^^^^ Like blaster said but, it can make it feel like you have more power even though you don't because when it comes on quicker you think ohh wow I got more power,, but then it will drop off sooner.. Or when you want it later it seems to hit a little harder.. On mine it seems to hit a little quicker and that's good for the trails that little xtra mid range. Some don't feel a difference at all and say it dropped power. Different engines, different riders, different needs. Kind of like different pipes suit different rider preferences. All in all there like 15$ and easy to install see if you like it if not, than its not a big waste of $ .. Best part is there Billet and they look nice.