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  1. #1
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    1.8T Quattro 8L - Exhaust

    I know this has probably been covered loads of times before but I couldn't find the answer anywhere.

    Am I right in thinking that I need a S3 exhaust system to upgrade the quattro?

    I'm thinking about the full system, not just the CAT back. But i don't want to limit myself later for when I upgrade the turbo.

    Been looking at scorpion & miltek any other recommendations?

    Next thing is prices... Who has the best deals that you guys & gals know off
    A3 1.8t quattro -
    THS high flow manifold, S3 milltek, Forge 007 DV, THS engine mounts, Performance Haldex Controller (blue), Panel filter

    Coming soon - FMIC, Hybrid K03 Turbo, Custom downpipe & high flow cat

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  3. #2
    beachbuggy's Avatar
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    Yes and No. You can fit a S3 exhaust but you'll need to keep the original downpipe as the 1.8T is a K03 turbo while the S3 is a K04. The good news is that the downpipe for the 1.8T Quattro goes onto the S3 cat and I think you'll find the biggest restiction will be in the k03 downpipe so that will be the limiting part of the exhaust. It does however make upgrading the turbo, should you so wish easier as the K04 and associated downpipe will then fit straight onto your new exhaust.

  4. #3
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    Thank you,

    OK that makes sense, Does that mean the S3 exhaust will fit the standard Cat which is on there now?
    If so I might as well saves some pennies for now and just buy the CAT back system until i upgrade the turbo?
    A3 1.8t quattro -
    THS high flow manifold, S3 milltek, Forge 007 DV, THS engine mounts, Performance Haldex Controller (blue), Panel filter

    Coming soon - FMIC, Hybrid K03 Turbo, Custom downpipe & high flow cat

  5. #4
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    Bumpy Bumpy - I want to buy it today
    A3 1.8t quattro -
    THS high flow manifold, S3 milltek, Forge 007 DV, THS engine mounts, Performance Haldex Controller (blue), Panel filter

    Coming soon - FMIC, Hybrid K03 Turbo, Custom downpipe & high flow cat

  6. #5
    1animal1's Avatar
    The Clar!! it mouves!!!

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    dave theres a group buy on miltek systems currently going if you havent seen it......
    Xbox 360 gamer ID : Timffy

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    Silver BMW 535D Tourer - Fully loaded 340BHP 700NM torque
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  7. #6
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    No I hadn't thank you woop woop
    A3 1.8t quattro -
    THS high flow manifold, S3 milltek, Forge 007 DV, THS engine mounts, Performance Haldex Controller (blue), Panel filter

    Coming soon - FMIC, Hybrid K03 Turbo, Custom downpipe & high flow cat

  8. #7
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    if you want to fit an s3 exhaust to your a3 quattro you will need to change one of the rear hangers as they are different on one side get one from audi they are about 15 dont know why bit silly really just one of the backbox hangers goes towards the wheel on s3 but on the a3 goes towards the rear of car but other than that will be a straight fit cat back system obviously i put a miltek non res on mine made it sound awsome

  9. #8
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    Thanks, well I have ordered it through the group buy. Just need to get hold of that bracket, What did you do about cutting the rear bumper?
    A3 1.8t quattro -
    THS high flow manifold, S3 milltek, Forge 007 DV, THS engine mounts, Performance Haldex Controller (blue), Panel filter

    Coming soon - FMIC, Hybrid K03 Turbo, Custom downpipe & high flow cat

  10. #9
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    i just cut a notch out same as the s3 has took a pic so you can see just take your time no rushing do a neat job

  11. #10
    thorsy22's Avatar
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    Or get an S3 bumper
    2001 Audi S3 - AMK 210bhp
    Tarox F2000 discs front - Tarox 401 Rallye+ pads
    Tarox F2000 discs rear - Tarox 112 Strada pads
    Goodridge brake lines
    TT pedals
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    Finally back on the road, have a HUGE list of mods and things to do now!


