I've not yet had the opportunity to listen to the Accufab exhaust - which as we all know is essentially a "muffler delete" system. The "big block Can-Am car under full tilt" description makes it sound like it is essentially the same as the Ford Racing Rear Exit Exhaust (headers, not cats, very small collector-mufflers", which I have. The curious part for me is that the Ford Racing exhaust has absolutely no drone - anywhere in the rpm range. Under normal cruise or very moderate accelerations for freeway hills, the exhaust is fairly quiet - almost eerie considering how loud it gets with mid to full throttle applications.
I applaud Accufab's system and their competitive price point. It would be great if there could be some additional tuning to eliminate/mitigate the drone. (I suspect it is also theere on the Ida exhaust as well, although it is not talked about so much.)