The ICON Vehicle Dynamics 2.5 Dual Rate Spring System for 2014 - UP Ram 2500 2013 - Up 3500 4WD levels out your truck and offers you both incredible ride quality and performance. This 2.5 dual rate spring system offers an initial soft ride zone with an aggressive second rate to help prevent bottoming out and are optimized for use on trucks equipped with diesel engines. These ICON springs have a dual stage powder coat process to help prevent corrosion and are shot peened and pre - set to prevent sagging. Front extended length shocks are required for complete installation, and we offer 2.0 Aluminum Series smooth body and Remote Reservoir or our 2.5 Series Reservoir shock with or without CDC (Compression Damping Contol) Valve. All ICON shocks are engineered to be the correct length offering maximum droop and compression travel, then tuned to work hand in hand with these springs for the best available on and offroad performance.