500 horsepower Audi RS5 by Senner Tuning German tuner dials output up to 506 PS (372 kW / 499 bhp) and 478 Nm (353 lb-ft) from the series 450 PS (331 kW / 444 bhp). Senner also adds a Bilstein suspension kit and 20-inch wheels. By Motor1.com Team Aftermarket / Tuning - Dec 17 2010
