I never had to remove my front bumper when install the CAI. It's so long ago that I don't remember how to install it, it should be fairly easy.

btw, if you want to remove the front Bumper:

1/. Remove the 2 bolts on each side that connect the edge of the bumper to the fenders
2/.remove 2 bumper signal lamp, then look straigh in, you'll see two size 12mm hex bolts/each side, remove them.
3/.Look under you car to see if there's any cliffs holding you bumper to the underneath (mine doesn't since the bottom of the bumper broke off then I added a W-Type lip on it. Remove the cliff then gently pull&shake the bumper out.

Hope this help. It should be fairly easy.