4 mags, 4 carbs, 16 cylinders, designed by Bugatti, built by Duesenberg! Thank you Terry F for sharing!

The Bugatti U-16 was a 16-cylinder water-cooled double-8 vertical inline "U engine", designed by Ettore Bugatti in 1915 to 1916 and built in France in small numbers. 

The US Bolling Commission bought a license to build the engine in the US, and small numbers of a slightly revised version were built by the Duesenberg Motor Company as the King-Bugatti. Probably about 40 King-Bugattis were made before the end of World War I caused contracts to be canceled.