PORSCHE RACING HISTORYPorsche 911 Carrera RSR - Chassis No. 911 460 9057
13 July 1974 - Watkins Glen 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 95 | Porsche 911 Carrera RSR | 911 460 9057 | TA | Skip Barber (USA)/Bob Hagestad (USA) | Robert Hagestad (USA) | DNF | 12th | 129 laps - Rear Suspension |
1 February 1976 - Daytona 24 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 56 | Porsche 911 Carrera RSR | 911 460 9057 | GTO | Bob Hagestad (USA)/Jerry Jolly (USA) | Bob Hagestad (USA) | 4th | 4th | 15th | 510 laps |
20 March 1976 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 56 | Porsche 911 Carrera RSR | 911 460 9057 | GTO | Bob Hagestad (USA)/Jerry Jolly (USA) | Spirit of Colorado/Hagestad Porsche (USA) | 4th | 4th | 10th | 224 laps |
10 July 1976 - Watkins Glen 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 56 | Porsche 911 Carrera RSR | 911 460 9057 | TA-II | Bob Hagestad (USA)/Jerry Jolly (USA) | Bob Hagestad (USA) | 9th | 5th | 10th | 157 laps |
3 October 1976 - Laguna Seca 100 Miles II - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 56 | Porsche 911 Carrera RSR | 911 460 9057 | GTO | Bob Hagestad (USA) | Bob Hagestad (USA) | 33rd | 26th | 11th | 24 laps - DNF |
26 June 1977 - Trans-Am Nelson Ledges - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 18 | Porsche 911 Carrera RSR | 911 460 9057 | TA-II | Eitel Maier (CDN) | Heimrath Racing (CDN) | 10th | 6th | 25th | 47 laps |
20 August 1977 - Mosport 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 18 | Porsche 911 Carrera RSR | 911 460 9057 | TA-II | Eitel Maier (CDN)/Jerry Jolly (USA) | Eitel Maier (CDN) | 10th | 6th | 22nd | 200 laps |