#3-Austin Dillon was quickest during happy hour for the Dollar General 300 with a speed of 179.748mph. He was followed by: #33-Kevin Harvick, #30-Nelson Piquet, Jr., #98-Kevin Swindell, #5-Brad Sweet, #99-Alex Bowman, #77-Parker Kligerman, #6-Trevor Bayne, #2-Brain Scott, and #60-Travis Pastrana. 39 drivers participated in the session. See complete results on the Chicago practice 2 speeds page (pdf) .
