I have a 2009 CVO Fat Bob . I changed the stock pipes for a set of VANCE and Hines Double barrel Q-series. I liked the looks as they kept the stock lines and the sound was great. I had it dyno tuned and got 81.3 hp and 103 torque. I was stopped a few weeks ago and was given a ticket for $109 for excessive noise. The police DB meter read 104 @ 2500 rpm. I was pissed. I now have a set of Vance and Hines Big Radius 2-1 on and am waiting for dyno time this week. I had these pipes on my softail and they were very nice.