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S3 downpipe + sports cat?

Discussion in 'A3/S3/Sportback (8P Chassis)' started by IbisJake, Mar 24, 2014.

  1. IbisJake
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    IbisJake Member

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    [Mar 24, 2014]
    Apologise firstly if this has been covered in another thread...

    Looking for downpipe and sports cat to connect to original exhaust so can go stage 2+ along with intake and pump.

    Have read that the milltek is a different diameter so may not mate up correctly?

    Want to keep the standard cat back part of exhaust as prefer the stealthy look and standard tips.

    What's my best option and best place to purchase?
    #1
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  3. Marshy
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    Marshy Settled in

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    [Mar 24, 2014]
    I'm wanting to do the same thing.
    Bcs will supply a downpipe with 200 cell cat and adapter to fit original catback but it's about £600
    #2
  4. Scoot Yo
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    Scoot Yo Member

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    [Mar 24, 2014]
    Do you not need the full system for stage 2+?
    #3
  5. IbisJake
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    IbisJake Member

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    [Mar 24, 2014]
    The milltek is around £650 but will then need connector from 3" to 2.5" to fit to standard exhaust, is the bcs one 3"?

    Thought it was just the down pipe and sports cat as the standard cat back isn't very restrictive, is 2.5" however so may be wrong?
    #4
  6. Marshy
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    Marshy Settled in

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    [Mar 24, 2014]
    The bcs is 3" and does include the reducer so ready to fit.
    Also the bcs one has a larger flexi than the Milltek and doesn't break welds.

    A downpipe is enough to go stage 2+ although you may not see all the extra power but I doubt you'd notice.
    #5
    steviedee likes this.
  7. Dave-S3
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    Dave-S3 Active Member

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    [Mar 24, 2014]
    Another option as heavily discussed on here yesterday is the Cobra system, its £820 for a full system with a sports cat. Seems like good value for money, but I'm not sure how many people on here run them or can rate them… Mark at BroTek aka Brodster on here gave me a very good price on the standard BCS full system not the power valve... give him a message :)
    #6
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  8. Keane
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    Keane Active Member

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    [Mar 24, 2014]
    Just a quick question .... Will just a down pipe fit a standard exhaust system ? I had nicer tips welded too my standard system as I liked the stock sound but found the tips way too small .... I'm now wanting a little more noise without changing the cat back. Cheers
    #7
  9. Marshy
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    Marshy Settled in

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    [Mar 24, 2014]
    If you buy a downpipe and say that you want to fit it to standard cat back then most will supply the reducer needed to fit.
    #8
  10. Muzza80
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    Muzza80 Well-Known Member

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    [May 10, 2014]
    Yup also just received a BCS 200 cell downpipe and centre link pipe which has the 3" - 2.5" reducer.
    #9
  11. Marshy
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    Marshy Settled in

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    [May 10, 2014]
    I bought a Cobra downpipe as I got a good price on it, certainly give a boost in performance but I found with my standard catback it was very raspy when cold.
    Too loud for my as I leave home at 5am
    Also when cruising at 80-90ish it was fairly noisy.
    I've since picked up a Milltek resonated catback which was only a few months old at a great price and now it sounds great.
    Not as good as my previous BCS system but for just over half the price I'm happy.
    #10
  12. Yeager
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    Yeager New Member

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    [Jul 20, 2014]
    I would like only to change the downpipe and keep the OE catback. I suppose it will be raspy no matter which
    downpipe I choose. Would it help if I mounted a resonator on the downpipe?
    #11
  13. Marshy
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    Marshy Settled in

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    [Jul 20, 2014]
    Doesn't matter which downpipe you mate to your original catback they are raspy when cold but sound ok when warm.
    Just a downpipe is enough to go stage 2+ as I'm currently running.
    I'm selling my Cobra downpipe because I want a BCS powervalve, it's always been on the cards but I wanted stage 2+ and funds wouldn't allow a BCS at the time.
    The cobra downpipe is a good reliable cheap way of going 2+ but if your a real fussy person then you pay for perfection.
    #12

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