Tuner builds 580 horsepower Audi Q7

German tuner Nothelle has unveiled a 580 horsepower version of the Audi Q7. The car has a 580 horsepower powerplant with 530 pound-feet of torque. The power increase is achieved by fitting a twin-turbocharger to the Q7's stock 4.2-liter V8. A similar tuning kit is also planned for the Q7's 3.0-liter TDI engine, pushing performance to 275 hp and 443 pound-feet. The modified Q7 rides on 22-inch wheels with matching high-performance tires. Image gallery after the jump...