D12 12.1 L Diesel Engine, Engine Brake, Differential Lock, 12500 lb Front Axle, 38000 lb Rears, 3.58:1 Axle Ratio, 50350 lb GVWR, Air Ride Cab, 295/75R22.5, Air Ride Suspension, 190 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks

Cummins ISX 400ST 6 Cylinder 15.0 L Ultra Low Sulfur Diesel 400 hp Engine, 2007 US EPA Label, Air Conditioner, Cruise Control, Engine Brake, Eaton Fuller RTOC-16909A 9-Speed Manual Transmission, 12350 lb Front Axle, 38000 lb Rears, Meritor MT40-14*M AMBOID 40K Drive Axles, 50351 lb GVWR, Air Ride Cab, 61 in High Rise Sleeper Cab, Bunk Beds, Aluminum Wheels, 295/75R22.5 Front Tires, 295/75R22.5 Rear Tires, Volvo Air Ride Suspension, 215 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks

Cummins 6 Cylinder 15.0 L Ultra Low Sulfur Diesel Engine, Air Conditioner, Cruise Control, Engine Brake, Eaton Fuller RTCO-16909A 9-Speed Manual Transmission, 12350 lb Front Axle, 38000 lb Rears, Meritor MT40-14*M Drive Axles, 50351 lb GVWR, Air Ride Cab, 61 in High Rise Sleeper Cab, Bunk Beds, Aluminum Wheels, 295/75R22.5 Front Tires, 295/75R22.5 Rear Tires, Volvo Air Ride Suspension, 215 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks