That's what I was pointing to, the gasket material being different between Magnum engines and other engines in regards to stock replacement Beer Barrel intake manifold usage. If somebody was bolt in an air gap on that gasket probably wouldn't matter but with that big chunk of aluminum growing and arching like it seems to have done layered gaskets will not work. I only glued It to the Head not the intake and I used edelbrock gasketcinch which is for that type of sealing.