PORSCHE RACING HISTORYPorsche 935/77A - Chassis No. 930 890 0025
30 April 1978 - Laguna Seca 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 16 | Porsche 935/77A | 930 890 0025 | GTX | George Follmer (USA) | Vasek Polak (USA) | 1st | 1st | 2nd | 52 laps |
22 April 1979 - Riverside 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 16 | Porsche 935/77A | 930 890 0025 | GTX | George Follmer (USA)/Brett Lunger (USA)/Derek Bell (GB) | Vasek Polak (USA) | 3rd | 3rd | 45th | 189 laps |