[Blittleton]

I have found our bolts loosening, so now I never use anything but pinch nuts on our header to side pipe bolts. No matter of the heat cycles they will stay tight. Now that being said, I try to use them only once, maybe over kill but once tightened, if I need to take them loose I replace the nuts with fresh new pinch nuts. I haven't any complaints with my customers with this. So give them a try. Do not use nylon lock nuts here, too much heat!!!

Bill