PORSCHE RACING HISTORY1973 - Zeltweg 1000 km
24 June 1973 - Österreichring, Zeltweg, Austria
Gijs van Lennep & Herbert Müller 8th in Porsche Carrera RSR 21 laps behind the winning Matra MS670B driven by Henri Pescarolo and Gérard Larrousse
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 911 Carrera RSR | 911 360 0588 R6 | S3.0 | Gijs van Lennep (NL)/Herbert Müller (CH) | Martini Racing Porsche AG (D) | 8th | 8th | 10th | 149 laps |
| 8 | Porsche 911 Carrera RSR | 911 360 0686 R7 | S3.0 | Helmuth Koinigg (A)/Manfred Schurti (FL) | Martini Racing Porsche AG (D) | 9th | 9th | 12th | 148 laps |
World Championship for Makes
Previous 1973 - Euro GT Nivelles Next 1973 - Interserie Norisring