Holden’s Special Vehicles division goes out with the loudest bang yet: the 636 horsepower GTSR W1. It’s a is an LS9-powered Chevy SS. GM will certainly close the Australian Holden division this season, killing the vehicle that the Chevy SS is based on along the way.

Yes, America’s best performance and value sedan is nothing more than a Holden Commodore wearing a ribbon and bow tie, and to make sure we will keep that in mind, Holden Special Vehicles created a Corvette-powered version being a tribute to Aussie wheel smoke. The actual GTSR W1 really is the last of the V8 Interceptors.

Prior to getting into the figures, we believe you have to listen to this particular thing, simply because it’s all you need to hear. For that, all of us turn to the Australian journalist Dave, who managed to get behind the wheel of the pre-production prototype at the Phillip Island Grand Prix Circuit:

The kW numbers are literally smaller, though. But here are the figures you want to know:

The engine is an LS9 featuring a gen-6 supercharger with twin four-lobe rotors, producing 636 horsepower at 6500rpm, with 601 ft.-lb. of torque available from 3900 revs. It also features an integrated dual-element air-to-liquid intercooler, direct-mount ignition coils, a carbon fiber airbox, an E67 control module, high-flow roto-cast cylinder heads, and ceramic-coated stainless steel headers.

Tremec TR-6060 close-ratio 6-speed manual gearbox is connected to that. Under the car, there is a suspension that the Aussies call SupaShock. In front, you get a coil over monotube strut along with double performing dual-bush spectrum of ankle support conjoined with multilink suspension and steering and a direct-acting stabilizer bar. At the back, there is a multilink independent suspension managed via coil over damper with built-in lateral assistance for the ultimate drifting experience.

To really make it stop, HSV fitted AP Racing’s beefiest steel brakes. The supercharger’s whining originates from a hi-flow exhaust with x-pipe advanced, bi-modal mufflers and quad tailpipes. Also, there are great color choices Spitfire Eco-friendly, Son of the Gun Greyish, Light, The Fire Fruit Phantom Dark or Trick Red.

Cheers to Holden and HSV!