Power overload: 500kW Mustangs confirmed for Oz

We saw it under the bonnet of Ford's wild 'King Cobra' Mustang concept at last November's SEMA aftermarket show in Las Vegas and now motoring.com.au can confirm the most powerful official supercharger kit ever offered by the Blue Oval will be available for Ford's new Mustang in Australia.

The sixth-generation 'Stang arrives in local Ford dealers in December, priced from under $45,000 for the Fastback EcoBoost manual, which is powered by a 233kW/432Nm 2.3-litre turbo-four.

Naturally, V8 versions will also be offered, with a 303kW/525Nm 5.0-litre bent eight gracing the sub-$55K GT coupe and the range-topping Convertible GT ($63,990 plus ORCs).

But for a little bit more money, Aussie Mustang customers will be able to pack a whole lot more performance – a V8 Supercar-crushing 670hp (500kW), in fact.

The power boost comes courtesy of Ford Performance Racing's official 'Super Pack', which was developed by famed US Mustang tuner Roush Performance and has been available from all Ford dealers in North America since shortly after the Mk6 Mustang went on sale there last September.

However, Roush's ballistic 500kW Stage 3 supercharger kit for the Mustang won't be available here from Ford dealers, although Ford Australia is close to announcing an official performance upgrade – developed by its European performance partner Mountune for EcoBoost turbo-four versions of the Mustang, Fiesta ST and Focus ST.

Instead, the hyper-blower for the Mustang GT will be available from Australia's official Ford Performance Racing distributor, Herrod Motorsport, who is also an official Roush Performance agent.

Full details of the high-output Mustang kit will not be announced until company chief, renowned Melbourne-based hot Ford builder Rob Herrod, returns from meetings with Roush and Ford in Detroit next month.

However, motoring.com.au understands the HSV GTS-killing Stage 3 kit could become available here for as little as $12,000-$15,000 depending on exchange rates.

Warranty details also remain unconfirmed, but all Roush kits come with a three-year/36,000-mile warranty in the US when installed by authorised dealers.

The Mustang GT blower kit could be the centrepiece of an entire range of Ford Racing Performance and Roush parts available here, including everything from bespoke body kits comprising body-colour bonnet, body side and quarter window scoops, to 20-inch forged or polished wheels, leather Recaro seats, billet pedals, manual shifter ball and even illuminated door sills.

Ford has announced a limited range of Mustang options for Australia, including racing stripes ($650), a black roof ($975), Nickel Lustre alloys and metallic paint (both $500).

But in the US, Mustang buyers can also choose a Drag Pack comprising heavy-duty half shafts and a rear sub-frame with high-performance bushings, or a Handling Pack with three-way adjustable coil-over suspension, new rear shocks, a stabiliser bar kit and shorter, stiffer springs that lower the car about an inch.

Priced from US $21,995 in North America, Roush's full Stage 3 Mustang GT package includes the supercharger kit, plus a quad-outlet active exhaust system, adjustable-height coil-over suspension with extreme-duty TrakPak axles and 20-inch Quicksilver wheels with ultra-high-performance Cooper RS3 tyres.

It also comes with a full body kit comprising front fascia, grille, chin splitter, hood scoop, side rockers, decklid spoiler, fender badges, windscreen banner, rear blackout panel, driving lights and graphics, plus a numbered/signed engine bay plaque, dash medallion, embroidered floor mats – all Roush-branded.

For many though, the Stage 3 big-bore blower should be enough. It includes Roush's new 2015-spec 2.3-litre Twin Vortices Series (TVS) supercharger, plus a six-rib belt drive system, unique intake manifold, electronic throttle body, air inlet system, fuel rail, high-flow fuel-injectors, air-to-liquid intercooler and a revised ECU with Ford Racing calibration.

Essentially the same spec as the 2014 Shelby GT500, the 'ROUSHcharged' 5.0-litre 'Coyote' V8 is claimed to deliver "more horsepower per litre than any other OE American muscle car, while maintaining an unrivalled level of driveability".

Fitted with an early 625hp (465kW) version, the King Cobra seen at SEMA is said to have achieved a 10.97-second quarter-mile pass at the Milan Dragway in Michigan last August.

Roush also offers a milder 325kW Stage 2 kit for the 5.0-litre GT and a Stage 1 kit for the Mustang EcoBoost in the US.

Ford's hotter naturally-aspirated 5.2-litre Shelby GT350 and GT350R will not be produced in right-hand drive, but a range of Shelby options will also be available for local Mustang owners via another Melbourne-based tuner, Mustang Motorsport Australia.

In fact, Shelby's official Australian mod-shop has already begun conversion work on a handful of 2015 Mustang GTs – the only examples in the country apart from Ford Australia's two left-hand drive models – for anyone willing to pay a handsome premium to be the first to own Ford's new pony car here.

In the absence of a factory RHD version of Chevrolet's new Camaro, the new Mustang looks like being one of the few affordable V8 performance cars to remain after Ford's homegrown Falcon XR8 and the Holden Commodore SS shuffle off in a few years.

Ford Australia now says it has more than 1500 firm orders and 15,000-plus potential buyers for the new pony car more than six months before its local release. It seems they'll have almost as many performance and customisation options.