I have not got to ride it yet. I wish i would have dynoed it but my dyno computer craped out on me couple days ago. You guys can understand i was to exited to wait, but i can tell you the factory silencer is pretty restricted. It has two 1 5/8 in and a crazy setup inside then comes out to a single 1 5/8 outlet. Its lighter than the factory setup for sure . The factory head pipes are plenty big enough for this engine at 1 5/8. My y pipe is two 1 3/4 pipes into a 2 inch pipe through a 2 inch 18inch super trapp. I am well pleased with it and can control the sound to what i like. I still need someone to sell a efi tuner !!!!!!!!!
A super trapp is a universal muffler for any thing you want to install it on. They make a few direct fit applications for bikes. Just google super trapp exhaust. I've had them on many projects and love them. Plus you can adjust the sound . More disk more power more sound. Less disk less power less sound basically .