What do you use for header gaskets?

Well, it ain't leeakin, so, your in good shape. Thats all that need be.

I myself just replaced the stock headman gaskets with the Mr. Gasket Ultra seals.
I think that the header bolts became a tad loose. They came off to easy. This lead to a breach in the seal. Reguardless, the ultra seals were hired. I did the drivers side yeasterday, the 24th of 9.