  12. #11
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    they dont look that great on an a3 i brought one tried it on but the rear arches arnt flaired enough looks alittle silly think you can just about getaway with an s3 front bumper but rear no

  13. #12
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    Thanks for the reply,

    Looks good to me, I don't like the S3 rear bumper anyway.

    I like being the under dog with a slightly tuned engine, with the setup I have in mind I should surprise a few S3s
    Last edited by b1gdave83; 18th August 2010 at 14:00.
    A3 1.8t quattro -
    THS high flow manifold, S3 milltek, Forge 007 DV, THS engine mounts, Performance Haldex Controller (blue), Panel filter

    Coming soon - FMIC, Hybrid K03 Turbo, Custom downpipe & high flow cat

  14. #13
    Welly's Avatar
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    Quote Originally Posted by b1gdave83 View Post
    Thanks for the reply,

    Looks good to me, I don't like the S3 rear bumper anyway.

    I like being the under dog with a slightly tuned engine, with the setup I have in mind I should surprise a few S3s
    I hear you, I used to love doing that myself. But then I went to the dark side and bought a S3 instead! lol.
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  15. #14
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    Lol I don't blame you, Two insurance groups higher for the S3!
    A3 1.8t quattro -
    THS high flow manifold, S3 milltek, Forge 007 DV, THS engine mounts, Performance Haldex Controller (blue), Panel filter

    Coming soon - FMIC, Hybrid K03 Turbo, Custom downpipe & high flow cat

  16. #15
    Welly's Avatar
    Testing dodgy Chinese gear...

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    I have found one for you dude, a downpipe that is.

    Cheap, however, it isn't.

    Regal Autosport Downpipe & Sports Cats

    Its on that page.
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    "Marriage is like a coffin and each kid is another nail."
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    Quote Originally Posted by Prawn View Post
    Wellyboots, you are quite literally my most favourite pikey in the entire world




  17. #16
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    That looks easier than having one custom made as i did,nothing available when i did mine,changing the front end makes a huge difference,the standard internal bore is tiny very restrictive.Cheers Andy
    06 A4 AVANT QUATTRO 2.0T S-LINE SE,GARNET RED, RS4 REAR ARB,SPACERS ALLROUND,H & R SPRINGS,B5 PERCHES,A6 V8 RIMS.PORSCHE CAYENNE TURBO S SIX POTS .REVO MAP ,STATIS CATBACK EXHAUST,PANEL FILTER.

  18. #17
    Dazboss's Avatar
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    Now im confused as my 1.8 T Quattro has no cat on the down pipe but has 2 x underfloor cats, system looks standard so what are my options. Also i have 1 lambda sensor which is pre cat ?
    Audi A3 Quattro Sport 180bhp

    Pic's comimng soon !

  19. #18
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    Quote Originally Posted by Welly View Post
    I have found one for you dude, a downpipe that is.

    Cheap, however, it isn't.

    Regal Autosport Downpipe & Sports Cats

    Its on that page.
    Thanks

    But I found that already, but I wasn't loving the price its the sports cat which does it. If had known before I bought the cat system system on the group buy I could have saved 30% (-260! Ah balls)
    Last edited by b1gdave83; 20th August 2010 at 09:35.
    A3 1.8t quattro -
    THS high flow manifold, S3 milltek, Forge 007 DV, THS engine mounts, Performance Haldex Controller (blue), Panel filter

    Coming soon - FMIC, Hybrid K03 Turbo, Custom downpipe & high flow cat

  20. #19
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    Same as mine buddy, twin cat after downpipe.
    A3 1.8t quattro -
    THS high flow manifold, S3 milltek, Forge 007 DV, THS engine mounts, Performance Haldex Controller (blue), Panel filter

