Per prototype road number: large and small Sinclair antennas, mirrors and wind deflectors, dynamic and radiator fans, MU stands
Illuminated ditch lights
Spare knuckles on rear pilot
In 2014, CSX traded all 12 of their remaining SD80MAC units to NS in exchange for a group of former Conrail SD40s (rebuilt to Dash-2 standards). Instead of being repainted, the new SD40s simply received CSX logos on the nose and hood, along with new road numbers, giving them a “patched” appearance.