How does the optional Sport Exhaust System enhance the performance of the Audi R8?

I've heard about the Sport Exhaust System being offered as an optional upgrade for the Audi R8. How exactly does it improve the car's performance? Is it worth the extra cost?

The Sport Exhaust System for the Audi R8 consists of a specially designed, less restrictive exhaust system and can produce an additional 28 horsepower. It also enhances the engine's sound, giving it a sportier, more aggressive growl. As a car enthusiast, I highly recommend getting this option if you're looking to maximize the performance of your R8.