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  1. #1
    Veteran Member Four Rings
    Join Date
    Sep 28 2009
    AZ Member #
    48463
    Location
    suburb

    Is it hard to weld in cats?

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    My car stinks too much catless. Is it expensive to add cars?


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    Audi S7 stage 2
    Audi allroad stage 3
    Audi q5 stage 1

  2. #2
    Veteran Member Four Rings
    Join Date
    May 09 2012
    AZ Member #
    93306
    My Garage
    08 A4 Avant, 05 Silver S4 2.7t swap
    Location
    Virginia

    Nope. Find a good exhaust shop. Easy. You can probably even bring them the cats you want welded in.

    Honestly Iím in the same boat. Answer could be to wait for winter when you drive with your windows up.


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  3. #3
    Veteran Member Four Rings
    Join Date
    Sep 28 2009
    AZ Member #
    48463
    Location
    suburb

    Do any cats work or must they be Audi allroad cats? I donít care if I lose a couple hp. It stinks!


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    Audi S7 stage 2
    Audi allroad stage 3
    Audi q5 stage 1

  4. #4
    Veteran Member Three Rings SteelyS6's Avatar
    Join Date
    Oct 29 2011
    AZ Member #
    83182
    My Garage
    2004 Atlas Allroad 6MT, 2001 Kermit stage 3
    Location
    Winnipeg Manitoba

    You probably want a cat like this. Should be easy for a good exhaust shop.

    http://www.42draftdesigns.com/magnaf...high-flow-cat/

  5. #5
    Veteran Member Three Rings
    Join Date
    Jun 07 2005
    AZ Member #
    6784
    Location
    Shepherdstown, WV

    I run those magnaflows, would need to confirm part number but 99% sure those.

    Granted mine are up top next to the turbos and then I wrapped them to keep the heat in but haven't thrown cat efficiency faults yet! That location is not one you can do in the car though so a bit more work.

    Last edited by chris86vw; 11-08-2018 at 06:30 AM.

  6. #6
    Veteran Member Four Rings
    Join Date
    May 09 2012
    AZ Member #
    93306
    My Garage
    08 A4 Avant, 05 Silver S4 2.7t swap
    Location
    Virginia

    If you run them in the midpipes it will be fine. Iím assuming since you are catless now the O2ís are already coded out. You will need the same diameter cats as the pipes you are welding them into. Take it to a competent exhaust shop. They can do this no issue and if they donít have the rights cats already they can certainly get some.


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