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Cat to downpipe bolts?

ian52 Jan 30, 2012

  1. ian52

    ian52 2000 a4 1.8tqs-yellow

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    Are they bolts or are they studs? What ever they are they look like it would be easier to cut them and put new bolts in when i put it back together but dont want to be drilling out studs or anything like that if i can help it.
     
  2. <tuffty/>

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

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    What car dude? S3 or TQS with twin cats has press fit studs in the cats that are normally so corroded I normally have to air chisel the nuts off....

    FWD A3's have a different set up but can't remember what of hand..

    <tuffty/>
     
  3. ian52

    ian52 2000 a4 1.8tqs-yellow

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    It's on an s3. I was going to just cut them off.
     
  4. <tuffty/>

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

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    If you plan to reuse the cat then you may have to drill out the old studs and retap to a larger size to fit some replacement studs... you won't get bolts in behind the flanges due to the proximity of the cats...

    <tuffty/>
     
  5. ian52

    ian52 2000 a4 1.8tqs-yellow

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    It looks like the studs on mine go from the downpipe to the cats. Nuts are on the cat side anyway. It may just be very rusty bolts.
     
  6. <tuffty/>

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

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    OEM cats are studded on the cat side... the nuts rust to mostly nothing

    <tuffty/>
     

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