Championship contender Martin Truex Jr. topped the leaderboard in Friday’s first practice at Homestead-Miami Speedway, wheeling his No. 78 Furniture Row Racing Toyota around the track at 173.997 mph.
Fellow Championship 4 driver Kyle Busch was second-fastest in the No. 18 Joe Gibbs Racing Toyota at 173.299 mph.
Clint Bowyer, Chase Elliott and Kevin Harvick, the third of four drivers competing for the 2018 championship in Sunday’s Ford EcoBoost 400 (3 p.m. ET, NBC, MRN, SiriusXM NASCAR Radio), rounded out the top five.
RELATED: Practice results
Joey Logano, the fourth member of the Championship 4, never found much speed in his No. 22 Team Penske Ford, and his best lap of 172.194 mph was good for just 16th best.
Elliott served a 15-minute practice hold at the end of the session for being late to inspection at Phoenix.
The Monster Energy Series returns to the track at 6:10 p.m. ET for Busch Pole Qualifying (NBCSN/NBC Sports App).