I got the DINAN exhaust installed on the 550i. Total cost 3k installed at Performing Imports in Atlanta. I took advantage of the 20% of sale going on through the end of the month. Not sure how to post sound clips. I HATED OEM sound, to quiet.. and I did not want it to sound like a mustang so after hours of research I decided to go with DINAN. I am very satisfied with the result, Aesthetically speaking, 10 out of 10, great aggressive look with just enough sticking out. Sound, 8 out of 10, BIG difference from OEM (which is not saying much). If your looking for a muscle car sound this is not the choice for you....maybe Meisterschaft GTC Exhaust (
) is your choice. If you want a deeper sound with NO drone this is the way to go!