Rebuilt aluminum DOHC cylinder head on workbench showing valves…

A bare aluminum DOHC cylinder head sitting upside-down on a workbench, showing the combustion-chamber face with valves installed and threaded studs protruding, plus the intake ports on the upper side. The casting appears freshly cleaned or rebuilt, set on a dark metal table in a shop.

AI caption January 2006 · Photo 10 of 12