oh & to the Busa guy that claims slip--ons are no account you are totally clueless.... A well designed slip-on can add more performance than many full systems. IN fact on the RC51 the Sato exhausts actually give more overall performance than ANY other exhaust slip-on or full system we tested & the gains are in the mid-range where it is most beneficial. Most full systems like Akrapovich concentrate on peak horsepower numbers & HP is always a trade off so they sacrifice mid-range or lowend performance to get peakier numbers, but how often do you really ride around with the throttle wide open & the bike bouncing off the rev limiter??? Very rarely I bet... You use the mid-range performance of the bike all the time in daily riding.
Many of the OEM headers nowdays are built very well so well in fact that choosing a full system over slip-ons typically produces only a few more horsepower at best. What you get for your money in most cases is droping a few more lbs than you pick up in horsepower which makes slip-ons a very viable bang for the buck on almost all the current sportbikes.
Sato Slip-on vs Stock dyno chart
