PORSCHE RACING HISTORYStephen Behr (USA)
1973 : Sebring 12 Hours - 1st in class
4 February 1973 - Daytona 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 43 | Porsche 911 S | 911 230 0921 | GT+2.0 | Dave Helmick (USA)/John O'Steen (USA)/Stephen Behr (USA) | Dave Helmick (USA) | 11th | 8th | 31st | 558 laps |
24 March 1973 - Sebring 12 Hours - Non Championship Race
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 27 | Porsche 911 S | GTU | Don Lindley (USA)/Stephen Behr (USA)/Brian Goellnicht (USA) | Don Lindley | 7th | 1st | 44th | 209 laps |