Cummins X15 Engine with 500 HP and 1,650 LB/FT of Torque, Allison 450 RDS Transmission, 20,000 lbs. Front Axle with Air Disc Brakes, 13,500 lbs. Pusher Axle, 46,000 lbs. Rear Tandem Axle Group with Air Disc Brakes, Zinc Coated Anti Corrosion Treated Reinforced Frame Rails, Aluminum Wheels, Air Ride Drivers Seat, 90 Gallon Aluminum Fuel Tank with Heater, Stationary Grille, Power Windows, Mirrors and Locks, Load lights and MUCH MORE.