How can I improve the performance of my BMW M7's exhaust system?

I have been experiencing a decrease in power and efficiency in my BMW M7's exhaust system. What could be causing this issue and what steps can I take to fix it?

You could be experiencing a restriction or buildup in your exhaust system which is causing the decrease in performance. It is important to regularly inspect and clean your exhaust system to prevent these issues.

Another possible cause could be a faulty oxygen sensor. This can affect the air to fuel ratio and cause a decrease in performance. I recommend having your oxygen sensors checked and replaced if necessary.

Have you recently modified your exhaust system? Aftermarket modifications can sometimes cause performance issues if not done properly. Consider reverting back to the stock exhaust or consult with a professional mechanic for proper installation.