Dude, that was the 1st thing I did when I bought my 540 1 week ago. My car is maybe a little quicker but the sound is incredible. I think it is perfect. I'm the type who hates droning or loud exhaust like in say a Mustang. My car now is pretty much silent now at highway speeds but has a noticeable deep growl while starting off. Not loud and not quiet. It really sounds like a toned down Viper or something. You should check it out if you want a little more sound out of your BMW.