For the 1923 season, the American Automobile Association (AAA) introduced a new Grand Prix-inspired formula, limiting engine displacement to two liters (122 cubic inches).

Harry A.

Miller & Co.

responded with what would become one of the most influential racing car designs in history: The Miller 122.

Compact, exquisitely engineered, and devastatingly effective, the 122 marked the first true series-built American racing car.

Each car required more than 2,000 individual components, all designed and manufactured in-house at Miller’s Los Angeles works.

The result was a remarkably light, rigid, and powerful single-seater that would dominate board tracks, dirt ovals, and championship racing throughout the 1920s, setting records that, in some cases, stood for decades.


By early 1924, Tommy Milton was among the best-known drivers in American motor racing.

A fearless speedway star with national renown, Milton had already etched his name into history.

In April 1920, he set the American ...