The APR Stage III Turbocharger System is a turnkey solution designed to expand on the TT RS’s already stellar performance by increasing peak horsepower to roughly double that of the European model. Sitting at 665 horsepower and over 560 ft-lbs of torque on high octane fuel, the vehicle’s performance is transformed to that of a modern day equivalent of Audi’s motorsport 5-cylinder engines of yesteryear. APR’s advanced knowledge of engine management combined with an uncompromising selection of premium materials, access to the latest engineering equipment and techniques, as well as a highly educated and capable staff of engineers, resulted in a turbocharger system capable of delivering a truly exhilarating and fulfilling driving experience. Read More.