You can’t get any rarer or more exclusive than one of one.

The HSV GTS-R made its debut at the 2004 Sydney Motor Show, a race-prepared Monaro that was (supposedly) going to be available to members of the public as an Aussie alternative to the likes of a Porsche 911 Cup car.

HSV GTS-R rear

The GTS-R may have been a concept but it’s a working one and the level of modification over a regular Monaro makes it an extremely special car.

Under the bonnet is a tweaked LS2 good for 335kW/605Nm thanks to forged pistons, billet conrods, hotter camshaft, new exhaust system and recalibrated ECU. There’s also a double-row timing chain and massive aluminium radiator to keep reliability under control.

HSV GTS-R engine

Inside it’s full motorsport spec, with an FIA-compliant chrome-moly roll cage, onboard fire extinguisher system, dry-break fuel cell and proper AP Racing pedal box with adjustable brake bias.

HSV GTS-R interior

With HSV reviving the famous badge for its final hero model, its appearance on the market could not have been more perfectly timed.