#19-Matt Tifft was fastest during opening practice at Kentucky with a speed of 180.427mph.
The rest of the top 10: #3-Brian Scott, #20-Ryan Preece, #33-Brandon Jones, #7-Justin Allgaier, #2-Kennedy, #1-Sadler Elliott, #42-Tyler Reddick, #23-Spencer Gallagher, and #48-Brennan Poole.
36 drivers practiced during the session.
See complete results on the Kentucky practice 1 speeds page (pdf).
