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  • Racing Cat recommendation

    I'm upgrading the turbo to a GTX3071R on my S2 coupe and planning to fit a 3" downpipe.

    I am looking to fit a Racing Cat to keep everything legal.

    Any recommendations on a 3" Racing Cat?

    Power wise it will be running around 360bhp as the engine internals are being kept the same.

  • #2
    By race cat, I assume you mean a cheatah?


    For that power level an off-the-shelf 200 cell sports cat will do you fine, but to be honest for 360hp the stock cats will be fine.
    Panthero Coupé quattro 20vt
    Indigo ABY coupé
    Imola B6 S4 Avant

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    • #3
      Lol @ cheetah!

      My standard cats are a little worse for wear!

      I was thinking 200 cell but any recommendations of where I could get one from which forum members have used before?

      i have seen cheap ones on eBay which I want to stay away from.


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      • #4
        I was going to ask a very similar question but thought it as convenient to jump on this thread... I was under the S3 today fettling the handbrake before MOT in two days time and then realised the damn thing doesn't have a CAT fitted - unless its cunningly disguised as a flexi joint lol. Will be instant MOT fail in NI - no local friendly garages doing MOTs here - thats obviously how it passed the test last year as there isn't even an obvious place on the system (76mm downpipe straight through to Milltek back box) for a decat pipe.

        So I got to looking for universal sports CATs (200 cells) online - trying to avoid the cheap nasty ones on eBay - even though it will just be used for MOT on the S3 (and the S2 eventually).

        I see Milltek and Magnaflow seem to offer a universal sports CAT and the total diameter is 100mm - which I seem to have room enough for. Milltek is a good bit more expensive - whether that is down to grade of materials or the premium label I don't know yet.

        I am considering having the CAT fabricated with a short section of 76mm pipe (I have a spare length in the garage) using V-band fittings at each end. Again there are lots of cheap ones on eBay but I would be concerned about quality... Anybody know of reputable sources of stainless V-bands that don't cost the earth?

        There's a couple of local exhaust places that should be able to knock up what I need if I supply the parts along with the section of pipe where I need to slice in a CAT (or DECAT pipe).

        I really need a proper look at that front flexi joint on a ramp - hopefully there is a sports CAT already there and it will save me the grief... This pic of a similar looking sports downpipe with CAT & flexi on a Mk7 Golf gives me some hope. The MOT test will soon tell me.
        Attached Files
        Paul Nugent
        Webmaster http://S2central.net
        Administrator http://S2forum.com

        1994 S2 Coupe ABY - aka Project Lazarus
        2001 A6 allroad 2.5TDi - family tank
        2003 S4 Avant 4.2 V8 - daily burble

        Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)

        There are only 10 kinds of people that understand binary - those that do, and those that don't

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        • #5
          So... the S3 failed the MOT... but not for emissions. It failed for absolutely kak handbrake operation - not unexpected - the cost of two new rear calipers will actually end up more than parts required for a sport CAT, but that is easy work compared to the hassle of getting the zorst off the car and custom pipes made.

          Anyway getting back the plot on the CAT - turns out that a CAT test is only required in NornIron if the car was "first used on or after 1st July 2002" so the 2000 model year S3 can run free and legal without a CAT here - I think it must be the only good thing about car ownership in this armpit of Western Europe. It actually hit a respectable score of 0.7% CO and 168ppm for HC on idle so its well within the non CAT test limits of 3.5% and 1200ppm respectively. I had it in my mind that all cars from 1st Jan 2000 had to pass a CAT test but very delighted to be wrong about that.

          I had decided the universal 76mm stainless 200 cell sports CAT from Milltek was the way to go for around £150 plus V-bands & fabrication etc but I can keep that in mind for the S4 someday (dream on).
          Paul Nugent
          Webmaster http://S2central.net
          Administrator http://S2forum.com

          1994 S2 Coupe ABY - aka Project Lazarus
          2001 A6 allroad 2.5TDi - family tank
          2003 S4 Avant 4.2 V8 - daily burble

          Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)

          There are only 10 kinds of people that understand binary - those that do, and those that don't

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          • #6
            Get some caliper overhaul kits and still get the sports cats?

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            • #7
              I suggest a pair of these:


              On a more serious note - Magnaflow has a pretty decent cost-performance ratio.
              http://tuner.ee - http://www.facebook.com/tuner.ee

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              • #8
                Nice pussies (ahem). But yes, magnaflow looked a decent option too - think they have stainless as an option, but not 100% sure their lowest cost one is stainless - no biggie if its just annual fitment to pass an MOT though.
                Paul Nugent
                Webmaster http://S2central.net
                Administrator http://S2forum.com

                1994 S2 Coupe ABY - aka Project Lazarus
                2001 A6 allroad 2.5TDi - family tank
                2003 S4 Avant 4.2 V8 - daily burble

                Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)

                There are only 10 kinds of people that understand binary - those that do, and those that don't

                Comment

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