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2018 Holden Commodore Supercars racer revealed with rendering

Com-gen of Gen II Supercar built around Holden's Insignia-based Commodore replacement.

Digital sketches of a 2018 Holden Commodore Supercar have been released, as the factory operation moves its racing allegiances from the incumbent Walkinshaw Racing outfit to series champions Triple Eight Racing.

The sketches, commissioned by Supercars, show a predominantly Holden-liveried version of the 2018 Holden Commodore, which is based on the latest Opel Insignia from Europe. The Opel will replace the current Australian-made Commodore, which will end production on October 20 this year.

Next year marks the start of the Gen2 era for the Supercars series, with a revised set of regulations allowing teams the freedom to move away from the category's traditional V8 model.

No longer will a car be required to be a four-door sedan derived from a locally made car powered by a naturally aspirated V8 – although that combo won't be banned.

The category introduced a series of 'boxes', or measurement windows, in which a new car must fit when it released the Gen2 regulations in 2015.

"There's a chassis and you have to fit that chassis. We have an engine box and your engine has to fit within that accumulated engine power and engine performance weighted average," Supercars Technical and Sporting Director David Stuart told

"We have an aerodynamic box, your car has to fit within this aerodynamic box and it doesn't matter if your car is a six-door or a two-door."

There's speculation that teams may use a Ford Mustang bodyshape.

No team has elected to break with the status quo for 2017, with the biggest change to the series being the loss of the factory Volvo S60s after the Swedish parent company withdrew support for the program, even forbidding the cars from ever being used again.

There's speculation that teams may use a Ford Mustang bodyshape in 2018, though Ford Australia has categorically stated that it wouldn't back a Supercars team again in the foreseeable future.

Likewise, Kia has recently been connected to the series, with the V6 turbocharged Stinger coupe a good fit size-wise for the category, and senior management admitting to meetings with Supercars officials.

Holden, however, is sticking by the four-door philosophy, as it attempts to woo a new generation of Commodore buyers to the new car.

With the V8 engine bowing out with the VF Commodore, Holden's flagship sedan will sport all-wheel-drive and a twin-turbocharged V6 – and the race car will feature a similar powerplant.

A twin-turbo V6 engine is already well under development in the United States, likely being based on the 3.6-litre twin-turbo LF4 that's under the bonnet of Cadillac's flagship ATS-V four-door and coupe.

The Triple Eight team – who oversaw the design of the safer, faster Gen1 COTF car that debuted in 2012 – has been working on a body shape with Holden and GM since the middle of 2015. It will also become the official supplier for teams wishing to use the Commodore from 2018.

What do you think of the 2018 Holden Commodore racer? Tell us what you think in the comments below.