decat/Downpipe 
    #13
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    Guess what Mark, I am de catted.
    Have since passed several genuine Mot without the need to'know someone'
    I had my cat gutted so looks like still present and emission are still spot on.
    My opinion is don't bother getting decat pipe made (none available off shelf) as will fail mot on visual inspection

    2007 3.0tdi le mans
    hybrid turbo, decat,miltek, 20's etc
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    2007 3.0 tdi le mans : Hybrid turbo decat : miltek etc : 330-350 bhp : 450-500lbsft

    Visibility pack. Adaptive xenon, Privacy glass. Bose surround. Dvd nav. Comms pack, led plate lights.
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