Exhaust Studs

[Dead Eye]

Right, instead of opening a new topic on basically the same issue, I've managed to snap off the nuts on 6 of the 8 studs. The ones that snapped required so little effort compared to the two that behaved that I just had no chance of not snapping them really - they appear to be the originals and the bike has 84k on the clock so...

I popped out to B&Q this morning and bought some M6 nuts at the advice of red98 (damn delivery hasn't turned up for some others I ordered) and attempted the whole tighten two of them together to be able to remove the stud. No such luck, the stud is stuck fast and the nuts are just grinding away their thread (the stud seems less affected thankfully).

My only choice now is going to be to drill them out, right? Does anyone have any other advice... or a drill with decent bits? I'm otherwise rather buggered. I can pay in beer tokens