Exhaust Installation Problem

[lyzic]

Hi,

 

So I bought a bosal exhaust and bosal resonator to replace my rusted out stock stuff.

 

I got it taken off fairly easily, except for one problem which is mystifying.

 

Where I bolt the main exhaust on, just after the O2 sensors, there are 4 bolts. Are these bolts, or studs? Are they part of the original exhaust, or do they come off?

 

I had to cut one off flush, and none of them won't move. Won't even budge a little. They're so rusted I can't even tell if they had heads on them to fit a ratchet anymore.

 

I think I'll have to cut them out and put in bolts anyways, but looking for an answer so I know what I'm dealing with first.

 

Thanks!

[180sx]

Just cut them all off and be done with it.

[skulptr]

they're studs, like lug nut studs. i dont recommend pounding them out, you can (in my case) shock the manifolds to the point of breaking. i just heated mine up and pressed them out. once theyre red hot, they move like nothings holding them in.