E-street vs Promaxx vs 440 Source

318willrun said
it's the "rpm" range given my the manufacture. I really don't care if the RPM is correct or not, I didn't want Victor style heads for my build. It's why I sold the SM heads. The only reason.

I like the way you defy logic and laugh at it LOL... Your building a drag motor but you don't want heads capable of higher RPM... :popcorn:...