Valve Seat

Angle-Intake and Exhaust 44°-44.5°
Contact Width 0.9-1.3 mm (0.035-0.051 inch)
Sinkage-Service Limit 0.2 mm (0.078 inch)
Guide Bore Diameter (STD.) 7.95-7.98 mm (0.313-0.314 inch)