None of this makes any sense to me. Two weeks ago I installed a set of SE slip-on's. In addition to just installing them, I wanted to remove the header pipes and install new HD header gaskets in order to make sure I would have no leaks once the install was finished. Pulled everything apart, cleaned and inspected all fittings. Installed new wire mesh gaskets in each cylinder head. Installed the new HD header pipe SS wire mesh gaskets along with grade 8 header studs. Torqued the stud nuts to 120 in/lbs. Installed the slip-ons. Road the bike & all seemed perfect. The next morning after the bike cools off, I once again torque the header studs to 120 in/lbs. I expected they would settle in. Rode the bike, let it cool and once again the torque wrench would not "click off" until they were tighten a little more. The following day, once again the same thing. And again and again and again.... This has been going on every day for 10 days. The exhaust flanges are just about flush with the head (I think one actually is). I don't get it. Will these exhaust nuts ever terminate to a tightness of 120 in/lbs and stay there. I know the nuts are not actually loosening. They are going deeper and deeper, that much I know. It seems if I had tighten them just once and stopped there, in a short time the pipes would have a leak. It is like the heat is actually crushing the rounded fitting on the end of the header pipe each time the engine expands. I really don't have a clue and I don't want to take it all apart to see... Is there a problem or is it normal? Should the flanges be flush with the head? The book called for 120 in/lbs.