On the stock downpipe, there is a 3-hole flange at the end that the cat/test pipe bolts to. Mine has two bolt holes and one stud. Is that the stock configuration -- or did they originally come with morel studs?

Either way, it's a normal screw-in stud, right -- not welded or otherwise fixed in place?

 

Tom, pretty sure three studs, regular screw in's. If the flange wasn't cast, seems like a good idea to tack weld the stud to the flange, this is one spot where studs work best.

 

Thanks. I may have removed a few studs when I installed the turbo -- for some reason -- but don't recall doing that. Anyone else?

 

I just put the car back down after a Sunday fun run pre inspection, three studs.

 

Yup, three studs.