Porsche's high-performance flagship is here.

Stepping out of the traditional auto show circuit, Porsche has traveled to the E3 conference to give us an early glimpse at the upcoming 911 GT2 RS.

The GT2 RS was shown at E3 because it's one of the stars of the upcoming Forza 7 video game. The high-performance flagship receives a specific front bumper with large air dam, a new hood that incorporates a pair of NACA ducts, a specific rear bumper, and a huge wing on the deck lid.

As we previously reported, the GT2 RS benefits from an evolution of the Turbo S model's turbocharged 3.8-liter flat-six engine. Applying lessons learned on the track, Porsche's GT division added two bigger turbos tweaked to provide more boost, a model-specific exhaust that's much lighter, and stronger internal components.

British magazine Evo has learned the GT2 RS receives a water-injection system that reduces intake temperature. Similar to what's offered on the BMW M4 GTS, the water-injection system bumps the flat-six's power output while improving efficiency and reducing wear on key components.

The GT2 RS is still at the prototype stage so final specifications aren't available yet. However, we know the six will send over 641 horsepower and 553 pound-feet of torque to the rear wheels via a dual-clutch automatic transmission. Porsche promises a zero-to-62-mph time of under three seconds.

"It's not just a chipped Turbo S, definitely not. It's a completely re-engineered car," said Porsche GT project director Andreas Preuninger in an interview with Evo. "[It's] a lot easier to drive than a 997 GT2 RS, which was a brute, to the point where you couldn't handle it sometimes," he added.

To save weight, Porsche has removed some of the sound-deadening material and replaced the glass with thinner Gorilla Glass. Buyers who want an even lighter car will be able to order the optional Weissach Package, which bundles magnesium wheels, a titanium roll cage, and a carbon fiber roof, among other go-fast goodies.

Porsche will begin pre-production of the 911 GT2 RS in the coming weeks, meaning the series-produced car is likely at least a few months away from hitting showrooms. We could see it this fall at the Frankfurt Auto Show, or at next year's Geneva Auto Show. Either way, it will land as a limited-edition model priced at over $200,000.