| Teams 2004 O'Reilly Auto Parts 300 |
|---|
| No. | Team | Driver | Mfg |
|---|---|---|---|
| 00 | Haas CNC Racing | Jason Leffler | Chevrolet |
| 1 | Phoenix Racing | Johnny Benson, Jr. | Dodge |
| 2 | Richard Childress Racing | Ron Hornaday, Jr. | Chevrolet |
| 2 | Bryant Stith | Hermie Sadler | Chevrolet |
| 4 | Biagi DenBeste Racing | Mike Wallace | Ford |
| 5 | Hendrick Motorsports | Kyle Busch | Chevrolet |
| 6 | Tommy Baldwin Racing | Tracy Hines | Dodge |
| 8 | Chance 2 Motorsports | Martin Truex, Jr. | Chevrolet |
| 9 | Roush Racing | Jeff Burton | Ford |
| 10 | JD Motorsports | Jason Schuler | Chevrolet |
| 12 | FitzBradshaw Racing | Tim Fedewa | Chevrolet |
| 14 | FitzBradshaw Racing | Casey Atwood | Chevrolet |
| 17 | Reiser Enterprises | Matt Kenseth | Ford |
| 18 | Joe Gibbs Racing | J.J. Yeley | Chevrolet |
| 20 | Joe Gibbs Racing | Mike Bliss | Chevrolet |
| 21 | Richard Childress Racing | Clint Bowyer | Chevrolet |
| 22 | ppc Racing | Jason Keller | Ford |
| 23 | Bill Davis Racing | Kenny Wallace | Chevrolet |
| 25 | Team Rensi Motorsports | Bobby Hamilton, Jr. | Ford |
| 27 | Brewco Motorsports | Johnny Sauter | Pontiac |
| 29 | Richard Childress Racing | Bobby Labonte | Chevrolet |
| 31 | Ted Marsh | Dave Blaney | Ford |
| 33 | Andy Petree Racing | Paul Menard | Chevrolet |
| 37 | Brewco Motorsports | David Green | Pontiac |
| 38 | Akins Motorsports | Kasey Kahne | Dodge |
| 44 | Labonte Motorsports | Justin Labonte | Dodge |
| 46 | Lewis Motorsports | Ashton Lewis | Chevrolet |
| 47 | Frank Schwantz | Robert Pressley | Ford |
| 49 | Jay Robinson Racing | Derrike Cope | Ford |
| 50 | Holigan Racing | David Starr | Chevrolet |
| 55 | Robby Gordon Motorsports | Robby Gordon | Chevrolet |
| 59 | Frank Schwantz | Stacy Compton | Ford |
| 60 | Roush Racing | Greg Biffle | Ford |
| 66 | Rusty Wallace Racing | Billy Parker | Dodge |
| 72 | MacDonald Motorsports | Lance Hooper | Chevrolet |
| 74 | BACE Motorsports | Tony Raines | Chevrolet |
| 82 | FitzBradshaw Racing | Randy LaJoie | Chevrolet |
| 87 | NEMCO Motorsports | Joe Nemechek | Chevrolet |
| 88 | NEMCO Motorsports | Jeff Fuller | Chevrolet |
| 91 | Stanton Barrett Motorsports | Stanton Barrett | Chevrolet |
| 96 | Ortec Racing | Gus Wasson | Chevrolet |
| 99 | Michael Waltrip Racing | Michael Waltrip | Chevrolet |
| 127 | Braun Motorsports | David Stremme | Dodge |