I finally got my Injen in (polished with black hoses) and put it in this morning. I did not take the bumper cover off. What I did to remove the foam was to tear up the section of foam that holds it in and it came right out. As for the plastic housing for the foam piece, I did not remove it. I just put a 2" hole on it using my hole saw. This way if it rains the filter is not exposed. Bugs and crap won't get on the filter either. The hole is pretty far up from the filter only exposing about 1" of filter. I figure this hole should supply plenty of air to the filter and to cool things down in there. I did have to remove the wheel well inner plastic liner. Took about 2.5 hours since I tried to remove the bumper for a while, then I gave up and went with the wheel well cover idea. The car sounds pretty loud with the Injen and the Greddy together. Especially when you get up to about 4K RPM's. It screams. Possibly too loud for most people. Sounds cool, though.