the noise is very minimal,my gas milage went from 14 city 19 hwy to 12 city 16 hwy but i just have the 4.2l v6 and the ride is a little more bumpy but you get use to it..and the only time mine rub are when im turning real sharp like into a parking spot
No, i dont hear anything different than before. I went with the 2.5". The 3" sometimes sits the front a little higher, plus it puts everything at pretty serious angles. I dont know if your going to install it yourself, but my dad and i did it and neither of us had ever really messed with the front end before. The instructions are very clear.