i was looking at the two brothers slip on and was wondering if you have to also get a power commander or something that changes your tuning,hopefully not and does that effect your warrenty,newbie?
i have a two brothers it does have a bit of a back fire without the pc (power commander) but nothing that will affect anything! and it shouldnt affect your warranty but just to make sure ask before you bring the bike or if u do bring it in just swap the pipe it takes 5 min!
I have the 2 bros also. You dont have to do the PC, but it does make the shift points much better for the increase in air flow. Its not essential though and can be added later when you want.
