1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

anyone running a large bore downpipe and decat on there S3 ?

Jonni Apr 13, 2013

  1. Jonni

    Jonni Active Member

    241
    33
    28
    As above is anyone running a large bore downpipe and decat on there S3 ? Are they super loud ? And what happens with the lambda sensors ?
     
  2. elrao

    elrao Member

    378
    16
    18
    Am sure there are, I had a de-cat on my TT - was a pain at MoT time, until I got introduced to a friendly MoT man!

    You usually need a remap that removes the error you get when your cat fails.
     
  3. Jonni

    Jonni Active Member

    241
    33
    28
    Yeh suppose that's the down side to a decat , mot time . Would there be much difference in performance between decat and sports cat if car was at stage 2 ?
     
  4. S3AMK20VT

    S3AMK20VT Member

    170
    11
    18
    Sound mega fun! I got milltek turbo back decat non-res. lambda sensors go back in
     
  5. Jonni

    Jonni Active Member

    241
    33
    28
    So just go back in and no faults . Obv would need mapping to suit
     
  6. big harty

    big harty Member

    307
    15
    16
    Yep. Sounds great and not too loud. Unless you hit the gass pedal hard. :p
     
  7. S3Alex

    S3Alex Rarely neutral Team Ibis TFSI Owners Group Gold Supporter Audi S3 DSG

    10,643
    4,704
    113
    Yes.

    It's not too loud unless you have either a backbox delete,or centre box( non-resonated) exhaust.

    P.S.....you don't need a decat until you're at Stg3 or above.
     
  8. Jonni

    Jonni Active Member

    241
    33
    28
    Cool . I am not wanting huge power like your car Alex just somthing with a nice amount of poke lol . So no higher than stage 2+ . So would a sports cat be fine
     
  9. coreythorny

    coreythorny Active Member

    463
    74
    28
    Are you thinking of fitting to the standard cat back?
     
  10. R34nel

    R34nel Active Member

    323
    33
    28
    I've got milltek resonated with decat and it is only a touch louder than standard, I had the non res before and I didn't like it, not so much really loud but very boomy
     
  11. Jonni

    Jonni Active Member

    241
    33
    28
    Nope when I do the exhaust it will be done all the way to the turbo and all at once .
     
  12. Jonni

    Jonni Active Member

    241
    33
    28
    Yerh that's what I don't want booming. Ah that's what I was thinking of res with decat . But will probs just go sports cat and non res

    Its a shame the standard exhaust wasn't stainless steel as I think it makes a nice sound lol
     
  13. S3Alex

    S3Alex Rarely neutral Team Ibis TFSI Owners Group Gold Supporter Audi S3 DSG

    10,643
    4,704
    113
    Stock exhaust sounds OK,but it's quite restrictive.
     
  14. R34nel

    R34nel Active Member

    323
    33
    28
    yeah I have to agree I also thought the stock system sounded alright
     
  15. DJ-S3

    DJ-S3 Active Member

    690
    43
    28
    Me. Got it mapped out. Love the sound of my Milltek.
     
  16. Jonni

    Jonni Active Member

    241
    33
    28
    Yeh thourt so
     
  17. pinterovski

    pinterovski Member

    667
    88
    18
    Here is mine Supersprint back box and fi76mm custom downpipe. Decate Non Res:p
     
    Last edited by a moderator: Aug 15, 2014
  18. R34nel

    R34nel Active Member

    323
    33
    28
    I want that supersprint jobby! why are their prices so unrealistic?
     
  19. coreythorny

    coreythorny Active Member

    463
    74
    28
    You seem that lad on VXRo who makes exhausts etc? His names Adam from Lincoln.
    I might be getting him to make me one after July unless I see a miltek etc for a good price.
     
  20. R34nel

    R34nel Active Member

    323
    33
    28
    I've just sold a milltek non res cat back you could have had that and just bought a downpipe to go with it, but I never thought
     

Share This Page