How many replacing Intake valves

[JD400exrider]

How many of you are replacing the intake or exhaust valves when you are doing the motor mods. 416, 426 kits. If so are you replacing with a black or white diamond or sticking with the oem valves.

Mine is torn down now. They seem to be sealing OK with no obvious problems.

[Ketch]

I'm replaceing my valves to Kibble White and one mm bigger.
The person that is going to port an flow the head sayed it was
worth it.:D

[UglyMotha™]

i stuck with the oem and had the head ported, i believe that if you go with larger valves with the smaller bore you'll lose bottom end but gain up top