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The fourth and final practice session of the weekend took place on Saturday morning at Daytona International Speedway after a brief delay due to rain at the start. The Fords were fast once again, posting the top 8 speeds in the session, although it should be noted that only 19 cars made a lap in this practice. This will be the last track time that these drivers see before taking the green flag for the Daytona 500 on Sunday.
Daytona 500 Practice #4 Speeds
| Rank | Driver | Time | Fastest |
| 1. | Harrison Burton | 47.782 | —.— |
| 2. | Joey Logano | 47.790 | -0.008 |
| 3. | Austin Cindric | 47.805 | -0.023 |
| 4. | Kevin Harvick | 47.807 | -0.025 |
| 5. | Chase Briscoe | 47.814 | -0.032 |
| 6. | Ryan Blaney | 47.827 | -0.045 |
| 7. | Cole Custer | 47.839 | -0.057 |
| 8. | Aric Almirola | 47.839 | -0.057 |
| 9. | Daniel Hemric | 48.447 | -0.665 |
| 10. | Justin Haley | 48.457 | -0.675 |
| 11. | Landon Cassill | 48.465 | -0.683 |
| 12. | William Byron Jr. | 48.833 | -1.051 |
| 13. | Kaz Grala | 49.186 | -1.404 |
| 14. | Ty Dillon | 49.318 | -1.536 |
| 15. | BJ McLeod | 49.500 | -1.718 |
| 16. | Todd Gilliland | 50.020 | -2.238 |
| 17. | Alex Bowman | 50.029 | -2.247 |
| 18. | Greg Biffle | 50.077 | -2.295 |
| 19. | Erik Jones | 50.214 | -2.432 |
Daytona 500 Practice #4 Ten-Lap Averages
| Rank | Driver | From Lap | To Lap | Speed |
| 1. | Ryan Blaney | 5 | 14 | 186.940 |
| 2. | Austin Cindric | 1 | 10 | 186.939 |
| 3. | Harrison Burton | 6 | 15 | 186.936 |
| 4. | Joey Logano | 8 | 17 | 186.932 |
| 5. | Chase Briscoe | 1 | 10 | 186.263 |
| 6. | Kevin Harvick | 1 | 10 | 186.241 |
| 7. | Aric Almirola | 1 | 10 | 186.229 |
| 8. | Cole Custer | 1 | 10 | 186.090 |
| 9. | Justin Haley | 2 | 11 | 185.218 |
| 10. | Landon Cassill | 2 | 11 | 185.138 |
| 11. | Daniel Hemric | 2 | 11 | 185.060 |
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