Rosenqvist set the fastest four-lap average of 233.947mph around the 2.5-mile oval with just over an hour remaining of the six-hour session, boasting a quickest single lap 234.329mph.
“That was a phenomenal run,” he said. “I wasn’t super-happy with my first run, so we trimmed the car out but I had no idea we’d be so quick. That put a smile on my face.”
