Will Davison's Bathurst victory is in doubt after Red Bull Racing protested a penalty against Jamie Whincup.

Jamie Whincup may be trying to take his Bathurst 1000 title, but that won't stop Will Davison from planning his close mate's bachelor party.

Davison and Whincup's friendship goes back 20 years to when they were racing go-carts but the pair find themselves in a seemingly awkward situation following Davison's controversial victory on Mount Panorama on Sunday.

Whincup crossed the line first but a 15-second penalty saw the Red Bull Racing driver relegated to 11th place, handing Davison his second Bathurst triumph.

Red Bull subsequently launched a $10,000 protest but regardless of the outcome, Davison says it won't affect their friendship.

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ROBERT CIANFLONE/GETTY IMAGES Red Bull Racing driver Jamie Whincup may yet win the Bathurst 1000 after appealing a 15-second penalty.

Whincup helped Davison celebrate on Sunday and, while the sport eagerly awaits the verdict, the 34-year-old told news.com.au that he will spend the week preparing for Whincup's stag party.

"We are best mates," Davison said.

"Nothing can ever change that. We have raced against each other for years and we put that on track rivalry aside. As I said Jamie was the first in to congratulate me with a beer in my motorhome. He is a complete professional and someone I admire. What you see is what you get with Jamie, and I am proud of that.

"We are great mates and we understand what racing is and how to separate it from everything else."

Whincup was penalised after colliding with Volvo's Scott McLaughlin with 11 laps remaining, causing a crash that ended the title hopes of Holden Racing Team's Garth Tander.

Davison finished 0.14 seconds in front of Kiwi Shane van Gisbergen but was adamant he did not win by default.

"We are proud of the race we executed and we didn't put a foot wrong," he told news.com.au.

"I am enjoying the win, the day and being a Bathurst champion again. We did everything we needed to do to win the race and that is what we did. What they are doing has nothing to do with me."

No date has been set for the hearing with Red Bull Racing officials expected to submit evidence to the Supercars appeals court on Tuesday.