Jon, if you look at the PMF website, they list the Bilstein 5100 model number that they will sell as optional equipment their RSK kits. (Could check the ORU and SKY sites too - I think they all offer Bilsteins). May be the older part numbers so you may have to cross reference to the new part number. When I put my 2" leveling springs on my F350, I ordered out the Bilsteins that PMF recommended with their 2.25" RSK. You can look up the model number on the Bilstein site to see collapsed and extended lengths of the shocks once you have that model number in order to double check before you buy. I didn't buy the shocks from PMF BTW as there are cheaper places to purchase them - just looked at their site to see what they recommended with the 2.25" RSK. I had stock height Bilstein HD (Blue/Yellow) shocks on the front of my truck before the leveling springs, and when I checked lengths, they were too short with the lift. Todd