2021 PETERBILT 579 UltraCab Conventional, 80 Inch Unibilt High Roof Sleeper, Cummins X15 Engine, 450 H.P., Engine Brake, FAO(F)-16810C Transmission, (Manual), 40,000 Lb. Rear Ends, 3.08 Ratio, Air Ride Suspension, Hydraulic Power Steering, Air Conditioned, Dual Aluminum Fuel Tanks, Horizontal Exhaust, Stainless Steel Exterior Visor, Side Fairings, Cab Extenders, Quarter Fenders, Bunk Heater, Tilt And Telescoping Steering Wheel, Cruise Control, Power Windows, Refrigerator, Air Slide 5th, 236 Inch Wheel Base, 22.5 Low Profile Tires, Aluminum Disc Wheels.