Western Star 4800FX Constellation 6x4 prime mover. DD15Ltr Detroit, 560hp, 18speed road ranger with 1,800Ltrs of fuel. Fixed Jost greaseless turnatable, Durabrite rims, twin air in-takes and twin exhaust. Viesa bunk cooler. 46-160 @ 4.3 ratio diffs and B-Double rated