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Audi s3 downpipe and de cat

Discussion in 'A3/S3 Forum (8L Chassis)' started by dec27871, Apr 21, 2010.

  1. dec27871

    dec27871 New Member

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    Hi guys im thinking of fitting a 3 inch downpipe and decat bit the one i was thinking of buying of ebay says i have to replace the engine mount to a dog bone one has any1 else heard of this and does any1 know were i can get a straight through centre pipe or just a back box for my 2000 s3
    chearz guys
     
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  3. Dani_B19

    Dani_B19 Audi-sports own special child.

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    A few people have fitted the xs power ones off ebay and say they are fine apart from they need some modifing to fit correctly.
     
  4. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp?

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    I have the XS power one from ebay, i had the head and turbo off the car at the time so it made modifying and fitting a lot easier.

    XS do buy it now for £310 or make a offer. Offer him £220 and you will get it
     
  5. s3dave

    s3dave TFSI Hybrid
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    they all have the dogbone mount, a guy on here is fabricating them a3turbo?
     
  6. Dani_B19

    Dani_B19 Audi-sports own special child.

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    When they first went on ebay, the xs power stuff was selling for peanuts, they also did a turbo manifold too but god knows what that was like.
     
  7. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow...
    Staff Member Moderator Audi S3

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    All A3's and S3's have a dogbone mount.... its the lower mount from the subframe to the bottom of the gearbox... if they are suggesting replacing the engine mount to a dogbone mount then they have got it round their neck wording it like that....

    What is more likely is that due to the 3" DP being a tighter fit then stiffer engine mounts are needed to prevent it from hitting things when the engine moves under load...

    I a have a power flex bush in mine which are about £30.... perfectly capable of holding it all together

    <tuffty/>
     
    #6 <tuffty/>, Apr 21, 2010
    Last edited: Apr 21, 2010
  8. dec27871

    dec27871 New Member

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    What sort of modifing do they need to fit.
    Any1 kno were to get a centre pipe or back from btw. Uprated that is lol
     
  9. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow...
    Staff Member Moderator Audi S3

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    Whats that in english??? lol

    <tuffty/>
     
  10. dec27871

    dec27871 New Member

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    Sorry m8 sum one eirlyer said you need to modify them to fit.can u send me the ebay link for the xs power downpipe.
     
  11. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp?

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    The bolt hole are out so they need redrilling also part of the flange need trimming

    As Tuffty said English as we don't like text talk on here
     
  12. MURRAYS444

    MURRAYS444 Member

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    What about if you just want to de cat the exhaust what is involved???
     
  13. Dani_B19

    Dani_B19 Audi-sports own special child.

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    Remove the cat for a de-cat section.
     
  14. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow...
    Staff Member Moderator Audi S3

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    The CAT isn't the restriction... the DP is.... You can fit a decat pipe which replaces the oem twin cats but doen't do much more than make your car illegal, trigger a CEL and fail an MOT...

    OEM CATs very rarely come off on cars with mileage in one piece... everyone I have removed needed the fixings to the DP chiselling or disc cutting off...

    Pipeworx DP looks ok, 3" with a 200 cell CAT....

    <tuffty/>
     
  15. Speedy Steve

    Speedy Steve Active Member

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    I have the Pipeworx DP dont know how the fitting was as Bill did it although it does seam to sit lower but that may just be down to size and space.
     
  16. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow...
    Staff Member Moderator Audi S3

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    Any 3" DP will be tight on a quattro, prob looks lower due to the CAT... the OEM cats are smaller diameter but there are 2 of them so enables it to be kept tighter up in the tunnel...

    The Pipeworx DP starts to bend round sooner than the OEM DP which makes it easier too fit from underneath but the OEM DP is still a git to remove...

    The Pipeworx DP turbo flange bolt holes are quite large too so there is room to adjust where it sits but they are a bugger to get at (soz Bill)

    <tuffty/>
     
  17. Freeman_1986

    Freeman_1986 Member

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    So is it not worth putting the decat on, just the downpipe? Would it still make any gains? Sound any different?

    And if I didn't bother with the decat just the down pipe, can I still get to stage 2? (With the other mods of course)
     
  18. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow...
    Staff Member Moderator Audi S3

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    Think there is a little bit of confusion here...

    You can't fit a 3" to OE cats... you will need to use the manufacturers decat of cat offering when fitting a 3" DP... Pipeworx for example supply a 3" DP with either a sports cat or decat...

    Just doing a decat on an OE DP won't really achieve much as its the DP thats restrictive... the problem if you change the DP to a 3" ONE then you have to change the cats anyway... Miltek offer a DP but its essentially the same as an OE one and not worth the money/effort as all you will have something just as restrictive and a massive hole in your pocket..

    <tuffty/>
     

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