PORSCHE RACING HISTORYRalph Kent-Cooke (USA)
1981 : Sebring 12 Hours - 2nd overall : Le Mans 24 Hours - 2nd in class
21 March 1981 - Sebring 12 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 90 | Porsche 935 K3 | 930 770 0911 | GTX | Roy Woods (USA)/Ralph Kent-Cooke (USA)/Skeeter McKitterick (USA) | Cooke Woods/Garretson Enterprises (USA) | 2nd | 2nd | 10th | 242 laps |
26 April 1981 - Riverside 6 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 90 | Porsche 935 K3 | 930 770 0911 | GTX | Bob Garretson (USA)/Ralph Kent-Cooke (USA)/Roy Woods (USA) | Bob Garretson Enterprises (USA) | 4th | 4th | 13th | 190 laps |
14 June 1981 - Le Mans 24 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 42 | Porsche 935 K3 | 009 00030 | IMSA | Anny-Charlotte Verney (F)/Ralph Kent-Cooke (USA)/Bob Garretson (USA) | Cooke-Woods Racing (USA) | 6th | 2nd | 33rd | 328 laps |