Kahne got bumped from behind by Newman on the backstretch, and that sent Kahne into Kurt Busch. The incident cut down Kahne's left-front tire, taking him out of contention.
Kahne was apparently unhappy with Newman, even though replays showed that Newman might have actually gotten a bump from Kyle Busch that sent him into Kahne.
With three laps to go, Kahne found himself racing on the same real estate as Newman, and as Newman took the high line in Turns 1 and 2, Kahne drifted up with him and got into his left rear quarterpanel. The contact sent Newman sideways, but Newman was able to gather it up and prevent a green-white-checker finish.
The contact did cost Newman two spots, however, and after the race the two drivers had a meeting in the garage. But their face-to-face made Kyle Busch and Todd Bodine's argument at Kentucky after Friday's Camping World Truck Series race look like a slobberknocker.
The incident dropped Kahne to 18th in the Sprint Cup standings, while Newman was able to jump to 13th, albeit 117 points out of the Chase.