PORSCHE RACING HISTORYWilli Kauhsen (D)
1973 : Vallelunga 6 Hours - 1st in class : Interserie Nürburgring - 1st overall : Interserie Norisring - 3rd in class
25 March 1973 - Vallelunga 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 911 Carrera RSR | 911 360 0588 R6 | GT | George Follmer (USA)/Willi Kauhsen (D) | Martini Racing Team (D) | 7th | 1st | 21st | 251 laps |
1 April 1973 - Interserie Nürburgring - Interserie
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 2 | Porsche 917/10 TC | 917/10-015 | INT | Willi Kauhsen (D) | Willi Kauhsen Racing Team (D) | 1st | 1st | 1st | 14 laps |
27 May 1973 - Nürburgring 1000 km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 66 | Porsche 911 Carrera RSR | 911 360 0576 R5 | GT+1.6 | George Follmer (USA)/Willi Kauhsen (D) | Martini Racing/Porsche AG (D) | DNF | 16th | 6 laps - Engine |
24 June 1973 - Interserie Norisring - Interserie
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 2 | Porsche 917/10 TC | 917/10-015 | Gr. 7 | Willi Kauhsen (D) | Willi Kauhsen Racing Team (D) | 4th | 3rd | 1st | 136 laps |
12 August 1973 - Can-Am Mid-Ohio - Can-Am - Canadian-American Challenge Cup
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 5 | Porsche 917/10 TC | 917/10-015 | Willi Kauhsen (D) | Willi Kauhsen Racing Team | DNF | 5th | 9 laps - Gearbox |