at the biggest Supercars race of the year, running a third WAU Commodore.
While William Sandbrook and Virgin Australia have already been confirmed as partners, it's now been announced that the major backing will come from NAPA Auto Parts.
The brand already backs Rossi's Andretti IndyCar programme.
“With such an iconic connection to Andretti Autosport and Alexander Rossi, it’s fantastic to have NAPA Auto Parts join us for the Bathurst 1000, especially after being able to witness first hand the passion for the brand in the United States this year," said WAU co-team principal Mathew Nilsson.
“Alexander and NAPA Auto Parts have shared some amazing achievements together in the NTT IndyCar Series, and we’re really excited about the opportunity to add to that in Australia, at Bathurst, alongside James Hinchcliffe.
“I’m sure the public are going to love the look of the car, and we cannot wait to show it to everyone in the coming weeks.”
The pair will kick start their Supercars adventure with a three-day test at Winton between October 1-3.
Practice for the 2019 Bathurst 1000 starts on Thursday October 10.
Alexander Rossi and James Hinchcliffe, Walkinshaw Andretti United
Walkinshaw Andretti United