The Stage V heads that Tim at FHO sells are not stock, he has them CNC first before selling them.
I'm not sure what they flow but I do know they will make 800 HP on a 572 C.I. 10.5 to 1 compression pump gas motor at 6500 RPM with a mild street solid roller cam with dual 4150 EFI throttle bodies up


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)