Just had a 18" Wicked Flow muffler installed today. I went in to get pricing information for a Magnaflow, and the owner told me about the Wicked Flow. I had never heard of it until earlier today. He said that it's basically the same thing as a Magnaflow but just not nearly as well known. He also said that they seem to last longer. I enjoyed the exhaust on the way home. It has a fairly loud but really deep sound. Does anyone else have anything from Wicked Flow? I cannot really say anything about the drone in the cab at this point because I have not driven the truck long enough. Early on it seems as if the drone is a little loud at low rpms when accelerating, but once you hit 1500 -2000 it drone goes down quite a bit.