Cat to downpipe bolts?

[ian52]

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.

[<tuffty/>]

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/>

[ian52]

It's on an s3. I was going to just cut them off.

[<tuffty/>]

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/>

[ian52]

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.

[<tuffty/>]

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

<tuffty/>