Yep, bumper needs to come off.
Actually it's the lights, bumper, partially the undertray - propabley need modding after you installed the FMIC, water reservoir, one tow hook, air con pipes need to be bent back, the fan, that sits right behind the bumper - if you got it. If I forgot something, I'm sorry
Took me and a friend 4 hours to take everything apart and fit the FMIC. And took me 6 hours (!) to get everythong back together - but I was alone and had to take the bumper on and off like 100 times, b/c I wanted the keep the plastic undertray in the frontbumper and had to make it fit over the fmic. And it took me forever to do the two screws where the bumper and the fender meet since the bolts on the bar broke off and I used normal screws.
Otherwise, this should be a 2 hour job.
So altogether you'll be looking at a 6 hour job.
By the way: I got a autobahn88 FMIC kit.