The livery is an evolution of that seen during the balance of the team's inaugural season with the drinks brand in 2013.
Its new truck partner, the Penske Automotive Group-distributed Western Star, has meanwhile now taken the lower portion of the front bar.
Mostert meanwhile has joined the factory Ford outfit this year following a stunning part-season at customer outfit Dick Johnson Racing in 2013.
“I am pretty relaxed to be where I am now and have worked all my life to get to a factory drive,” said Mostert ahead of Saturday's pre-season test at Sydney Motorsport Park.
“It will be great to get out on track, drive beside Frosty and learn as much as I can.
“I have huge shoes to fill as car six has had some awesome drivers over the years.
“My name isn't quite as famous as the guys that have gone before me but I am keen to continue the tradition of the success of every driver related to the FPR #6.”
Team-mate Winterbottom continues to strive for his and the team's first championship victory.
The 32-year-old won Bathurst last year before being pipped by Davison to third in the final series standings.
Winterbottom's 2013 season saw several on-track skirmishes cost points throughout the year.
Having previously been criticised for driving too conservatively at key moments, Winterbottom says that this year will be about finding the right balance.
“To win the championship you have to be aggressive, but also know when to be conservative, so success this year will be a matter of picking the right moment for each,” Winterbottom said.
“While we missed out on the title last year my rivals now know if there is a gap, I will have a crack.
“I added aggression to my driving style, I set a standard and their opinion has changed which is a good thing.”
See below for more images of the Pepsi Max Fords