Gallery

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  A cylinder head sliced in half showing the intake and exhaust valves, intake and exhaust ports, coolant passages, cams, tappets and valve springs.
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  A single overhead camshaft (SOHC) cylinder head from a Honda D15A3.
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  A double overhead camshaft (DOHC) cylinder head from a Honda K20Z3.
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  The bottom (left) and top (right) of a Malossi cylinder head for single-cylinder, two-stroke scooters. Hole in the middle for the spark plug, four holes for the cylinder bolt posts.
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  Overhead view of an air cooled cylinder head from a Suzuki GS550 showing dual camshafts, drive sprockets and cooling fins.
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  The cylinder head from a GMC van. The valves and part of the exhaust manifold are visible.