2017 Service King 300

The race was held on Saturday, March 25, 2017, in Fontana, California, at Auto Club Speedway, a 2 miles (3.2 km) permanent D-shaped oval racetrack.

At race's end, Kyle Larson, driving for Chip Ganassi Racing, would defend against eventual second-place finisher, Team Penske driver Joey Logano, on the final restart with four to go to win his sixth career NASCAR Xfinity Series win and his first of the season.

[3] Joey Logano of Team Penske would set the fastest time in the session, with a lap of 40.245 and an average speed of 178.904 miles per hour (287.918 km/h).

[4] The second and final practice session, sometimes referred to as Happy Hour, was held on Friday, March 24, at 2:00 PM PST, and would last for 55 minutes.

[3] Joey Logano of Team Penske would set the fastest time in the session, with a lap of 40.723 and an average speed of 176.804 miles per hour (284.538 km/h).