How the Duesenberg brothers redefined the great American automobile

The enormous engine groaningly turned its 350-pound crankshaft through 12 pints of 50-weight oil.

Fred Duesenberg's engines are evidence of his dedication to engineering.

The straight-eight powers the live rear axle through a torque tube and three-speed non-synchro gearbox.

There are 32 tappets hiding out there, out of sight, under shiny metal coverings.

Duesenberg roared into view. Some adored the showoff automobile.

The Duesenbergs were die-hard race fans who kept making engines and chassis for the Indianapolis 500.

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