Header selection budget

I use the gaskets that come with cheapy headers or even cheap gasket set ones. Never had an issue but I always give both sides of the gaskets a light smear of silicone sealer. Let it go off before firing the motor and you're good to go. Whether it's because some of the silicone gets on the bolt threads too or not but I don't seem to have bolts backing out either. Just my experience.
Neil.