2017 Advance Auto Parts Sportscar Showdown

[4] With 72 points, the PC Drivers' Championship was led by James French, Patricio O'Ward, and Kyle Masson with a twelve-point advantage over Sean Rayhall.

[4] Cadillac, Ford, and Mercedes-AMG were leading their respective Manufacturers' Championships, while Wayne Taylor Racing, Performance Tech Motorsports, Ford Chip Ganassi Racing, and Riley Motorsports Team AMG each led their own Teams' Championships.

[5] In P, Marco Bonanomi replaced Tom Kimber-Smith in the PR1/Mathiasen Motorsports entry while José Gutiérrez returned after missing the previous race at Long Beach.

In GTLM, Wolf Henzler replaced Kévin Estre in the #912 Porsche GT Team, due to a clash with the FIA World Endurance Championship round at Circuit de Spa-Francorchamps.

[9] Parker Chase and Harry Gottsacker replaced Wolf Henzler and Jan Heylen in the #991 TRG entry.

Mathieu Jaminet subbed for Michael Christensen in the #28 Alegra Motorsports due to a clash with the FIA World Endurance Championship round at Circuit de Spa-Francorchamps.

[17] The third and final practice session took place at 8:55 am CT on Friday and ended with Dane Cameron topping the charts for Whelen Engineering Racing, with a lap time of 1:56.117.

[20] Patricio O'Ward set the fastest time PC by 3.382 seconds ahead of Don Yount in the #20 BAR1 Motorsports entry.

Regulations stipulated that teams nominate one qualifying driver, with the fastest laps determining each class' starting order.

IMSA arranged the grid to put Prototypes ahead of the PC, GTLM and GTD cars.

Mathieu Jaminet qualified on pole for the class driving the #28 Alegra Motorsports, besting Jack Hawksworth in the #15 3GT Racing entry.

James French set the fastest time driving the #38 Performance Tech Motorsports entry.

Jordan Taylor Eric Curran Christian Fittipaldi Stephen Simpson Ed Brown Antonio García Alexander Sims Nicholas Boulle Martin Tomczyk Dirk Werner Joey Hand Alessandro Balzan Kenny Habul Madison Snow Bret Curtis Gunnar Jeannette Daniel Morad Patrick Lindsey Sage Karam Lawson Aschenbach Mike Skeen Jack Hawksworth Colin Braun Katherine Legge Ryan Dalziel Harry Gottsacker