PORSCHE RACING HISTORYPorsche 917 K - Chassis No. 917-025
5 July 1970 - Interserie Hockenheim Südwestpokal - Interserie
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 30 | Porsche 917 K | 917-025 | Dominique Martin (CH) | Zitro Racing Cars (F) | 11th | 13th | 29 laps |
10 January 1971 - Buenos Aires 1000 km - International Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 34 | Porsche 917 K | 917-025 | S | Dominique Martin (CH)/Pablo Bréa (RA) | Zitro Racing | 10th | 7th | 18th | 145 laps |
18 April 1971 - Le Mans Test - Non Championship Race
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 57 | Porsche 917 K | 917-025 | S5.0 | Dominique Martin (CH) | Zitro Racing Team/D. Martin | 9th | 7th |
25 April 1971 - Monza 1000 km - International Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 5 | Porsche 917 K | 917-025 | S5.0 | Gérard Pillon (CH)/Dominique Martin (CH) | Zitro Racing Cars | 9th | 6th | 15th | 154 laps |
9 May 1971 - Spa 1000 km - International Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 24 | Porsche 917 K | 917-025 | S5.0 | Dominique Martin (CH)/Gérard Pillon (CH) | Zitro Racing | DNF | 11th | 31 laps - Pincture/Accident |
13 June 1971 - Le Mans 24 Hours - International Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 57 | Porsche 917 K | 917-025 | S5.0 | Dominique Martin (CH)/Gérard Pillon (CH) | Zitro Racing Team (CH) | DNF | 18th | 228 laps - Gearbox |