What to Consider when Upgrading the Exhaust System on a BMW M3?

I recently purchased a BMW M3 and I am looking to upgrade the exhaust system to improve performance. What factors should I consider before making a decision?

Another aspect to consider is the material of the exhaust system. Stainless steel is a popular choice for its durability and corrosion resistance, but it can be more expensive. On the other hand, a cheaper option like aluminized steel may not last as long.

First and foremost, you should consider the type of driving experience you want. Are you looking for a louder and more aggressive sound, or do you prefer a smoother and more refined one? This will help determine the type of exhaust system you should choose.