in the second practice session, hélio castroneves in the no. 6 penske acura arx-05 recorded the fastest lap of the day with a 1-minute and 37.096 seconds effort. he was ahead of the no. 22 extreme speed nissan of nicolas lapierre and albquerque's no. 5 mustang sampling car. the leading lmp2 car was colin braun behind the wheel of the no. 54 core car in fourth. jonathan bomarito rounded out the top five in mazda's no. 55 vehicle. patrick pilet led gtlm in the no. 911 porsche with a 1-minute and 43.902 seconds lap set late in the session. jan magnussen's no. 3 corvette was second. westbrook in the no. 66 chip ganassi ford rounded out the top three in the category. álvaro parente's no. 86 michael shank racing acura-nsx gt3 was fastest in gtd, while molina was 0.242 seconds slower in the no. 82 risi ferrari.