Manufacturers build purpose built Formula 1000 cars as a rolling chassis or provide kits for converting F2000 cars into F1000 .
With more than 13 manufacturers Formula 1000 boast more manufacturers than other open - wheel formula class in the world .
Manufacturers build purpose built Formula 1000 cars as a rolling chassis or provide kits for converting F2000 cars into Formula 1000 .
With more than 13 manufacturers Formula 1000 boast more manufacturers than other open - wheel formula class in the world .