PORSCHE RACING HISTORYEmerson Fittipaldi (BR)
1973 : IROC Riverside 2 - 3rd : IROC Riverside 3 - 3rd
27 October 1973 - IROC Riverside 1 - IROC - International Race of Champions
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 1 | Porsche 911 Carrera RSR | 911 460 0100 | Emerson Fittipaldi (BR) | Roger Penske (USA) | 12th | 11th | 9 laps - Accident |
27 October 1973 - IROC Riverside 2 - IROC - International Race of Champions
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 12 | Porsche 911 Carrera RSR | 911 460 0025 | Emerson Fittipaldi (BR) | Roger Penske (USA) | 3rd | 1st | 30 laps |
28 October 1973 - IROC Riverside 3 - IROC - International Race of Champions
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 3 | Porsche 911 Carrera RSR | 911 460 0050 | Emerson Fittipaldi (BR) | Roger Penske (USA) | 3rd | 10th | 30 laps |