I used Plenum's walk through in prep for installing the factory third radiator kit on my 2013 991.1. It was fantastic, thought I ran into a few quirks along the way. One thing that is not covered in detail is the headlight removal process. I created a couple of pictures and a small set of instructions here: bumper removal instruction addendum . Hopefully that helps out someone who may have encountered the same confusion I did. Thanks again Plenum!