Close-up of a cylinder head intake port face with machined surfa…

Extreme close-up of the intake-port face of a bare cast-iron cylinder head, showing a freshly machined mating surface and rectangular ports with grinding marks inside the runner from port work. Bolt holes and a drain passage are visible; a red camera date stamp reads 2005 2 4.

AI caption February 2005 · Photo 40 of 187