Kibblewhite Engine Exhaust Valve

All valve guides are made of Ampco-45, a high-performance compound made up of 80% copper to provide great heat conductivity and 4-5% nickel for wear resistance Spring sets contain springs and titanium upper collars; lower collars included where required; keepers not included Valves and guides are sold each; spring kits come complete for one motor Specs: Head Diameter: 26.0mm/Std Stem Diameter: 0.1760 in. Overall Length: 3.235 in. Tulip: 20 Degrees