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Decatting a s3

Discussion in 'A3/S3 Forum (8L Chassis)' started by Goubo1, May 23, 2013.

  1. Goubo1
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    Goubo1 Active Member

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    [May 23, 2013]
    Seen a decat pipe for an s3 and was wondering if I fitted it would there be any running problems or just throw a light on the dash but the car will still be ok ?
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  3. Squirrelofdoom
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    Squirrelofdoom Member

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    [May 23, 2013]
    what's your engine code mate? Mines an APY (so no post-cat lamda sensor) and everything is fine with my decat
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  4. cecilthesausage
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    cecilthesausage ...It's Never Finished...

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    [May 23, 2013]
    Mine was the same.... John Ashley Exhausts....
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  5. harvey01
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    harvey01 Member

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    [May 23, 2013]
    i put one on my amk s3 i put a lambder space on and never had a light or problem . its for sale i might add as ive since fitted a 3inch downpipe and sports cat
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  6. Goubo1
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    Goubo1 Active Member

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    [May 23, 2013]
    It's a apy with mtm k26 conversion it has a sport cat on it just now I believe but wanting to go decat as my mates stage 2 s3 sounds wicked decatted
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  7. jojo
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    jojo S3 Drift King! Staff Member Moderator

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    [May 23, 2013]
    Much difference with the additional 3" downpipe?
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  8. StaceyS3
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    StaceyS3 Well-Known Member

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    [May 24, 2013]
    Would have thought a 3" downpipe will probably make a big difference as the mtm kit retains the split/dual cat setup

    There still must be a gain in running a decat though as its going to be less restrictive than a cat ;)
    #7
  9. Goubo1
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    Goubo1 Active Member

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    [May 24, 2013]
    a better downpipe is on my list mate,am I right in thinking the mtm one has a rather sharp/tight bend when it comes of the turbo ? As I seen a picture of one and I'm sure it was of one of a mtm k26.

    just I seen a decat for sale mate so was thinking on buying it
    #8
  10. harvey01
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    harvey01 Member

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    [May 24, 2013]
    yer seem to be better but a pig to fit and pricey . only worth it if like me your going for a stage 2 map
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