William Byron was fastest in Friday’s final Xfinity Series practice at Homestead-Miami Speedway.
Byron, who is one of four drivers in contention for the Xfinity Series Championship in Saturday’s Ford EcoBoost 300, was the only driver to top 166 mph (166.087 mph).
Byron will jump to the NASCAR Cup Series next season, replacing Kasey Kahne.
Second through eighth were Ben Kennedy (165.685), Cole Custer (165.487), Christopher Bell (165.158), Sam Hornish Jr. (165.138), Casey Mears (165.057), Brennan Poole (164.880) and Tyler Reddick (164.179). Tenth-fastest was Ty Majeski (163.939).
Saturday’s championship race will be televised on NBCSN at 3:30 p.m. ET.