Harry Miller designed and developed the most innovative and winning competition cars during The Golden Age of racing, the 1920s. His masterpiece was the 91 ci supercharged twin cam straight eight seen here. Miller, along with Duesenberg, dominated oval track racing including Indy and "the boards" running at engine speeds exceeding 9000 rpm on skinny tires, lousy brakes, and nothing more than cloth helmets for their noble drivers.