American Iron racing features domestic muscle or pony cars such as Ford Mustang, Chevrolet Camaro, and Pontiac Firebird in four classes, Camaro Mustang Challenge (CMC & CMC-II), American Iron (AI), and American Iron Extreme (AIX).
CMC, CMC-II, and AI classes have a power to weight limitation, while AIX is unrestricted.
The minimum weight for an American Iron race car is 2,700 pounds with driver included.
These formulas are designed to allow differences in vehicle handling and power while equalizing the competition and keeping race team budgets low by penalizing excessive power.
American Iron races are run at all NASA regional events, as well as the annual National Championships currently held each year in September at Miller Motorsports Park in Tooele, Utah.