Does anyone know which exhaust brackets or mounts needed to be change, that is causing the car to have vibration?

 

The 550i has a different exhaust setup then the 528 V6 engines.

 

528 is a straight 6, not v6.
and faulty exhaust brackets dont cause vibrations.

 

Your post has almost no info for any useful replies from any of us.
What problem does your car have?
What kind of vibration? What RPM range? ROad speed related or only engine speed related? Stays the same in gear or out of gear?