The Porsche 911 Turbo on a heavy dose of tuner steroids tops out at more than 360 kph (224 mph).

It wasn’t that long ago when Gemballa infused 828 horsepower into a Porsche 911 Turbo and now it has done it once again, but with a wide body twist. Debuting at SEMA this week in Las Vegas, the GT Concept features fender extensions broadening the front axle by 30 millimeters (1.18 inches) and the rear axle by no less than 50 mm (1.96 in.)

More 911:

Thanks to the wider hips, the high-performance coupe born in Stuttgart and tweaked by Gemballa in Leonberg can now accommodate bigger 21-inch forged wheels allowing the Nine Eleven to send a more look-at-me vibe. But it’s the massive all-carbon wing at the back that catches most of the attention and it’s part of a comprehensive aerodynamic kit that also includes new bumpers, side skirts, and a carbon rear diffuser.

The main highlight of the ambitious Porsche project is represented by the reworked biturbo 3.8-liter boxer engine no longer producing the standard 540 horsepower (397 kilowatts) and 710 Newton-meters (523 pound-feet) of torque available in the regular 911 Turbo. Gemballa has worked its magic on the rear-mounted six-cylinder engine to squeeze a whopping 828 hp (609 kW) at 7,000 rpm and an equally impressive 952 Nm (702 lb-ft) from 5,200 rpm.

With all of the upgrades in place, the GT Concept will run to 62 mph (100 kph) in only 2.38 seconds, thus making it about 0.6s quicker than a regular 911 Turbo fitted with the Sport Chrono Package. If you’re a big fan of performance numbers, Gemballa has got you covered: 0-124 mph (0-200 kph) in 7.5 seconds, 0-186 mph (0-300 kph) in 18.8 seconds, 62 – 124 mph (100-200 kph) in 4.7 seconds, and 124-186 mph (200-300 kph) in 11.9 seconds. Top speed? More than 224 mph (360 kph), with the German tuner promising to announce an exact figure in the future.

Let’s talk money. Gemballa wants €25,450 for the aero pack, another €7,150 for the wheels and tires combo, an extra €3,880 for the carbon fiber airbox, and an eye-watering €49,800 for the engine upgrade. Needless to say, you’ll also need a 911 Turbo available in its domestic market Germany from €176,930. Doing the math, it means the GT Concept with all the bells and whistles costs an astounding €263,210 (including a new car), so it’s more expensive than a €259,992 Turbo S Exclusive Series. The hardcore GT2 RS continues to be the priciest of them all, at €285,220.

Source: Gemballa

Gallery: Gemballa GT concept based on Porsche 911 Turbo