OEM part number Harley-Davidson: 18074-05. Kibblewhite nitrided timing valve: Black Diamond™ valves feature one-piece stainless steel construction with stellite tips and special impregnation to improve wear properties and reduce friction: all valves are compatible with OEM and KPMI® valve guides and spring kits. Compatible with leaded and unleaded fuels: can be run in cast-iron and bronze-type huides at close tolerances for maximum oil control and heat dissipation. Keepers not included.