2005 Season
| 19-Mar | 12 Hours of Sebring |
| 17-Apr | Road Atlanta |
| 22-May | Mid Ohio |
| 4-Jul | Lime Rock |
| 17-Jul | Sonoma |
| 30-Jul | Portland |
| 21-Aug | Road America |
| 4-Sep | Mosport |
| 1-Oct | Road Atlanta |
| 16-Oct | Laguna Seca |
Championship Standings
| Frank Biela | 182 |
| Emanuele Pirro | 182 |
| Chris Dyson | 154 |
| JJ Lehto | 148 |
| Marco Werner | 148 |
| Andy Wallace | 135 |
| Butch Leitzinger | 124 |
| James Weaver | 124 |
| Michael Lewis | 45 |
| Bryan Willman | 45 |
| Guy Smith | 38 |
| Tom Chilton | 33 |
| Hayanari Shimoda | 33 |
| Tom Kristensen | 26 |
| Allan McNish | 22 |
Race Winners
| Frank Biela | 4 |
| Emanuele Pirro | 4 |
| JJ Lehto | 3 |
| Marco Werner | 3 |
| Butch Leitzinger | 2 |
| James Weaver | 2 |
| Tom Chilton | 1 |
| Tom Kristensen | 1 |
| Hayanari Shimoda | 1 |
Pole Positions
| No Data |
