Allstate 400 at the Brickyard (Cup) entry list -
| Car | Driver | Hometown | Make | Sponsor | Owner |
| 0 | Mike Bliss | Milwaukie, OR | Chevrolet | NetZero Best Buy | Gene Haas |
| 1 | Martin Truex Jr.** | Mayetta, NJ | Chevrolet | Bass Pro Shops/Tracker | Teresa Earnhardt |
| 01 | Joe Nemechek | Lakeland, FL | Chevrolet | U.S. Army | Nelson Bowers |
| 2 | Rusty Wallace | St. Louis, MO | Dodge | Miller Lite | Roger Penske |
| 4 | Mike Wallace** | St. Louis, MO | Chevrolet | Lucas Oil Products | Larry McClure |
| 5 | Kyle Busch* | Las Vegas, NV | Chevrolet | Kellogg's/Delphi | Rick Hendrick |
| 6 | Mark Martin | Batesville, AR | Ford | Viagra | Jack Roush |
| 7 | Robby Gordon** | Orange, CA | Chevrolet | Fruit of the Loom | James Smith |
| 07 | Dave Blaney | Hartford, OH | Chevrolet | Jack Daniel's | Richard Childress |
| 8 | Dale Earnhardt Jr. | Kannapolis, NC | Chevrolet | Budweiser | Teresa Earnhardt |
| 9 | Kasey Kahne | Enumclaw, WA | Dodge | Dodge Dealers/UAW | Ray Evernham |
| 10 | Scott Riggs | Bahama, NC | Chevrolet | Checkers/Rally's | James Rocco |
| 11 | Jason Leffler | Long Beach, CA | Chevrolet | FedEx Express | J D Gibbs |
| 12 | Ryan Newman | South Bend, IN | Dodge | ALLTEL | Roger Penske |
| 15 | Michael Waltrip | Owensboro, KY | Chevrolet | NAPA Auto Parts | Teresa Earnhardt |
| 16 | Greg Biffle | Vancouver, WA | Ford | National Guard | Geoff Smith |
| 17 | Matt Kenseth | Cambridge, WI | Ford | DeWalt Power Tools | Mark Martin |
| 18 | Bobby Labonte | Corpus Christi, TX | Chevrolet | Interstate Batteries | Joe Gibbs |
| 19 | Jeremy Mayfield | Owensboro, KY | Dodge | Dodge Dealers/UAW | Ray Evernham |
| 20 | Tony Stewart | Rushville, IN | Chevrolet | The Home Depot | Joe Gibbs |
| 21 | Ricky Rudd | Chesapeake, VA | Ford | Motorcraft Genuine Parts | Glen Wood |
| 22 | Scott Wimmer | Wausau, WI | Dodge | Caterpillar | Bill Davis |
| 23 | Mike Skinner** | Susanville, CA | Dodge | History Channel AutoManiac | Gail Davis |
| 24 | Jeff Gordon | Pittsboro, IN | Chevrolet | DuPont | Rick Hendrick |
| 25 | Brian Vickers | Thomasville, NC | Chevrolet | Garnier Fructis | Mary Hendrick |
| 29 | Kevin Harvick | Bakersfield, CA | Chevrolet | GM Goodwrench | Richard Childress |
| 31 | Jeff Burton | South Boston, VA | Chevrolet | Bass Pro Shops/Cingular | Richard Childress |
| 32 | Bobby Hamilton Jr.** | Nashville, TN | Chevrolet | Tide | Calvin Wells, III |
| 34 | P.J. Jones** | Torrance, CA | Chevrolet | PEO Pros | William Edwards |
| 37 | Kevin Lepage** | Shelburne, VT | Dodge | Patron Tequila | John Carter |
| 38 | Elliott Sadler | Emporia, VA | Ford | M&M's | Robert Yates |
| 40 | Sterling Marlin | Columbia, TN | Dodge | Coors Light | Felix Sabates |
| 41 | Casey Mears | Bakersfield, CA | Dodge | Target | Chip Ganassi |
| 42 | Jamie McMurray | Joplin, MO | Dodge | Texaco Havoline | Floyd Ganassi |
| 43 | Jeff Green | Owensboro, KY | Dodge | Boxtops for Education/Cheerios/Betty Crocker | Richard L Petty |
| 44 | Terry Labonte** | Corpus Christi, TX | Chevrolet | ditech.com | Rick Hendrick |
| 45 | Kyle Petty | Randleman, NC | Dodge | Georgia-Pacific/Marsh Stores | Kyle Petty |
| 48 | Jimmie Johnson | El Cajon, CA | Chevrolet | Lowe's | Jeff Gordon |
| 49 | Ken Schrader | Fenton, MO | Dodge | Schwan's Home Service | Elizabeth Morgenthau |
| 50 | Jimmy Spencer** | Berwick, PA | Dodge | Arnold Development Companies | Don Arnold |
| 66 | Mike Garvey*/** | Lakeville, MN | Ford | EAS | Jeff Stec |
| 77 | Travis Kvapil* | Janesville, WI | Dodge | Kodak/Jasper Engines | Douglas Bawel |
| 88 | Dale Jarrett | Hickory, NC | Ford | UPS | Robert Yates |
| 89 | Morgan Shepherd** | Conover, NC | Dodge | Victory In Jesus | Cindy Shepherd |
| 91 | Bill Elliott** | Dawsonville, GA | Dodge | Stanley Tools | Ray Evernham Sr. |
| 97 | Kurt Busch | Las Vegas, NV | Ford | Crown Royal | Georgetta Roush |
| 99 | Carl Edwards | Columbia, MO | Ford | AAA | Jack Roush |
| 100 | Kenny Wallace** | St. Louis, MO | Chevrolet | Aaron's | Buffy Waltrip |
| 104 | Bobby Hamilton** | Nashville, TN | Dodge | BHR Dodge | Stephanie Hamilton |
| 136 | Boris Said** | Carlsbad, CA | Chevrolet | CENTRIX Financial | Bob Sutton |
| 151 | Stuart Kirby** | Bowling Green, KY | Chevrolet | Marathon American Spirit Motor Oil | Joe Auer |
| 192 | Tony Raines** | La Porte, IN | Chevrolet | Front Row Motorsports | Bob Jenkins |
Cool!
Boris is back!