You WON'T be disappointed!! I love the sound. In fact, I spend more time with the windows open and radio off us to to listen to the exhaust note and the wonderful burble when you back off on the throttle. BUT it needs the golf-tee mod. Without it, it's not as wonderful!.
2013 F30 335i | Sportline | Imperial Blue Metallic | Black Dakota | 6-speed | HK | Cold | Premium | 19" Staggered Sports | M-Performance Exhaust
2009 E90 335i
2007 E90 328xi