The bonnet conceals a world of remarkable devices and parts made of steel, aluminium, and other materials that engineers everywhere have been fine-tuning for more than a century. Thanks to modern electronic systems, vehicles today can do amazing things; their design has also made them much safer than the cars of the past. Yet the technical basis of internal combustion engine vehicles has not changed that much. They still rely on the same components, although these are admittedly more efficient and sophisticated year after year. Nearly everyone knows their names, but we rarely have the opportunity to admire their unusual and intricate shapes and their unique mechanical magic.