Rumored to be called the GTS-R, HSV is keeping tight-lipped about the project and only admits that it wants to "go out with a bang," Drive reports. The ZR1's 6.2-liter supercharged V8 would certainly accomplish that, and the output comfortably tops the current Commodore GTS (pictured above) that puts out 577 hp from its LSA V8. Borrowing the 'Vette's carbon-ceramic brakes is a possibility, as well, to make sure the muscle car can haul down the powerful engine.
Opting for the latest LT-family of V8s isn't an option for the GTS-R because it reportedly doesn't fit in the engine bay, according to Drive. However, the LS9 isn't a perfect solution, either, because GM only keeps a limited stock of them. That means 200 or fewer of the farewell Commodores are likely to see Aussie roads. Combined with a price expected around 100,000 Australian dollars ($71,500 at current rates), they're almost guaranteed to be a seriously quick collector's item.