For the new B6, BMW tuner Alpina went to the prestigious Russian firm Akrapovic for the exhausts. The system they devised for the convertible 6er is the titanium version which is significantly lighter than the stainless steel sets. Apart from the weight, these exhausts also have a profound effect on performance, and of course the noise. The video after the jump, announcing Alpina and Akrapovic partnership, tells you more about it.