PORSCHE RACING HISTORYPorsche 911 Carrera RSR - Chassis No. 911 460 0124
One of 15 RSRs specially built for Roger Penske’s IROC Series 1973 - Roger Penske aquired new from Porsche
27 October 1973 - IROC Riverside 2 - IROC - International Race of Champions
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 4 | Porsche 911 Carrera RSR | 911 460 0124 | George Follmer (USA) | Roger Penske (USA) | 1st | 9th | 30 laps |
28 October 1973 - IROC Riverside 3 - IROC - International Race of Champions
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 12 | Porsche 911 Carrera RSR | 911 460 0124 | Mark Donohue (USA) | Roger Penske (USA) | 1st | 1st | 30 laps |