PORSCHE RACING HISTORYJohn Higgins (USA)
1985
23 March 1985 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 78 | Porsche 911 Carrera RSR | GTO | John Higgins (USA)/Chip Mead (USA)/James King (USA) | Tokina Zoom Lenses (USA) | 34th | 14th | 45th | 128 laps - Engine |
28 April 1985 - Riverside 600 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 78 | Porsche 911 | GTU | John Higgins (USA)/James King (USA) | 27th | 8th | 53rd | 94 laps |
5 October 1985 - Columbus IMSA GT - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 73 | Porsche 911 | GTO | John Higgins (USA) | John Higgins (USA) | 41st | 20th | 23rd | 5 laps - DNF |