What is the purpose of the performance exhaust system?

I have recently come across the option of adding a performance exhaust system to my BMW 6 Series. What exactly is the purpose of this upgrade and how does it impact the car's performance?

The performance exhaust system enhances the engine's exhaust flow, resulting in increased power and torque. It also adds a deeper, more aggressive sound to the exhaust note. Additionally, it reduces backpressure and allows for better fuel efficiency.

I would recommend getting a performance exhaust system if you want to improve the overall performance and sound of your BMW 6 Series. It may not provide a significant increase in power, but the difference in sound and driving experience is definitely worth it.