Road Atlanta: #55: Mazda Motorsports Mazda DPi, DPi: Harry Tincknell, Oliver Jarvis, Jonathan Bomarito, #9: PFAFF Motorsports Porsche 911 GT3R, GTD: Zacharie Robichon, Laurens Vanthoor, Lars Kernm, #31: Whelen Engineering Racing Cadillac DPi, DPi: Felipe Nasr, Pipo Derani, Mike Conway
#55: Mazda Motorsports Mazda DPi, DPi: Harry Tincknell, Oliver Jarvis, Jonathan Bomarito, #9: PFAFF Motorsports Porsche 911 GT3R, GTD: Zacharie Robichon, Laurens Vanthoor, Lars Kernm, #31: Whelen Engineering Racing Cadillac DPi, DPi: Felipe Nasr, Pipo Derani, Mike Conway