PORSCHE RACING HISTORYRoberto Quintanilla (MEX)
1976 : Sebring 12 Hours - 3rd overall
20 March 1976 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 30 | Porsche 911 Carrera RSR | 911 460 9113 | GTO | Roberto Quintanilla (MEX)/Roberto Gonzalez (MEX) | John McClelland | 3rd | 3rd | 14th | 227 laps |
2 May 1976 - Laguna Seca 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 31 | Porsche 911 Carrera RSR | GTO | Roberto Quintanilla (MEX) | Roberto Quintanilla | 40th | 26th | 34th | 1 lap - DNF |