[lust4speed]

The old Doug's header gaskets were an eighth inch thick and really lasted, but the ones now included seem to be a cost cutting measure.

We've totally switched over to Remflex gaskets and haven't had a failure. They were originally only available from the manufacturer, but Summit carries them now. I have had good luck with copper and aluminum, and while they don't get worse if they develop a small leak - they still leak somewhat. I use the soft metal ones on the drag car because it isn't possible to save the Remflex on removal. Drag car gets freshened up every so often (and who can hear a header leak over the open headers), while the street car better not come apart for many years. The good news is they seal good by sticking to the header and the head, the bad news is they split down the middle when it's time to pull the header off. We lost a rear header bolt and the next two had backed out away from the header flange on Wheelspin's TA, and the Remflex gasket kept its seal. All we had to do was replace the one bolt and tighten everything back down. That would have been death for a Doug's gasket.