Jamie McMurray posted the fastest lap in Friday’s opening Cup practice at Kentucky Speedway.
Busch had the best average for 10 consecutive laps at 183.148 mph. He was followed by Denny Hamlin (182.955) and Truex (182.608). Nine cars ran at least 10 consecutive laps in the session.
There were no accidents in the 115-minute session. Richard Childress Racing reported that Ryan Newman‘s team would make an engine change because of a mechanical issue.
Final Cup practice is scheduled to be held from 1 – 2:25 p.m. ET today on NBCSN.