With 620-horsepower on tap from the twin-tubo'd boxer engine for a 0-100km/h (62mph) sprint time of just 3.5 seconds and top speed of 330 km/h (205 mph), we'd argue Porsche's 911 GT2 RS is lighting quick. However, German tuning house Wimmer RS has a mind of its own when it comes to performance even if we're talking about a sports car that will be produced in a limited run of just 500 units.  

The tuner's upgrades are concentrated on the 911 GT2 RS' 3.6-liter six-cylinder boxer which benefits from a remapped engine controller, optimized turbochargers, a sport air-filter, new air-intake and a valve-controlled sport exhaust system along with sport catalysts. These modifications bump output from 620 to 703-horsepower, while peak torque rises from 700Nm to an even more impressive 810Nm or 597.5 pound-feet. According to Wimmer RS, the powered-up 911 GT2 RS can now complete the sprint from 0 to 100km/h in 3.3 seconds and pass the 200 km/h mark after just 9.5 seconds (stock model: 9.8 seconds), while continuing up to a top speed of 356 km/h or 221.2 mph.