PORSCHE RACING HISTORYGünther Klass (D)
1966 : Daytona 24 Hours - 2nd in class : Le Mans 24 Hours - 1st in class
6 February 1966 - Daytona 24 Hours - World Sports Car Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 17 | Porsche 904 GTS | 904-091 | S2.0 | Günther Klass (D)/Udo Schütz (D) | Porsche System Engineering (D) | 8th | 2nd | 26th | 610 laps |
19 June 1966 - Le Mans 24 Hours - World Sports Car Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 58 | Porsche 906 | 906-143 | S2.0 | Günther Klass (D)/Rolf Stommelen (D) | Porsche System Engineering (D) | 7th | 1st | 27th | 330 laps |