Earl Bamber finished second in the latest IMSA race at Long Beach, trailing Chip Ganassi teammate Renger van der Zande to the chequered flag in a 1-2 for the team.
The Kiwi is now the championship leader in the Daytona Prototype class.
Van der Zande and co-driver Sebastien Bourdais started the race on pole. However, Bourdais would clatter a concrete wall while lapping a GT car.
Despite falling to dead last in the prototype field, Bourdais and van der Zande muscled back to the lead.
Bourdais rebroke the race lap record on numerous occasions. He did the same with the qualifying lap record on Friday.
After 100 minutes, van der Zande beat Bamber home by 3.7 seconds.
It is the 67th IMSA victory for the Chip Ganassi crew. They also have their IndyCar contingent racing on the streets of Long Beach this weekend.
Tristan Vautier and Richard Westbrook came home in third, giving Cadillac a podium lockout.
All six prototypes finished on the lead lap. There were early nerves about fuel targets, though those were eased thanks to an extended caution period.
Aston Martin won the GTD Pro class, benefitting from a drive-through penalty for their Corvette rivals.
BMW comfortably won the GTD class, even finishing ahead of some Pro entries. It is the first American victory for the M4 GT3 car.