1991 / Non-Championship Races / Drivers
Gernot Sirrenburg 1
Rudi Seher Motorsport
| Germany | |
Pedro Lamy 1
WTS Racing
P FL
| March 20, 1972 | |
| Aldeia Galega | |
| Portugal | |
Johnny Hauser 2
WTS Racing
| August 16, 1971 | |
| Cugy | |
| Switzerland | |
Pedro Lamy 3
WTS Racing
P FL
| March 20, 1972 | |
| Aldeia Galega | |
| Portugal | |
Claude Bourbonnais 4
Champ Racing
| December 1, 1966 | |
| Ile Perrot | |
| Canada | |
Trevor Seibert 4
Pierre Phillips
P
| March 4, 1967 | |
| Canada | |
Roger Studhalter 4
Private entry
| May 8, 1966 | |
| Switzerland | |
Ric Peterson 5
Pierre Phillips
| United States | |
Roger Studhalter 7
Private entry
| May 8, 1966 | |
| Switzerland | |
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