There are many ways to install the CAI, and I don't think it matters too much which brand you have. MS recommends to remove the driver side front wheel, but doesn't say to remove the bumper. Injen says to remove the bumper, but nothing about the wheel. In reality, you don't even have to do either; I actually installed my MS CAI without removing the front bumper and without removing the wheel. Just depends how patient you are, and how concerned you are about messing something up. Both jacking the car and removing the bumper obviously have potential complications.
So...do what you are comfortable with. I think most would recommend to remove the wheel, and leave the bumper in place.