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  1. #1
    MattS3's Avatar
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    Downpipe and sports cat, mated to OEM centre and backbox?

    As there is no gains, apart from noise, by going cat back, is there benefit of just replacing downpipe and cat, and utilising the existing pipework from cat back?
    2011 S3 Sportback S-tronic Black Edition - Revo stage 1
    2006 Mazda MX5 2.0 Sport - For track days and sunny days.
    2003 S4 V8 Saloon Manual Milltek Cat Back - Sold

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  3. #2
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    Yes, I had this setup on my car for 6+ months and had massive torque gains (50Nm!).

    Ultimately it does restrict top end power but you get 90% of the gains this way.

  4. #3
    MattS3's Avatar
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    Excellent, sounds positive.
    What model car were you running it on?
    And what set up did you have? For example, does the Milltek come with a reducer to fit the cat back OEM pipe, or can one be specified from Milltek as an off the shelf part?)

    Did it drone at all?
    2011 S3 Sportback S-tronic Black Edition - Revo stage 1
    2006 Mazda MX5 2.0 Sport - For track days and sunny days.
    2003 S4 V8 Saloon Manual Milltek Cat Back - Sold

  5. #4
    s3joe's Avatar
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    If you have a look in my posts I have just had a full bcs system fitted to my s3 and it's so much better

  6. #5
    downtothebone's Avatar
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    BCS downpipe and sports cat here as well ...
    APR Carbonio CAI / Eibach ARBs / BCS 3" Downpipe & Sports Cat / H&R 50mm Springs / APR Stage 2 / WALK / Forge Quickshift / RNSE / Forge 330 Big Brake / Carbon Grab Handles / Whiteline F&R Adj Drop Links / R8 Oil Cap / Porsche Coolant Cap / Front and Rear Footwell Lights / Puddle and Warning Door Lights / APR Intercooler

  7. #6
    MattS3's Avatar
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    Joe - Just replied to your other thread.
    Downtothebone - Have you just got downpipe and sports cat? (whats the Cat back set up you have?)
    2011 S3 Sportback S-tronic Black Edition - Revo stage 1
    2006 Mazda MX5 2.0 Sport - For track days and sunny days.
    2003 S4 V8 Saloon Manual Milltek Cat Back - Sold

  8. #7
    downtothebone's Avatar
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    Quote Originally Posted by MattS3 View Post
    Joe - Just replied to your other thread.
    Downtothebone - Have you just got downpipe and sports cat? (whats the Cat back set up you have?)
    OEM cat back - yes just the down pipe and sports cat
    APR Carbonio CAI / Eibach ARBs / BCS 3" Downpipe & Sports Cat / H&R 50mm Springs / APR Stage 2 / WALK / Forge Quickshift / RNSE / Forge 330 Big Brake / Carbon Grab Handles / Whiteline F&R Adj Drop Links / R8 Oil Cap / Porsche Coolant Cap / Front and Rear Footwell Lights / Puddle and Warning Door Lights / APR Intercooler

  9. #8
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    Quote Originally Posted by MattS3 View Post
    Excellent, sounds positive.
    What model car were you running it on?
    And what set up did you have? For example, does the Milltek come with a reducer to fit the cat back OEM pipe, or can one be specified from Milltek as an off the shelf part?)

    Did it drone at all?
    facelift S3 (3dr)

    I picked up a 100 cell MV Sports downpipe from a forum member and my garage added a reducer to suit.

    Definately no drone - you still have the OEM centre box afterall.

 

 

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