Kibblewhite Intake Valve For Harley Features: One-piece stainless-steel, stellite-tipped valves impregnated by a special nitrided process with .002 depth and .0002 surface buildup to improve wear properties and reduce friction This process provides resistance to corrosion wears superior to hard chromium and electrolysis nickel-plating Lightweight with profiles that provide excellent flow characteristics Compatible with leaded and unleaded fuels and can be run in cast iron- and bronze-type guides at close tolerances for maximum oil control and heat dissipation Stem Diameter 0.3106 Head Diameter 1.840 Length 4.445 Tulip Angle 23 Replaces OEM 18074-83 A Made in the USA