These FOX Performance Elite Series 2.5 reservoir rear shocks are for 2014+ Ram 3500 4WD with 0–1.5" lift and include adjustable damping and an external reservoir. FOX states the Elite Series uses race-derived technology with vehicle-specific valving, black anodized CNC components, and an external reservoir to dissipate heat. They are presented as application-tuned coilover shocks for improved ride and damping control on the specified truck.
Fox 2014+ Ram 3500 4WD 0-1.5in Lift Rear Performance Elite Series 2.5 Reservoir Shocks - Adjustable