just got around doing this. maybe my head is playing tricks on me, but i do feel and hear the difference!!! best bang for the buck, imo.
thanks, blake, for this dyi.
2015 F31 Sport Wagon - Bimmer onsh'mo
2014 Tesla Model S - Not a bimmer fo'sho
2011 E93 M3 - Gone
2008 E92 M3 - Gone
2006 E90 325i - Gone