Originally Posted by kitw
I think the Sport was perfect for my E93. With the top down, it was just enough additional sound to be fun, but not enough to be overwhelming. With the Race, I'm sure it would be. That said, for an E90 or E92, I think the Sport might not be enough volume change, especially when you are hammering it, because the induction noise drowns out the exhaust over 4500 rpm or so. (from inside the car)
When you are accelerating, I think it is the intake sound that gives a bigger thrill. It's when you let off the gas that the exhaust comes into play more. That's when the rumble and burbles really make the sound of the car.