Got my expansion pipe and air cleaner in the mail today. Of course I had to pop it on and go for a ride! It fit my bike very easy, another quality part from sick bike parts! I can not say enough good stuff about these guys!
I did both the pipe and the air cleaner at the same time, so I can not say which improved it more, but man! It feels GREAT out of the box. Even with no tuning, it just revs so much faster, and pulls a lot harder on the bottom and mid range. I do not think I will tune the pipe at all, just leave it where it is and make sure the jet is dialed in. I ordered the muffler as well because I like to be fairly stealthy (rolling at 45 LOL!), but I do not think it is really needed. Because it exits farther back it sounds quieter to me. I love the look, flat black with a sexy brushed aluminum tip!
I have a welder friend, and will weld up the main coupler and fab a better mount for sure. I rook it for a 10 mile spin tonight, it hits 40+ easy, and seems to get there much more quickly!
To me this is nearly the ultimate happy time setup, and certainly all I need for a solid rider around the Island. The only thing I would consider as better is a Nuvinci hub. That may be in the future as well.