    Coming soon - FMIC, Hybrid K03 Turbo, Custom downpipe & high flow cat

  21. #20
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    Quote Originally Posted by djdougalno1 View Post
    if you want to fit an s3 exhaust to your a3 quattro you will need to change one of the rear hangers as they are different on one side get one from audi they are about 15 dont know why bit silly really just one of the backbox hangers goes towards the wheel on s3 but on the a3 goes towards the rear of car but other than that will be a straight fit cat back system obviously i put a miltek non res on mine made it sound awsome
    Do you know the part number of the hanger?, I've had a look on VAGCAT but unable to find the S3 part number. It looks like it's the hanger closest to driver rear wheel. is it 1J0253144R??
    Last edited by b1gdave83; 20th August 2010 at 10:25.
    A3 1.8t quattro -
    THS high flow manifold, S3 milltek, Forge 007 DV, THS engine mounts, Performance Haldex Controller (blue), Panel filter

    Coming soon - FMIC, Hybrid K03 Turbo, Custom downpipe & high flow cat

  22. #21
    Welly's Avatar
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    Quote Originally Posted by b1gdave83 View Post
    Do you know the part number of the hanger?, I've had a look on VAGCAT but unable to find the S3 part number. It looks like it's the hanger closest to driver rear wheel. is it 1J0253144R??
    Is VAGCAT working again?

    EDIT: Yes it is - Whoop whoop.
    ------------------------------------------------------------------------------------------
    "Marriage is like a coffin and each kid is another nail."
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    Quote Originally Posted by Prawn View Post
    Wellyboots, you are quite literally my most favourite pikey in the entire world




  23. #22
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    Bump

    Does anyone know if this is the part number I need? 1J0253144R?? to fit S3 exhaust to a 1.8T quattro
    A3 1.8t quattro -
    THS high flow manifold, S3 milltek, Forge 007 DV, THS engine mounts, Performance Haldex Controller (blue), Panel filter

    Coming soon - FMIC, Hybrid K03 Turbo, Custom downpipe & high flow cat

  24. #23
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    Just to confrm yes it is 1J0253144R. fitting my milltek now!
    A3 1.8t quattro -
    THS high flow manifold, S3 milltek, Forge 007 DV, THS engine mounts, Performance Haldex Controller (blue), Panel filter

    Coming soon - FMIC, Hybrid K03 Turbo, Custom downpipe & high flow cat

  25. #24
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    Just for info:

    I also needed a step up adaptor from the existing Cat to the new S3 Milltek,the stainless is considerably bigger. I will be getting a high flow downpipe and cat shortly but the adaptor will do for now.

    I have also had to modify the heat shield under the boot to except the new bracket, just cut a bit out. I knew the bumper needing cutting, but I'm pritty sure I will also have to cut a bit of the metal away behind the bumper I have special tips which are a bit bigger than the jet ones.

    The other thing is, the exhaust bracket which was replaced with the S3 one now needs to replace the existing one on the other side, as the milltek hanger is closer to the back. I may have to space it down a few 'mm' down as well but no biggy.

    I'll take some photos when finished to help anyone else out who is considering this.
    A3 1.8t quattro -
    THS high flow manifold, S3 milltek, Forge 007 DV, THS engine mounts, Performance Haldex Controller (blue), Panel filter

    Coming soon - FMIC, Hybrid K03 Turbo, Custom downpipe & high flow cat

  26. #25
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    Completed at the weekend - Sounds Perfect!

    First impressions.... Performance is defiantly better pulls much quicker through the rev range. Sounds lovely, not to load not to quite.

    Bit of fiddling around with the cutout think I ended up doing it three times to get it just in the right place,

    Only downside my dodgy centre bit was blowing this morning. I'll redo it later

    Some photos below, some of them are at the early stages - Procedure is as posted above ^

    Pictures by B1gdave83 - Photobucket
    A3 1.8t quattro -
    THS high flow manifold, S3 milltek, Forge 007 DV, THS engine mounts, Performance Haldex Controller (blue), Panel filter

    Coming soon - FMIC, Hybrid K03 Turbo, Custom downpipe & high flow cat

  27. #26
    Dazboss's Avatar
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    Looks very good Dave. How much was your system ?
    Audi A3 Quattro Sport 180bhp

    Pic's comimng soon !

  28. #27
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    Thanks buddy, I'm pretty chuffed with it as well. Looks much better in real life than just the pictures.

    I managed to get the CAT back on on a group buy, 370 ish including VAT and delivery.

