I love my eisenmann race set up. My install was about 1.5 hours. The sound really breaks in at about 3-4 weeks. Drone can be annoying sometimes but compared to stock 550 set up totally worth it. I would not want anything louder. Race is the way to go. Still classy but just loud enough when you get on it. The best is the sound of a cold start. Enjoy!
2014 BMW M6 Gran Coupe F06/M Performance Black Grille/20% Tint/ Exec Package/ Driver Assist Plus/ Black on Black
Sold-BMW 550i F10/Dinan S3/ Eisenmann Race Exhaust/ Vossen CV3s