PORSCHE RACING HISTORYBobby Hefner (USA)
1986 : Sebring 12 Hours - 3rd in class
22 March 1986 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 35 | Porsche 911 Carrera RSR | 911 460 9113 | GTU | Jack Griffin (USA)/Bobby Hefner (USA)/Skip Winfree (USA) | Team Dallas | 14th | 3rd | 65th | 225 laps - Gearbox |