Torqued to spec, 49 N-m per the factory manual. I do have some red here. Says it's good for 450 F, so about 1200 degrees short of where it *should* be, but I guess it wouldn't hurt... :-)
If it comes to drilling and safety wiring I'll involve a shop as I just don't see a good way to do that for this location.
Funny, I'd always heard of exhaust bolts breaking from being stuck. Never imagined vibrating loose would be a problem, but Google revealed it's actually quite the problem on smaller displacement, higher RPM engines!