The 6C 2300 B Mille Miglia was presented in 1938 and only produced that year. This was the last of the extensive series of 2300 B. It was the chassis of the 6C 2300 Pescara increased by 10 CV and almost 30 kilometres in speed thus reaching the maximum speed of 170 kph. Carrozzeria Touring of Milan patented the superleggera design using ultralight alloys and components with aluminum panels over a cage-like steel frame. One of this model took first place in the Turismo class of the 1937 Mille Miglia and 4th overall.