Phoenix, which will once again host the title-decider for all three national divisions this year, is a critical track to get right for teams this season as they become acclimated with the Next Gen car.
The two-day test ended with Team Penske's Ryan Blaney on top of the speed charts at 131.907mph with teammate Joey Logano just behind at 131.738mph. Kyle Larson led Day 1 at 131.728mph.
The second day of testing was slowed by a couple incidents. 2020 NASCAR Cup Series champion escaped unscathed after two spins at the exit of Turn 4. Rookie Todd Gilliland was not as fortunate when he lost traction exiting Turn 2, making contact with the outside wall.
The next time we see the new car on track will be in The Clash at the L.A. Memorial Coliseum from February 5-6.
| Pos. | Driver | Team | Manufacturer | Best Speed (mph) |
| 1 | Ryan Blaney | Team Penske | Ford | 131.909 |
| 2 | Joey Logano | Team Penske | Ford | 131.738 |
| 3 | Chase Briscoe | Stewart-Haas Racing | Ford | 131.502 |
| 4 | Chase Elliott | Hendrick Motorsports | Chevrolet | 131.325 |
| 5 | Kevin Harvick | Stewart-Haas Racing | Ford | 131.114 |
| 6 | Martin Truex Jr. | Joe Gibbs Racing | Chevrolet | 131.000 |
| 7 | Todd Gilliland | Front Row Motorsports | Ford | 130.463 |
| 8 | Kyle Larson | Hendrick Motorsports | Chevrolet | 130.402 |
| 9 | Ross Chastain | Trackhouse Racing | Chevrolet | 130.241 |
| 10 | Kyle Busch | Joe Gibbs Racing | Toyota | 130.222 |
| 11 | Brad Keselowski | RFK Racing | Ford | 130.020 |
| 12 | Wallace/KuBusch | 23XI Racing | Toyota | 129.940 |
| 13 | Harrison Burton | Wood Brothers Racing | Ford | 129.903 |
| 14 | Justin Haley | Kaulig Racing | Chevrolet | 129.739 |
| 15 | Ty Dillon | Petty GMS Motorsports | Chevrolet | 129.585 |
| 16 | Austin Dillon | Richard Childress Racing | Chevrolet | 129.562 |
| 17 | Ricky Stenhouse Jr. | JTG Daugherty Racing | Chevrolet | 129.375 |
| 18 | Loris Hezemans | Team Hezeberg | Ford | 128.903 |
