Zone Offroad 2014–2018 Ram 2500 6.5‑inch lift system entry notes a diesel‑oriented package for those model years and specifies the stated 6.5" lift height. The description provides the vehicle‑specific components required to implement that lift on compatible Ram 2500 diesel models when installed following Zone Offroad guidance.
Zone Offroad 14-18 Ram 2500 6.5in Lift System - Diesel