Hey all, hopefully a quick amd easy question. Where my exhaust manifold meets up to the cat is rusted all to crap. Ive got a new gasket, but cant get the 2 remaining bolts out. Gonna try some heat, my question is, does anyone know what size the bolts are in case i cant keep one in tact to go to the hadware store for new ones? Thats it. Thanks guys and gals

 

Those bolts are normally rusted into place and damn near impossible to remove. They're not just regular bolts either. They're those barbed bolts.

If I were you I'd just cut them both out, drill both the holes out to 3/8" and bolt them back together with regular 3/8" bolts.