Valve Seat

NOTE: Specifications are for intake and exhaust unless noted.

Angle 44.75°
Contact Width
Intake 1.1-1.4 mm (0.043-0.055 inch)
Exhaust 1.4-1.7 mm (0.055-0.066 inch)
Narrowing Angle
Top 60°
Bottom 30°
Runout, Maximum 0.04 mm (0.001 inch)