Weird the ad I read on Amazon says the 1405 is 2.5" thick.
Nevermind, the one I read was a Hayden OC-1405.
Either way the 1405 is bigger than my 1404. Its taller at least. I personally wouldn't recommend doing it without removing the bumper cover. Removing it really isn't that bad.
Take out the headlights. Remove the 5 plastic pins that attach the top of the cover to the core support. There are 6 7mm bolts to come out of the splash guard on each side, 2 of which are actually on the bottom of the cover. 2 bolts that go through the bumper cover into the fender. 1 nut that in the same area. There are 4 (I think) plastic pins that come out of the bottom of the center of the cover and its ready to pop out
If you have to take the header panel off there are 6 total bolts holding it on.
Its really not that hard, and you will end up thanking yourself for the extra room you have.
