“I’ve been through a lot,” the 31-year-old said after the race.
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“The first week in particular was super tough; I was on some weird drugs that make you think weird things.
“On some different stuff this week and it’s much better.”
Admitting he was in pain during his record-breaking win, van Gisbergen explained the modifications made to the steering wheel and gear selector in his #97 Commodore allowed him to be as comfortable as possible.