Valve, Intake/Exhaust

DIMENSIONS
Face Angle (Intake and Exhaust)
Standard 45.0-45.5°
Service Limit 45.5-45.5°

Valve Tip Protrusion
Standard (New) 40.95-41.55 mm (1.612-1.636 inches)
Service Limit (Maximum) 41.60 mm (1.638 inches)

Outer Diameter
Intake Stem
Standard (New) 6.949-6.962 mm (0.2736-0.2741 inches)
Service Limit (Minimum) 6.935 mm (0.273 inches)
Exhaust Stem
Standard (New) 6.931-6.950 mm (0.2736-0.2740 inches)
Service Limit (Minimum) 6.915 mm (0.272 inches)

Total Length
Intake
Standard (New) 100.72-101.18 mm (3.9654-3.9835 inches)
Service Limit (Maximum) 100.64-101.26 mm (5.45-5.48 inches)
Exhaust
Standard (New) 100.02-101.48 mm (3.9378-3.9559 inches)
Service Limit (Maximum) 99.94-100.56 mm (5.45-5.48 inches)

Head Diameter
Intake
Standard (New) 32.16-32.46 mm (1.2661-1.2780 inches)
Exhaust
Standard (New) 27.30-27.60 mm (1.0748-1.0866 inches)

Margin Width
Intake
Service Limit (Minimum) 0.75 mm (0.035 inches)
Exhaust
Service Limit (Minimum) 0.75 mm (0.039 inches)