stainless bolts are barstewards for self loosening, and its very unusual to get a grade as strong or tough as there steel counterparts. so they shear/snap easyer. the advantage is there going to undo easyer 10 yrs
but i've had manifolds on other cars snap studs off before and its a pain in the hole. stock maniolds never had a problem with but some aftermarket stuff where all the holes have been quite tight to the studs have caused problems