Despite spinning earlier in the session, Kyle Busch found his No. 18 M&M Caramel Toyota Camry on top of the speed charts, turning a lap at 173.320 mph at the end of final practice at Darlington Raceway Friday afternoon.
During the session, Busch spun to avoid trouble, seeming to avoid adding another scrape to the wall. Kevin Harvick finished second in the session with a speed of 173.070 mph followed by Jamie McMurray, defending race winner Martin Truex Jr., and Denny Hamlin rounding out the top five.
Trevor Bayne made hard contact with the outside wall late in the session when his car became loose in Turn 3, smacking the outside wall resulting in significant damage to the side of the No. 6 Advocare Ford.
The fastest driver in first practice found speed in 10-lap averages. Kyle Larson had the fastest of 26 cars who turned more than 10 consecutive laps. Just nine mph split first-place Larson from the 26th-place Cole Whitt.
Monster Energy NASCAR Cup Series Qualifying will begin at 1:30 p.m. ET on NBCSN while NASCAR Countdown to Green comes on at 5:30 p.m. ET on Sunday.