Valve Seat

Refacing Angle
Intake 30°, 45°, 75°
Exhaust 45°, 75°
Contacting Angle 45°
Contacting Width
Intake 1.2 - 1.6 mm (0.047 - 0.063 inch)
Exhaust 1.0 - 1.4 mm (0.039 - 0.055 inch)