Valve, Intake/Exhaust

Face Angle 45°-45.5°
Head Diameter Intake 48.64-48.90 mm (1.915-1.925 inch)
Head Diameter Exhaust 40.01-40.26 mm (1.575-1.585 inch)
Length Intake (Overall) 103.0 mm (4.055 inch)
Length Exhaust (Overall) 102.7 mm (4.043 inch)
Valve Margin-Intake 1.2 mm (0.047 inch)
Service Limit 0.7 mm (0.027 inch)
Valve Margin-Exhaust 2.0 mm (0.079 inch)
Service Limit 1.5 mm (0.059 inch)
Valve Stem Tip Height 49.02 mm (1.929 inch)
Stem Diameter-Intake 7.960-7.975 mm (0.313-0.314 inch)
Stem Diameter-Exhaust 7.930-7.950 mm (0.312-0.3125 inch)
Stem-to-Guide Clearance-Intake 0.03-0.06 mm (0.001-0.002 inch)
Service Limit 0.10 mm (0.004 inch)
Stem-to-Guide Clearance-Exhaust 0.05-0.09 mm (0.0019-0.003 inch)
Service Limit 0.15 mm (0.006 mm)