Land's Audi of Connor De Phillippi ceded the GTD lead to Core's No. 54 Porsche of Colin Braun when a flat right rear tire, due to accumulated debris, forced it to make a pit stop. Brett Sandberg's Change Lamborghini then struck the Bus Stop chicane exit barrier, causing the seventh caution. After the 20-minute caution, Kanaan lapped quickly in the wet conditions and moved the No. 69 Ford from seventh to second in GTLM. 3GT's sole remaining Lexus of Dominik Farnbacher bowed out of the battle for the GTD lead when it made an unscheduled pit stop for a replacement door after a right rear tire failure on the bank destroyed the car's right rear. An eighth caution was needed when Hartley, in the second-place No. 22 ESM Nissan, failed to generate tire temperature on the wet track and ran onto the grass at both hairpins. He hit the side of Wolf Henzler's No. 991 Porsche leaving turn six, spinning him sideways into the outside barrier on the bank. Hartley could not steer due to damage, and stopped on the entrance to the Bus Stop chicane for recovery to the pit lane on a flatbed truck. This moved Barbosa's Mustang Sampling Cadillac up to second overall, a lap behind WTR's Ricky Taylor.
