When I was in the shop the last time (ignition problems, you may remember - solved now) we been chatting about sound improvements. That moment we also discussed the Librand system, including their collectors. When ordering, I assumed, that it is understood, that I wolud like to have those as well. To my disappointment, I learned, that they just ordered the portion „after“ the cat. But, fortunately, the disappointment did just last until the moment, when I turned the key. I‘m very happy with the result and may or may not change the collectors some time later.