452 heads

Interesting between 400 and 600. I'd love to se a reading from .550... because the increase seems to plateau, then somewhere between .500 and .600 picks up again. If I was camming for these heads, I'd be looking to either stay below .500, or go above .600. They are a decent head, and much imporved over stock (yes, the exh #s are good), but it's a wierd step in the flow curve right where I wouldn't want it.