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Downpipe - removal and possible upgrade question?

Nathan Revill May 4, 2012

  1. Nathan Revill

    Nathan Revill New Member

    So, I was driving out of a car park the other day and BOOM, this metal slug in the floor ripped the flexi in half on the downpipe so I need a new one. Just for the part Audi quoted £250, Euro Car parts don't do one, so I was looking at getting a new flexi and welding it on, or buying a second hand exhaust off eBay, but I have the opportunity to add a de cat downpipe, so a few questions.
    1. Do I really have to unbolt the drive shaft to the rear to remove the downpipe? I just cannot seem to get the exhaust out!
    2. If I put on a de cat from ebay like this one, will it fail the next MOT, as I saw somewhere that says, if your car originally had a cat, it must have one to pass the MOT now, and would if fail on emissions?
    If I do go down the welding a new flexi on, Anyone around Bournemouth want a few quid to weld it on?

    Its a 99V turbo Quattro, currently mapped to 212BHP.

  2. Lemon S3

    Lemon S3 Alex

    Yes a decat will fail an MOT, your best best would be to get a sports cat or some people put the cat back on for MOT time but thats a bit of aggro in my opinion.

    I don't know about how to change the DP as I've not done it before but if you use the search on here, you will prob find a guide on how to do it.
  3. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow... Staff Member Moderator Audi S3

    Should mention that the DP you have linked too isn't a straight fit for the A3 quattro... its for a fwd A3 which won't have the prop in the way... the A3 quattro uses twin cats like the S3 too but smaller bore..

  4. jay1601

    jay1601 Well-Known Member

    go de-cat. either just put the cat on for the MOT or if your friendly with a tester they will pass it for you
  5. actualeddie

    actualeddie Member

    is it easy to switch cat on and off if you have the tools/time?
  6. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow... Staff Member Moderator Audi S3

    depends on the setup... using the A3 DP linked to above you would need both the decat and sports cat version of the centre section (would possibly have to buy 2 x DP's to manage that) then you swap between the two as you need to...

    Of course that doesn't help if they decide to pull you over for a roadside spot check...


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