Kansas #1 2021 Green Flag Average Speeds
| Rank | Driver | Finish | Green Flag Speed |
|---|---|---|---|
| 1 | Kyle Larson | 19 | 168.926 |
| 2 | Kyle Busch | 1 | 168.71 |
| 3 | Denny Hamlin | 12 | 168.428 |
| 4 | Brad Keselowski | 3 | 168.37 |
| 5 | Ryan Blaney | 21 | 168.255 |
| 6 | Chase Elliott | 5 | 168.078 |
| 7 | William Byron | 9 | 168.034 |
| 8 | Kevin Harvick | 2 | 168.018 |
| 9 | Christopher Bell | 28 | 167.939 |
| 10 | Tyler Reddick | 7 | 167.826 |
| 11 | Martin Truex Jr | 6 | 167.723 |
| 12 | Kurt Busch | 15 | 167.454 |
| 13 | Austin Dillon | 10 | 167.296 |
| 14 | Matt DiBenedetto | 4 | 167.186 |
| 15 | Ross Chastain | 14 | 166.882 |
| 16 | Austin Cindric | 22 | 166.66 |
| 17 | Joey Logano | 17 | 166.65 |
| 18 | Alex Bowman | 18 | 166.641 |
| 19 | Ryan Newman | 16 | 166.549 |
| 20 | Chris Buescher | 8 | 166.362 |
| 21 | Bubba Wallace | 26 | 166.161 |
| 22 | Aric Almirola | 29 | 166.114 |
| 23 | Chase Briscoe | 20 | 166.023 |
| 24 | Ricky Stenhouse Jr | 34 | 165.968 |
| 25 | Corey Lajoie | 27 | 165.511 |
| 26 | Daniel Suarez | 11 | 165.48 |
| 27 | Ryan Preece | 32 | 165.43 |
| 28 | Erik Jones | 25 | 165.412 |
| 29 | Michael McDowell | 13 | 165.41 |
| 30 | Anthony Alfredo | 23 | 165.405 |
| 31 | Cole Custer | 24 | 165.171 |
| 32 | Justin Haley | 30 | 163.164 |
| 33 | Garrett Smithley | 33 | 161.592 |
| 34 | BJ McLeod | 31 | 161.248 |
| 35 | Cody Ware | 36 | 160.342 |
| 36 | Joey Gase | 35 | 159.48 |
| 37 | Quin Houff | 37 | 159.474 |
| 38 | Matt Mills | 38 | 158.728 |
| 39 | Josh Bilicki | 39 | 157.558 |
