I'm cooked bro I need help...

I need to replace these exhaust studs but I cant get them out. As you can see I've tried several methods to get these out. I put a nut on each one pretty tight and loaded it with red loctite. It sat for literally weeks before I tried to unscrew it. The one on the left worked a bit before the nut itself started unscrewing instead of the stud. The nut on the right instantly came loose. What are my options here. How can I get these out?