High temp lock tite won't work.....it will just burn off.Here are the nuts that I use...........
http://www.boltdepot.com/preva....aspxBest thing since sliced bread. I use to use regular nuts with lock washers, and they would always back off after a few hundred miles. I even spent $$ and let Nissan put all new hardware on, with those stupid lock plates, and the nuts still backed off. The cure for me was those prevailing torque lock nuts. The way their designed, they can't back off. Cheap too.....less than .50 cents a piece.Another thing to check is your exhaust.......if it's hung too rigid without a flex bellow, then stuff's gonna start working itself loose.