I like my "LIP" on my Crossfire. I paid $40.00 for it, plus about $12.00 or so for 3M body tape and screws. I did mod the lip to fit by cutting a "V" shaped notch in the lower middle part of the lip that lets it curve to fit the XF. I attached with screws in three places on each side of the front. The tape just held the lip up in position so I could put the screws in and it keeps the lip tight to the bumper. I think it looks good, works well. I did not paint the "LIP" as my car is black, but put vinyl dressing on it to give it a little shine. This was a low cost easy mod to make. Most of all I like it. There were several post I made with pics, if you car to look it over. I have had the car up to 110MPH to make sure there would be no body tear away problems. Anyway, if you like it great and if not that is great too!