PORSCHE RACING HISTORYHerbert Müller (CH)
1973 : Vallelunga 6 Hours - 2nd in class : Dijon 1000 km - 1st in class : Targa Florio - 1st overall : Kyalami 9 Hours - 1st overall
25 March 1973 - Vallelunga 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 8 | Porsche 911 Carrera RSR | 911 360 0576 R5 | GT | Gijs van Lennep (NL)/Herbert Müller (CH) | Martini Racing Team (D) | 8th | 2nd | 15th | 251 laps |
15 April 1973 - Dijon 1000 km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 26 | Porsche 911 Carrera RSR | 911 360 0576 R5 | GT | Herbert Müller (CH)/Gijs van Lennep (NL) | Martini Racing Team (D) | 9th | 1st | 15th | 266 laps |
25 April 1973 - Monza 1000 km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 81 | Porsche 911 Carrera RSR | 911 360 0588 R6 | GT3.0 | Gijs van Lennep (NL)/Herbert Müller (CH) | Martini Racing Team (D) | DNF | 34th | 62 laps - Engine |
6 May 1973 - Spa 1000 km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 41 | Porsche 911 Carrera RSR | 911 360 0588 R6 | S3.0 | Gijs van Lennep (NL)/Herbert Müller (CH) | Porsche Stuttgart (D) | 5th | 5th | 13th | 63 laps |
13 May 1973 - Targa Florio - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 8 | Porsche 911 Carrera RSR | 911 360 0588 R6 | S3.0 | Herbert Müller (CH)/Gijs van Lennep (NL) | Martini Racing | 1st | 1st | 5th | 11 laps - 6:54:20 |
27 May 1973 - Nürburgring 1000 km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 911 Carrera RSR | 911 360 0686 R7 | S3.0 | Gijs van Lennep (NL)/Herbert Müller (CH) | Martini Racing/Porsche AG (D) | 5th | 4th | 15th | 40 laps |
10 June 1973 - Le Mans 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 46 | Porsche 911 Carrera RSR | 911 360 0686 R7 | S3.0 | Gijs van Lennep (NL)/Herbert Müller (CH) | Martini Racing Team (D) | 4th | 4th | 18th | 329 laps |
24 June 1973 - Zeltweg 1000 km - World Championship for Makes
| 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 |
3 November 1973 - Kyalami 9 Hours - South African Springbok Trophy Series
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 1 | Porsche 908/03 | 908/03-008 | Gr.5 | Reinhold Jöst (D)/Herbert Müller (CH) | R. Jost Racing (D) | 1st | 1st | 5th | 360 laps |