What do they flow as delivered? My Indy/Canfield heads from Indy with their cnc job flowed 365cfm on the intake. The intake was 200cc's stock and 210cc's after Indy cnc'd them. Jeff@Modern opened up the bowls to 213cc's and got them up to 386cfm with his valve job. Indy advertised their Hi-flow heads with an oversize intake valve of 2.40" and 266cc intake port at over 400cfm. (the exact words were 480cfm reported)Dave