    Just after a cheaper solution for the high flow cat and downpipe now Milltek want roughly 850!!!.
    High flow manifold will be order in the next couple of days,
    1.8T High Flow Transverse Manifold - THSCMA-18T-TV

    Once that's done, I'll be installing a FMIC and then ready for Bill @ Badger 5 to do he's magic
    (new injectors and larger MAF, and hybrid turbo)

    260BHP+ here I come baby
    A3 1.8t quattro -
    THS high flow manifold, S3 milltek, Forge 007 DV, THS engine mounts, Performance Haldex Controller (blue), Panel filter

    Coming soon - FMIC, Hybrid K03 Turbo, Custom downpipe & high flow cat

  29. #28
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    Woop Woop Manifold on order looking for ceramic coating now, but I don't fancy paying over 200 more like 80.

    Does anyone know someone who is cheap but good, as I don't want it to flake off.
    Last edited by b1gdave83; 10th September 2010 at 14:57.
    A3 1.8t quattro -
    THS high flow manifold, S3 milltek, Forge 007 DV, THS engine mounts, Performance Haldex Controller (blue), Panel filter

    Coming soon - FMIC, Hybrid K03 Turbo, Custom downpipe & high flow cat

  30. #29
    reptor245's Avatar
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    Quote Originally Posted by 1animal1 View Post
    dave theres a group buy on miltek systems currently going if you havent seen it......
    Dont want to rain on a parade but ive just had word from a police officer that they are going to make it illegal to have a aftermarket / non standard exhaust system. It will be part of the M.O.T. not sure when but just like the new regs on Reg fonts that is now part of the M.O.T, the aftermarket exhaust will be too. Ring your local police station to varify this.
    Audi A3 1.8 Turbo, Wietec Ultra GT 40mm kit, 3" Full Custom Stainless Steel Exhaust, Custom Code stage 1 remap, 17" RS4 Alloys, Whiteline ARB

  31. #30
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    ^^ thats bull, one of best mates is a police officer.

    They are clamping down on loud exhaust systems that's it, with regards to MOT all they are doing is bringing the readiness tests in.

    Think of all the cars out there with after market exhausts, can't ban them all
    A3 1.8t quattro -
    THS high flow manifold, S3 milltek, Forge 007 DV, THS engine mounts, Performance Haldex Controller (blue), Panel filter

    Coming soon - FMIC, Hybrid K03 Turbo, Custom downpipe & high flow cat

  32. #31
    reptor245's Avatar
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    Quote Originally Posted by b1gdave83 View Post
    ^^ thats bull, one of best mates is a police officer.

    They are clamping down on loud exhaust systems that's it, with regards to MOT all they are doing is bringing the readiness tests in.

    Think of all the cars out there with after market exhausts, can't ban them all
    M8, My girlfriend is a traffic officer and she has been informed it is going to be part of the M.O.T check for any non standard exhaust. If its "Bull" then no need for you to worry is there.
    Audi A3 1.8 Turbo, Wietec Ultra GT 40mm kit, 3" Full Custom Stainless Steel Exhaust, Custom Code stage 1 remap, 17" RS4 Alloys, Whiteline ARB

  33. #32
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    Lol i'm not worried, because I don't think its going to happen. I wouldn't be worried anyway, no difference to putting the CAT back on for

    Thank you for your input
    Last edited by b1gdave83; 14th September 2010 at 13:54.
    A3 1.8t quattro -
    THS high flow manifold, S3 milltek, Forge 007 DV, THS engine mounts, Performance Haldex Controller (blue), Panel filter

    Coming soon - FMIC, Hybrid K03 Turbo, Custom downpipe & high flow cat

  34. #33
    Syvo's Avatar
    IF IN DOUBT GO FLAT OUT

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    lmao i would pay to see the police pull all the cars in the country over to check for non standard exhaust.
    so if your exhaust goes you carnt buy a non genuine exhaust lol
    no chance the police and gov are trying to stop lots of thing to do with mods on cars its never going to happen to many cars are modded to stop it now

 

 

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