After the 710HP Audi R8 V10 we told you about earlier this year, American aftermarket specialists at STaSIS Engineering introduced to the UK another upgrade for the German sports car, albeit this time for the V8-powered model. At 540HP, the Audi R8 V8 Challenge Extreme Edition has 120 more horsepower than the standard V8 model and 15 more horsepower than the V10 factory version. STaSIS says the car also features an upgraded suspension response and handling abilities. Read more �
