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Sports cat vs De-cat

Discussion in 'A3/S3 Forum (8L Chassis)' started by ShaunS3, Mar 29, 2012.

  1. ShaunS3
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    ShaunS3 Yorkshire & Humber Rep. Regional Rep

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    [Mar 29, 2012]
    Irrelevant of MOT legalities, which will see the best improvements?
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  3. Markeyboy
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    Markeyboy Fan of the R-Tech!

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    [Mar 29, 2012]
    i would assume de-cat, due to there being no restriction,
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  4. Customboy
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    Customboy Member

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    [Mar 29, 2012]
    I got a decat in mine and downpipe from toyosport best mod I ever fitted I still have the sports cat in the shed but decat all the way mate !
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  5. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Mar 29, 2012]
    On an S3 changing to a 3" DP is the better option...

    Then chose a decat or sports cat... subjective performance gains though between the two so a sports cat in a 3" DP will give the best gains/legality balance...

    <tuffty/>
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  6. Customboy
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    Customboy Member

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    [Mar 29, 2012]
    We got to meet up markeyboy mate !
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  7. Markeyboy
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    Markeyboy Fan of the R-Tech!

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    [Mar 29, 2012]
    i should be at the next ace cafe meeting hopfully
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  8. Jimgrim77
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    Jimgrim77 Member

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    [Mar 29, 2012]
    agree entirely. cat and cat back...subjective at best.

    Sport cat will at least get you through an mot.
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  9. ShaunS3
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    ShaunS3 Yorkshire & Humber Rep. Regional Rep

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    [Mar 29, 2012]
    Cheers guys. I'm looking at a 3'' XS downpipe, 120 cell sports cat and resonated miltek cat back.

    I would also assume de-cat due to no restrictions.

    Anyone know what diameter the Miltek systems are and if there are any power restrictions for resonated as aposed to non resonated. I'm lead to believe its just noise reduction.
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  10. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Mar 29, 2012]
    Milltek are 2.75"...

    I have a Milltek back box and a resonated custom 3" system so comparatively it is a non issue... main difference is resonated is a little quieter... Milltek systems aren't loud but do sound nice..

    <tuffty/>
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  11. ShaunS3
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    ShaunS3 Yorkshire & Humber Rep. Regional Rep

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    [Mar 29, 2012]
    May I ask why you opted to go for a custom system as aposed to off the shelf like Miltek? Curious.

    What diameter are the standard systems on the S3? What are the main restrictions?
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  12. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Mar 29, 2012]
    Opted for a 3" custom as I have a GT30 turbo and over 380hp... did have a straight through back box but it was too loud so swapped for the S3 Milltek one...

    Std S3 system is 2.5" and is squashed in places... std DP is main restriction on the S3...

    <tuffty/>
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  13. ShaunS3
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    ShaunS3 Yorkshire & Humber Rep. Regional Rep

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    [Mar 29, 2012]
    I see.

    So the 3'' DP going down to 2.75'' Miltek wont really cause any issues such as a step, thus reducing overall power?
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  14. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Mar 29, 2012]
    Nope... Welly runs a Milltek and has over 400hp...

    <tuffty/>
    #13
  15. ShaunS3
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    ShaunS3 Yorkshire & Humber Rep. Regional Rep

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    [Mar 29, 2012]
    Hmmm interesting :)
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