nice!>...this is one of the great things on the E63, BMW really took the time to tune it perfect at the factory...the resonance on the 6er is sooo nice...a low rumble below 2K, then gets deeper and louder..i luv the fact that at speed i can feel the exhaust rumble thru the car, let alone the growl...wind noise or not, in this car you hear the sound resonating and it gets louder with speed...brings a big to your face