I wonder if it lost bottom end without the back pressure of the 2 mufflers. Honda designed the exhaust for a specific sound at low and high rpm. Hence the reason the right muffler has a smaller capacity than the left. Coincidently, the swingarm is on the right which takes up some room and the smaller muffler was ideal on that side. Who knows, that actually might be the reason of the two different sizes. The two cats might provide enough back pressure anyways. A nice turn down and slight outward tip painted matte black might be just the right look. Please upload sound clips. I haven't found company making an aftermarket exhaust for the F6C yet. What is the diameter of the pipe end - 2"?