Kibblewhite White Diamond Stainless Steel Valves For Harley Features: Designed using Finite Element Analysis (F.e.a.) software, and profiles are tested on a computerized flow bench A 360 anode is used to produce the highest possible grade of hard chrome finish Light, strong, one piece forgings with profiles that provide excellent flow characteristics Keepers not included use OEM keepers and bases Sold individually Made in the USA Specs: Intake Head Diameter 1.571 Tulip Angle 10 Length 4.015 Stem Diameter 0.2347 Exhaust Head Diameter 1.264 Tulip Angle 24 Length 4.050 Stem Diameter 0.2342