Thanks for choosing Superformance Products fastmark.
I'm quite certain you will be satisfied with the performance and durability of these gaskets. Like all the others we manufacture quality materials for the job is at the top on our priority list.

Getting your previously used stamped steel valve covers straight is imperative to sealing just like any other gasket surface.

Read the included instructions and do not tighten down from the "center-out" technique. Instead, tighten from the lower rear working your way across the bottom row then on to the top in steps.

These have been out for 5(?) years now. Surprised everyone don't know about them yet, one of our fastest moving gaskets because they flat out work for people. Also listed here on moparts in the "New Products" page.