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  1. #1
    ShaunS3's Avatar
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    Sports cat vs De-cat

    Irrelevant of MOT legalities, which will see the best improvements?

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  3. #2
    Markeyboy's Avatar
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    i would assume de-cat, due to there being no restriction,

    1.8T SPORT AUM
    18" TTRS wheels, de-badged grill, tints, TIP, forge 007P, toyo sports oil catch can,
    3" downpipe + decat, Toyosports FMIC, 10mm lowering cups, N249 bypass
    S3 Front Brake Setup, R-Tech stage 1.5 custom remap 218BHP@229FT/LB

    Progression Thread
    http://www.audi-sport.net/vb/a3-s3-f...8t-thread.html



  4. #3
    Customboy's Avatar
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    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 !
    p

    THE BLUE BEAST, TAKEN FROM ME, GONE BUT NOT FORGOTTEN
    RTECH STAGE 2 REMAP NOW RUNNING 223 BHP AND 253 FTLB OF TORQUE,
    SUBARU IMPREZA WRX ESTATE SOON TO BE RUNNING 340 BHP
    ANTI LAG/LAUNCH CONTROL/MAF LESS/ LOVE IT !!

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    <tuffty/>'s Avatar
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    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/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  6. #5
    Customboy's Avatar
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    We got to meet up markeyboy mate !
    p

    THE BLUE BEAST, TAKEN FROM ME, GONE BUT NOT FORGOTTEN
    RTECH STAGE 2 REMAP NOW RUNNING 223 BHP AND 253 FTLB OF TORQUE,
    SUBARU IMPREZA WRX ESTATE SOON TO BE RUNNING 340 BHP
    ANTI LAG/LAUNCH CONTROL/MAF LESS/ LOVE IT !!

  7. #6
    Markeyboy's Avatar
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    Quote Originally Posted by Customboy View Post
    We got to meet up markeyboy mate !
    i should be at the next ace cafe meeting hopfully

    1.8T SPORT AUM
    18" TTRS wheels, de-badged grill, tints, TIP, forge 007P, toyo sports oil catch can,
    3" downpipe + decat, Toyosports FMIC, 10mm lowering cups, N249 bypass
    S3 Front Brake Setup, R-Tech stage 1.5 custom remap 218BHP@229FT/LB

    Progression Thread
    http://www.audi-sport.net/vb/a3-s3-f...8t-thread.html



  8. #7
    Jimgrim77's Avatar
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    Quote Originally Posted by <tuffty/> View Post
    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/>
    agree entirely. cat and cat back...subjective at best.

    Sport cat will at least get you through an mot.

    Ming Blue S3, Stage 3 Hybrid Turbo, Custom Map, Bosch 480 injectors, Custom TIP, Forge FMIC, 3" Downpipe, 200 Cell Sport CAT, Full Stainless, XS Power Mani, 6 Paddle Clutch, Red silicone hoses, LCR Brembo's, Forge 007p, KW Suspension Kit, Green filter, THS Mounts, 11mm & 16mm spacers, H&R Anti-roll bars, RS6 18" alloys, Michelin PS3's, Red Dog Bone Mount, Neuspeed quickshift, Boost Gauge, Aero wipers, LCR splitter, Forge Tie-bars, LED bulbs, Armrest, Custom TT pedals.

  9. #8
    ShaunS3's Avatar
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    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.

  10. #9
    <tuffty/>'s Avatar
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    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/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  11. #10
    ShaunS3's Avatar
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    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?

  12. #11
    <tuffty/>'s Avatar
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    Quote Originally Posted by ShaunS3 View Post
    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?
    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/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  13. #12
    ShaunS3's Avatar
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    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?

  14. #13
    <tuffty/>'s Avatar
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    Nope... Welly runs a Milltek and has over 400hp...

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  15. #14
    ShaunS3's Avatar
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    Hmmm interesting

 

 

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