The 2003 Michigan 100 was Round 7 of the 2003 IRL Infiniti Pro Series. The event was held at Michigan International Speedway in Michigan, United States on 27 July 2003. Mark Taylor was the race winner.
Michigan 100 Race Result
| Pos. | No. | Driver | Chassis | Engine | Tire | Laps | Laps Led | Status | Started | Points |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 4 | Mark Taylor | Dallara | Infiniti | Firestone | 50 | 31 | Running | 7 | 52 |
| 2 | 20 | Jeff Simmons | Dallara | Infiniti | Firestone | 50 | 0 | Running | 3 | 40 |
| 3 | 36 | Thiago Medeiros | Dallara | Infiniti | Firestone | 50 | 0 | Running | 5 | 35 |
| 4 | 91 | Aaron Fike | Dallara | Infiniti | Firestone | 50 | 0 | Running | 10 | 32 |
| 5 | 9 | Tom Wood | Dallara | Infiniti | Firestone | 50 | 0 | Running | 13 | 30 |
| 6 | 33 | Marty Roth | Dallara | Infiniti | Firestone | 50 | 0 | Running | 14 | 28 |
| 7 | 14 | Ed Carpenter | Dallara | Infiniti | Firestone | 50 | 0 | Running | 2 | 26 |
| 8 | 25 | G.J. Mennen | Dallara | Infiniti | Firestone | 50 | 0 | Running | 16 | 24 |
| 9 | 27 | Gary Peterson | Dallara | Infiniti | Firestone | 49 | 0 | Running | 12 | 22 |
| DNF | 24 | Paul Dana | Dallara | Infiniti | Firestone | 40 | 0 | Accident | 9 | 20 |
| DNF | 5 | Arie Luyendyk Jr. | Dallara | Infiniti | Firestone | 40 | 19 | Accident | 1 | 19 |
| DNF | 99 | Brandon Erwin | Dallara | Infiniti | Firestone | 6 | 0 | Accident | 11 | 18 |
| DNF | 6 | Ross Fonferko | Dallara | Infiniti | Firestone | 6 | 0 | Accident | 4 | 17 |
| DNF | 3 | Jonathan Urlin | Dallara | Infiniti | Firestone | 6 | 0 | Accident | 8 | 16 |
| DNF | 92 | Cory Witherill | Dallara | Infiniti | Firestone | 6 | 0 | Accident | 6 | 15 |
| DNF | 12 | Matt Beardsley | Dallara | Infiniti | Firestone | 6 | 0 | Accident | 15 | 14 |