my uncle has a set of CCC on his, and as much as i dont like the look of the link pipe i love the sound.... deep and like a single. With the Leo vince as it came with the long DB killer in it, it sounded only slightly better than the standard, but made my bike surge more... i fitted the short DB killer and its too loud, and not a nice sound IMO. a rough harsh bark instead of a deep single sound. But ran fine with the shorter baffle in.... would rather sell up and get a set of Akras or just wait till CCC sort out the link pipe :-)