K24.Ferrea vs OEM valves

flowed the head with  ferrea and oem valves to see if there is any difference.  i am told that ferrea flows better than oem valves.
the flowbench showed me that is not true. ferrea valves are flowing less than oem valves, about 10CFM less.

here you can see the difference between both valves. ferrea at right.

i worked on a ferrea valve making a multi angle profile. here is difference between a jaas worked valve and standard ferrea valve. jaas worked at left.

achieved 286CFM at max lift. i have no spare k24 head, so i can't go further without risking my customers head.i think this is enough for customer purpose.

work in progress and almost final design of intake port.