For my application yes, the cam I will be running is in the .650 range and they flowed about the 350 mark at that lift. Did I say 270 I meant [email protected] with a 2.18 valve I will be using a 2.15". The reason I added the max flow was to demonstrate that the flow did not die off at higher lift ranges but kept improving(Dont forget these ARE RACE HEADS). The real flow and power potential will be realised when the heads reach OZ and the motor is actualy built and run.Racer said:Flow at .800 lift is meaningless, especially in a street car. Its what they flow at half that lift that matters most.