Do the stealths really flow that much more ootb than a typical set of pocket ported iron heads? I know 440source claims big numbers, but looking at flow numbers from the only reliable source I could find it looks like they really don't flow much more except for above .500 lift. Is this really the case?

Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street