Akrapovic is arguably one of the premier exhaust manufacturers of motorcycle exhausts. They are so good at what they do that in MotoGP and WSBK they sometimes manufacture exhausts for teams that rebadge or are sponsored by other exhaust manufacturers.
This is not to start an argument or oversell the brand, just to let the BMW community know that this company is very good at managing exhaust flow. The build quality is exceptional. I am fairly excited that they may enter the car arena, and will look forward to what comes out.
Based on their pricing in the motorcycle arena, I would guess that this will be an upper end product in terms of pricing.