"Holden has been tested many times as series regulations have evolved throughout the years, and we have met each one with success," McNamara said.
"V8 Supercars' Car of the Future in 2013 is no different. Today's announcement makes a clear statement that Holden is ready to meet the COTF challenge head on.
"With the Holden Racing Team and TeamVodafone, we have the two very best teams, four championship-winning drivers, and the finest race engineering capabilities. Holden is better prepared than ever before."
HRT and TeamVodafone have 11 of the past 16 championships while HRT has won the Bathurst 1000 seven times and TeamVodafone have four Bathurst crowns.
"We are only racing to win and Holden's continued support will undoubtedly help us to maintain that record as we enter this critical development phase in the V8 Supercar Championship Series," TeamVodafone managing director Roland Dane said.
"We look forwards to continuing to win for Holden for many years to come."
The 2012 V8 Supercar Championship begins with this weekend's Clipsal 500 in Adelaide, the first of 15 championship events.
- AAP