Hayabusa2005
Registered
I have done a lot of research on this board and the net and have found the Tsukigi full exhaust and Brocks Full Exhaust (Alien, Megaphone, etc) seem to produce the most gain in hp on the dyno. I have read some posts where people have switched from Yoshi to Brocks or Tsukigi and see huge gains. Why would there be that big of a difference in these pipes in performance on the dyno?