So, I'm in the middle of replacing the exhaust manifold gaskets on my 300E, and I'm wondering if I should also replace all of the manifold studs as well. One needs to be replaced because it snapped off with the nut, but I'm concerned about the others snapping off flush with (or inside) the head.

Also, if I should replace the studs, do they take anti-seize where they go into the head? And do they just screw in hand tight?

Thanks,
Anthony