Triple Eight had originally planned to debut the new European designed Commodore Supercars with the 3.6 litre twin-turbo engine currently in development GM Racing's plant in Michigan, in America.
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The decision will allow the engine to undergo further development to ensure parity with V8 power plants can be reached before its full launch in 2019.
The news arrived alongside the first official renders of the new look Holden Commodore Supercar.
The introduction of non V8 engines is a key part of Supercars' new Gen2 regulations which come into force next season.
Such a seismic shift in engine configuration has proved divisive among fans accustomed to the traditional V8 units.
However, championship organisers have made the move to help the series maintain its market relevance and entice other manufacturers into the category.
While the latter has so far not eventuated, V6 turbo engines will conduct their first racing miles next season.
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