| Teams 2006 O'Reilly Auto Parts 300 |
|---|
| No. | Team | Driver | Mfg |
|---|---|---|---|
| 00 | Haas CNC Racing | Johnny Sauter | Chevrolet |
| 1 | Phoenix Racing | Jason Keller | Dodge |
| 1 | Dusenberg & Leik Motorsports | Jay Sauter | Chevrolet |
| 2 | Richard Childress Racing | Clint Bowyer | Chevrolet |
| 4 | Biagi DenBeste Racing | Mark Green | Dodge |
| 5 | Hendrick Motorsports | Kyle Busch | Chevrolet |
| 5 | Day Enterprise Racing | Chad Chaffin | Chevrolet |
| 6 | Roush Racing | Mark Martin | Ford |
| 6 | Roush Racing | Todd Kluever | Ford |
| 9 | Evernham Motorsports | Kasey Kahne | Dodge |
| 10 | ppc Racing | John Andretti | Ford |
| 11 | Dale Earnhardt Inc. | Paul Menard | Chevrolet |
| 12 | FitzBradshaw Racing | Joel Kauffman | Dodge |
| 14 | FitzBradshaw Racing | Tracy Hines | Dodge |
| 16 | Roush Racing | Greg Biffle | Ford |
| 17 | Roush Racing | Matt Kenseth | Ford |
| 18 | Joe Gibbs Racing | J.J. Yeley | Chevrolet |
| 20 | Joe Gibbs Racing | Denny Hamlin | Chevrolet |
| 21 | Richard Childress Racing | Jeff Burton | Chevrolet |
| 22 | ppc Racing | Kenny Wallace | Ford |
| 25 | Team Rensi Motorsports | Ashton Lewis | Ford |
| 27 | Brewco Motorsports | David Green | Ford |
| 32 | Braun Motorsports | Jason Leffler | Chevrolet |
| 33 | Kevin Harvick Incorporated | Kevin Harvick | Chevrolet |
| 34 | Frank Cicci Racing | Mike Bliss | Chevrolet |
| 35 | Team Rensi Motorsports | Regan Smith | Ford |
| 36 | McGill Motorsports | Tim Sauter | Chevrolet |
| 38 | Stringer Motorsports | A.J. Foyt IV | Dodge |
| 39 | Team Penske | Kurt Busch | Dodge |
| 41 | Chip Ganassi Racing | Reed Sorenson | Dodge |
| 42 | Chip Ganassi Racing | Casey Mears | Dodge |
| 43 | Baker Curb Racing | Aaron Fike | Dodge |
| 47 | Frank Schwantz | Jon Wood | Ford |
| 50 | Roush Racing | Danny O'Quinn, Jr. | Ford |
| 59 | Frank Schwantz | Stacy Compton | Ford |
| 60 | Roush Racing | Carl Edwards | Ford |
| 64 | Rusty Wallace Racing | Jamie McMurray | Dodge |
| 66 | Brewco Motorsports | Scott Wimmer | Ford |
| 77 | Kevin Harvick Incorporated | Burney Lamar | Chevrolet |
| 84 | Clay Andrews Racing | David Gilliland | Chevrolet |
| 88 | JR Motorsports | Mark McFarland | Chevrolet |
| 90 | Yates Racing | Stephen Leicht | Ford |
| 99 | Michael Waltrip Racing | Michael Waltrip | Dodge |