The stock steel ones have always worked fine for me. Just make sure to wire brush both surfaces and install correctly. You put the two end bolts in, then drop the slotted ends of the gaskets down onto the bolts between the manifold and head. Slowly insert the remaining bolts and once they are all in place correctly, tighten to specs. Rock Auto has them all, both Ram Air and regular. Pontiac exhaust gaskets I take it a step further and use stainless steel bolts with a dab of anti-seize. You may need them to come off some day.