Part Description
A, Type: in. Black Diamond, Head dia.: 2.000", Stem dia.: .3107", Profile: 23°, Lenght: 4.780"
Text excerpt from the catalog:
For the engine tuners that want ultimate performance from their ported and flown heads, Precision Machining designed special shaped valves with oversized heads and extra long stems. These high performance valves are available in various materials. Exhaust valves have the patented 44 degree tulip angle for improved flow and higher gas speed. Stems need to be shortened to required length and keeper grooves need to be machined. These valves are a must in every performance shop. Note: These are not stock replacement valves, they require machining by a professional with professional equipment.
