| Teams for 2004 OReilly 400K |
|---|
| Car | Team | Driver | Mfg |
|---|---|---|---|
| 0 | Richardson Motorsports | Loni Richardson |  |
| 1 | Ultra Motorsports | Ted Musgrave |  |
| 02 | Ed Sutton | Kelly Sutton | |
| 2 | Ultra Motorsports | Andy Houston | |
| 4 | Bobby Hamilton | Bobby Hamilton | |
| 6 | Kevin Harvick | Matt Crafton | |
| 07 | Green Light Racing | Shane Sieg | |
| 08 | Gene Christenson | Ken Weaver | |
| 8 | Ray Montgomery | Chase Montgomery | |
| 10 | Greg Pollex | Terry Cook |  |
| 12 | George Debidart | Robert Huffman |  |
| 13 | Duke Thorson | Lance Hooper | |
| 14 | Tom Mitchell | Rick Crawford | |
| 15 | Billy Ballew | Shane Hmiel | |
| 16 | Steve Coulter | Jack Sprague | |
| 17 | Darrell Waltrip | David Reutimann | |
| 18 | Bobby Hamilton | Chad Chaffin | |
| 20 | Ken Weaver | Johnny Chapman | |
| 21 | George Debidart | Hank Parker, Jr. | |
| 22 | Bill Davis | Bill Lester | |
| 23 | Bill Davis | Shelby Howard | |
| 24 | Alex Meshkin | Travis Kvapil | |
| 25 | Team Racing | Phil Bonifield | |
| 29 | Bob Keselowski | Brad Keselowski | |
| 38 | Daniel Whitt | Brandon Whitt | |
| 42 | Alex Meshkin | Mike Skinner | |
| 46 | Morgan-Dollar Motorsports | Dennis Setzer | |
| 48 | Ron Rhodes Racing | Greg Sacks | |
| 50 | Jack Roush | Jon Wood | |
| 62 | Orleans Racing | Steve Park | |
| 67 | Fiddleback Racing | David Ragan | |
| 75 | Wayne Spears | David Starr | |
| 88 | Duke Thorson | Tracy Hines | |
| 99 | Jack Roush | Carl Edwards | |
