Following with interest! Had a chance to test ride a Vitpilen 701 with Akrapovic slip-on (with DB killer) at an event. The sound was in my opinion a tiny bit better than my stock muffler, but not worth the $850. The Husqvarna representative promised a much better sound with the DB killer removed. Considering the little difference between stock and Akrapovic with DB killers, it would be really interesting to hear the stock muffler without DB killer.