June 24, 2014 by Carter @ Zone Offroad 0 Dodge/Ram PR, Press Releases2013-2014 RAM 3500 6.5″ Radius Arm System | NPA #79 Improve strength, performance, and ride quality with Zone Offroad Products 6.5″ radius arm suspension systems for 2013-2104 RAM 3500 4WD trucks. 2013 3500 6'' radius arm 6.5'' dodge ram Lift Kit Ram 1/1