So instead of forking out $900 for a wings shorty, or $1500 for the Akra, I decided to gut my standard muffler first to see how it sounded, I figured if I didn't like it I would just buy the wings anyway. By the way, I love the look of the wings shorty. I have pics of the whole process but I didn't bring them to work with me so I will update the post tomorrow with pictures, for now just watch the video to hear the end result. <iframe width="480" height="360" src="//www.youtube.com/embed/sI41Z9HPPuM" frameborder="0" allowfullscreen></iframe> I'll post another video next weekend from off the bike so you hear what it sounds like as a spectator. This is not an easy task, in short, you have to cut either end of the standard muffler casing, then we used a press to extract the centre section from the outer casing, than used a length of 2 1/4'' perforated pipe as my new centre section, repacked with muffler packing like a motocross muffler, than weld back together. Also added new piece of stainless 2 1/4 '' pipe as the new tip to protruded through the end cap. I wouldn't bother this diy unless you or someone that's willing to help you is competent with an angle grinder, a die grinder, a press & a tig welder. I couldn't be happier with how it sounds, its actually not as loud as I was expecting, it has a really nice V-Twin note on idle and on cruise but when you load it up or give it a quick rev it has that (ducati 1098 with exhaust system) sound...really tuff but can also be subtle when you're done clowning around. I'm happy to fill in the finer details for anyone interested in doing this themselves.