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  1. #1
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    Question Downpipe - removal and possible upgrade question?

    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.

    Thanks.

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  3. #2
    Lemon S3's Avatar
    Alex

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    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.
    1999 APY S3 Imola Yellow

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  4. #3
    <tuffty/>'s Avatar
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    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..

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  5. #4
    jay1601's Avatar
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    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
    Audi A3 8L 1.8T breaking.
    front bumper, impact bar, slam panel, full engine and loom sold.
    everything else for sale.

  6. #5
    actualeddie's Avatar
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    is it easy to switch cat on and off if you have the tools/time?

  7. #6
    <tuffty/>'s Avatar
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    Quote Originally Posted by actualeddie View Post
    is it easy to switch cat on and off if you have the tools/time?
    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...

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

 

 

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