PORSCHE RACING HISTORYKlaus Drees (D)
1975
1 June 1975 - Nürburgring 1000 Km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 67 | Porsche 911 Carrera RSR | GT+1.6 | Wolfgang Kauwertz (D)/Klaus Drees (D) | Neußer Motorsportclub e.V. im ADAC (D) | DNF | 49th | 16 laps - DNF |
19 October 1975 - Zolder [GT/T+2.0] - Non Championship Race
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 911 Carrera | T/GT+2.0 | Klaus Drees (D) | Neußer Motorsportclub e. V. im ADAC (D) | 8th | 8th |