Originally Posted by HeelToe
I had an Eisenmann on my e90 330i for 2 years and then replaced with the BMW Perf exhaust because I couldn't stand the drone when cruising. Obviously this comment doesn't apply to an n55 135. I can say though that my 135is with the BMW perf exhaust is unbelievable.
So with that being said, will the amount of drone on your 330i the same on my car which is n55 135i? Is it really bad drone in cruising speed? I think my n55 is now making a little bit drone while cruising but only when you really listen to it. Have you ever heard Meisterschaft? How does it sounds compared to Eisenmann? Thanks