Surface Variation

Engine Block
Deck Flatness [1]: 0.11 mm (0.004 inches)
Deck Flatness [2]: 0.22 mm (0.008 inches)

Manifold Deck Flatness
Exhaust: 0.22 mm (0.008 inches)
Intake: 0.22 mm (0.008 inches)

[1] Measured within a 152.4 mm (6.0 inches) area.
[2] Measuring the Overall Length of the Cylinder Head.