Hey guys. The elusive question. I have a 2018 Ram 3500 dually with factory rear air suspension and I have called everyone under the sun for shocks. I want to replace all 5 with the same brand. NOBODY seems to know this answer. The only thing I can assume is the factory shock with the air bags are a softer shock. Other than that I have no idea. If anyone has any ideas or has tried something please let me know.