I installed a set of Bilstein F4-BE5-A935-H0 on my 2005 FX4, and I'm not sure if I put them on correctly. There was no installation instructions, and I wasn't clear on which way the piston should go up or down? The way I have them installed is with the piston on the top, but the Bilstein stickers are upside down.
Here is a pic of them installed: