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  1. #1
    Active Member One Ring
    Join Date
    May 19 2015
    AZ Member #
    Niota / TN

    2009 S5 cat delete

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    I've found a beautiful Red 2009 S5 Manual only issue is a CEL for a cat pre warm so the owner says .Wondering if anyone has done a cat delete on their 4.2 S5 and would share any lessons learned and what the cost of the conversion could run ?

  2. #2
    Established Member Two Rings Zingrox's Avatar
    Join Date
    Sep 03 2016
    AZ Member #
    My Garage
    2010 A4 currently being built

    Plenty of people have. Get o2 spacers or a tune to remove the code it'll throw

    As far as I've seen you have to drop the transmission to remove and replace the cats. I don't recall an hour quote for you, sorry, but it'll get you started

    Sent from my SM-N950U using Audizine mobile app


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