Holden driver Lee Holdsworth is switching sides at the end of this season.
Holdsworth, who currently drives a Garry Rogers Motorsport Commodore, will run a Stone Brothers Racing Ford Falcon in 2012.
He will replace Alex Davison in the #4 SBR/Irwin Tools car, and will join young Kiwi flyer Shane van Gisbergen and Tim Slade in the Stone Brothers Team.
His first appearance will be at the Clipsal 500 in Adelaide in March.
"The V8 Supercar Championship Series is the most competitive of its type in the world and you have to keep chasing what you think will give you an advantage over the opposition," said team co-owner Ross Stone.