youre right ,I wrapped mine underneath only ,then some what i could reach up,first off i dont reccommend trying it once theyre in .its a bit** .second the only place that rusted /peeled on my coated headers ,is were they were wrapped.Fact.Three,even stainless rust,cus i had those also,and they rusted in about 1 month,surface rust.I was dissappointed because i always thought ss stayed chrommey looking,wrong ,first turned blue in a week ,then rusty in a month.good luck
mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .