PORSCHE RACING HISTORYPorsche 917/10 - Chassis No. 917/10-002
25 July 1971 - Can-Am Watkins Glen - Can-Am - Canadian-American Challenge Cup
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 20 | Porsche 917/10 | 917/10-002 | Jo Siffert (CH) | Vasek Polak Racing | 3rd | 9th | 80 laps |
22 August 1971 - Can-Am Mid-Ohio - Can-Am - Canadian-American Challenge Cup
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 20 | Porsche 917/10 | 917/10-002 | Jo Siffert (CH) | STP Porsche Audi | 2nd | 4th | 78 laps |
29 August 1971 - Can-Am Road America - Can-Am - Canadian-American Challenge Cup
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 20 | Porsche 917/10 | 917/10-002 | Jo Siffert (CH) | STP Porsche Audi | 2nd | 6th | 49 laps |
12 September 1971 - Can-Am Donnybrooke - Can-Am - Canadian-American Challenge Cup
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 20 | Porsche 917/10 | 917/10-002 | Jo Siffert (CH) | STP Porsche Audi | 5th | 8th | 69 laps |
26 September 1971 - Can-Am Edmonton - Can-Am - Canadian-American Challenge Cup
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 20 | Porsche 917/10 | 917/10-002 | Jo Siffert (CH) | STP Porsche Audi | 4th | 7th | 78 laps |
17 October 1971 - Can-Am Laguna Seca - Can-Am - Canadian-American Challenge Cup
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 20 | Porsche 917/10 | 917/10-002 | Jo Siffert (CH) | STP Porsche Audi | 5th | 7th | 88 laps |
24 September 1972 - Interserie Nürburgring - Interserie
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 11 | Porsche 917/10 | 917/10-002 | INT | Willi Kauhsen (D) | Willi Kauhsen Racing Team (D) | DNF | 1st | 2 laps 1:Accident |