W2's

Rat Bastid said
That as cast W9 will out horsepower a fully ported Speedmaster head and not break a sweat. It wouldn’t even be close.

For a “As Cast” head, IMO, it’s think it flows pretty darn good.
I’ve heard of some extreme numbers coming out of them.
But back to as cast…..

The flow numbers suggest 9’s n the right car.
Just hang that valve open for a while and let it breath in.

With the layman math, 300cfm X’s 2 = 600 hp and a good working mind can exceed that.