Valve, Intake/Exhaust

Valve Seat
Angle 44.25° - 44.75°
Runout (Max.) 0.0762 mm (0.003 inch)
Width (Finish) - Intake 1.016 - 1.524 mm (0.040 - 0.060 inch)
Width (Finish) - Exhaust 1.524 - 2.032 mm (0.060 - 0.080 inch)
Lift @ Zero Lash - Intake 10.414 mm (0.410 inch)
Lift @ Zero Lash - Exhaust 10.592 mm (0.417 inch)
Stem Diameter - Intake 9.449 - 9.474 mm (0.372 - 0.373 inch)
Stem Diameter - Exhaust 9.432 - 9.449 mm (0.371 - 0.372 inch)
Guide Bore 9.500 - 9.525 mm (0.374 - 0.375 inch)
Stem to Guide Clearance - Intake 0.0254 - 0.0762 mm (0.001 - 0.003 inch)
Stem to Guide Clearance - Exhaust 0.0508 - 0.1016 mm (0.002 - 0.004 inch)
Service Limit 0.4318 mm (0.017 inch)

Valves
Face Angle 43.25° - 43.75°
Head Diameter - Intake 47.752 mm (1.88 inch)
Head Diameter - Exhaust 41.072 mm (1.617 inch)
Length (Overall) - Intake 126.21 - 126.85 mm (4.969 - 4.994 inch)
Length (Overall) - Exhaust 126.44 - 127.30 mm (4.978 - 5.012 inch)

Valve Springs
Free Length 49.962 mm (1.967 inch)
Spring Tension - Valve Closed 378 N @ 41.66 mm (85 lbs. @ 1.64 inch)
Spring Tension - Valve Open 890 N @ 30.89 mm (200 lbs. @ 1.212 inch)
Number of Coils 6.8
Installed Height 41.66 mm (1.64 inch)
Wire Diameter 4.50 mm (0.177 inch)