For a RAM 2500, 2014-up, Carli part no. CS-DMRC-14-R1 . Rear soft coil springs, 1500 loads, 1/2-1" lift. These springs rode great until I added more weight. I went to the R2 springs. Check with Carli or C&J for your app.
In Corvallis, OR for local pickup.
Price is half of new at $240...