It's an overhead valve engine with a single camshaft that uses push rods to open and close the 16 valves.

FORBES: The Engine That Could

As is usual in a wide variety of racing vehicles, horizontal damper struts are now used, which are operated via separate push rods and transfer levers.

ENGADGET: Visualized: Mercedes-Benz SLS AMG E-Cell bares all

To fill them, spring-loaded rods push high-volume drugs like ibuprofen from their tubes into a small nylon nest moving along the conveyor belt at the bottom of the machine.

FORBES: Drug Lord