PORSCHE RACING HISTORYSteve Durst (USA)
1973
10 June 1973 - Can-Am Mosport - Can-Am - Canadian-American Challenge Cup
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 3 | Porsche 917/10 | 917-028 | Steve Durst (USA) | Vasek Polak Racing | 5th | 14th | 77 laps |
8 July 1973 - Can-Am Road Atlanta - Can-Am - Canadian-American Challenge Cup
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 3 | Porsche 917/10 | 917-028 | Steve Durst (USA) | Vasek Polak Racing | 7th | 15th | 83 laps |
22 July 1973 - Can-Am Watkins Glen - Can-Am - Canadian-American Challenge Cup
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 3 | Porsche 917/10 | 917-028 | Steve Durst (USA) | Vasek Polak Racing | 7th | 17th | 55 laps |
12 August 1973 - Can-Am Mid-Ohio - Can-Am - Canadian-American Challenge Cup
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 3 | Porsche 917/10 | 917-028 | Steve Durst (USA) | Vasek Polak Racing | 10th | 19th | 77 laps |