The amazing power increase required a carburetor readjustment but, and that's a big ass, they should have told you how loud it really is, it's not something you can cruise down the road with, it's sure to stop you right away As long as you have neighbors yelling in the middle of nowhere off-road where you're not disturbing anyone, and boy are you going to be impressed with the power it gives you, the noise renders it virtually useless.