Dimensional and Machining Specifications

All measurements given in inches, unless otherwise specified.

Stem Diameter
Intake 0.2756
Exhaust 0.3150

Clearance [01]
Installation Tolerance
New Intake -0.0394
Limit Exhaust -0.0748
Wear Limit
Intake -0.0591
Exhaust -0.0906

Face Angle Degrees 45


[01] Allowed depth of valve disk in relation to cylinder head mating face.