This 2027 Peterbilt 579 UltraLoft is built for fuel-efficient long-haul performance and driver comfort, featuring an 80" UltraLoft sleeper with a Prestige Interior in Sterling Gray and a double bunk setup with ladder. Powered by a Cummins X15 Efficiency Series engine rated at 450 HP and paired with an Eaton Endurant automated 12-speed transmission, this truck delivers smooth shifting, dependable power, and efficient highway performance. It rides on a 13,200 lb front axle with 40,000 lb rear tandems, low air leaf suspension, and 3.08 rear gearing for a smooth, stable ride. Front air disc brakes and rear drum brakes provide reliable stopping performance, while adaptive cruise, Bendix Fusion Stop and Auto-Go, predictive cruise control, and the EPIQ Aero package help support safety and fuel economy. Dual 120-gallon aluminum fuel tanks provide excellent range between stops. Inside, drivers will appreciate the refrigerator, fuel-fired sleeper heater, TV provisions, Bluetooth, USB ports, dual USB charging, 1800W inverter with shore power, 15" digital display cluster, standard cab and sleeper speakers, and a comfortable 80" UltraLoft layout built for productivity on the road. Painted aero fairings, body-color mirror housings, painted composite sunvisor, and clean aerodynamic styling make this 579 UltraLoft ready for efficient over-the-road work. Call or stop by one of our Allstate Peterbilt sales locations in South St Paul, Eau Claire, Rochester or Fargo.