PORSCHE RACING HISTORYGuido Fossati (I)
1973 : Targa Florio - 3rd in class
13 May 1973 - Targa Florio - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 109 | Porsche 911 S | GT+2.0 | Guido Fossati (I)/Angelo Mola (I) | Guido Fossati | 14th | 3rd | 23rd | 10 laps |
2 June 1973 - European GT Championship Imola - European Championship for Grand Touring Cars
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 95 | Porsche 911 Carrera | GT3.0 | Guido Fossati (I) | 15th | 10th | 36 laps |