Class Descriptions
- Class A- Electric
- Class B- Antique, Brass, Veteran (through 1925)
- Class C- American Classic Open 1926-1933
- Class D- American Classic Open 1934-1942
- Class E- American Classic Closed 1926-1933
- Class F- American Classic Closed 1934-1942
- Class G- European Classic Open 1926-1933
- Class H- European Classic Open 1934-1942
- Class I- European Classic Closed 1926-1933
- Class J- European Classic Closed 1934-1942
- Class K- American Luxury Open 1946-1959
- Class L- American Luxury Closed 1946-1959
- Class M- European Luxury Open 1946-1959
- Class N- European Luxury Closed 1946-1959
- Class O- Sports Cars 1946-1959
- Class P- Pre- War Preservation