Sabor, Dont quote me on this but Yosh, in it's third attempt at a Hayabusa exhaust, has geared toward **fit** and performance rather than all-out performance. I have a Micron myself not a Yosh so I do not speak from personal experiences, but I do gather quite a bit of data before I make a purchase and I think you'll find the same info....For fit and most other bikes I like Yosh, they've historically always been better, but Micron is getting the numbers. As far as the tri-oval, it is kinda cool.....
Rob