June 17, 2014 by Carter @ Zone Offroad 0 Dodge/Ram PR, Press Releases2014 RAM 2500 4.5″ Radius Arm System | NPA #75 Engineered to match the 2014 RAM 2500 4WD truck strength, these systems upgrade the factory front radius arms & offer great ride quality & allow 37″ tires. 2500 coil spring dodge ram Lift Kit radius arm Ram 1/1