I've been running a Beowulf de-cat pipe and titanium can for a year and love the improved mid-range and massive weight saving but have found the silencer very noisy. Last week I contacted Beowulf to see if they have quieter baffles, not expecting a positive response. In fact Carol, their customer services lady, immediately came back to me, not only offering a quieter baffle but offering to send it to me completely free of charge! Brilliant customer service and the new baffle is great. The exhaust is quiet but with a lovely rasp under acceleration. The low rev chugging that was a feature of the open baffle is gone and although the mid-range lacks some of the immediacy that the more open baffle offered, overall it's a much more refined setup that doesn't make me cringe every time I ride through one of the many pretty villages round where I live!