PORSCHE RACING HISTORYKlaus Utz (D)
1977 : Mugello 6 Hours - 3rd in class
13 March 1977 - DRM Zolder Bergischer Löwe - DRM - Deutsche Rennsport Meisterschaft
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 66 | Porsche 911 Carrera RSR | Gr.4 | Klaus Utz (D) | Hahn Sportwagen (D) | 9th | 9th | 10th | 22 laps |
20 March 1977 - Mugello 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 38 | Porsche 911 Carrera RSR | GT | Klaus Utz (D)/Rolf Blind (D) | Hahn Sportwagen (D) | 6th | 3rd | 10th | 145 laps |
27 March 1977 - DRM Nürburgring 300 Km - DRM - Deutsche Rennsport Meisterschaft
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 70 | Porsche 911 Carrera RSR | Div. I | Klaus Utz (D) | Hahn Sportwagen GmbH (D) | DNF | 11th | 0 laps |
3 July 1977 - DRM Norisring - DRM - Deutsche Rennsport Meisterschaft
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 72 | Porsche 934/5 | Div.I | Klaus Utz (D) | Hahn Sportwagen GmbH (D) | DNF | 10th | 37 laps |