General Specifications

Bore Diameter (Bearing Counterbore Diameter)
Intake
Maximum 47.097 mm (1.8542 inch)
Minimum 47.072 mm (1.8532 inch)
Exhaust
Maximum 39.739 mm (1.5645 inch)
Cylinder Head Gasket Surface
Flatness [1] 0.018 mm (0.007 inch)
Resurface, Maximum 0.254 mm (0.010 inch)

[1] Over the entire cylinder head gasket surface.