The Audi S4 is such a well built car for the true enthusiasts. From the factory you're getting a well built, comfortable and powerful car. At APR we can help take what you already have and make it even better! With a full support within Software & Tuning, Wheels, Brakes, Engine Hardware and so much more.

Transform your vehicle with our software upgrades. We optimize the factory management systems to take full advantage of the vehicle's capabilities to make the driving experience dramatically more exciting.