At what point would you step up to ferrea hollow stem valves

RustyRatRod said
Yeah, but the valves also have gravity on their side. I think some of yall are over thinkin this stuff. There's just no way in hell I'd run a hollow valve. I think it's splittin hairs and it's best to look elsewhere for "upgrades".

Unless You're runnin' a flathead, gravity is working against Your valves........control-wise....