[jhelmuth]

#3. Working from behind the bumper facia, find the stock plactic cover (factory vent block-off plates) and remove the single retainer clip by pusing it straight up and out of the retainer slot. You can then pull the block-off plates off the rear of the bumper facia vent opening by pulling straight back. If necessary push each individual tab to release its grip from the plate. Note the position of those tabs in the corners of the plate in the pix attached. The "inside" (toward the center of the car) top tab is quite large and this is where the retaining clip is attached. Do this to each side (passanger first, then drivers side). Removing the passagner side first will give you the experience necessary to give you an idea of what you'll need to do in much tighter quarters on the drviers side.

I've attached pix of each side removed. It is worth noting that the drivers side vent is more difficult to get to (but not impossible) as it is partially blocked by a large black plastic piece (see pix) next to, and attached to the lower radiator mount. The drivers side plate will give you the most trouble, but is not too hard if you are persistant and careful.