2021 Peterbilt 579, Cummins, X15, 450HP, Eaton Fuller 12 Speed Endurant Transmission, Sleeper, , , Stock # 1774026 2021 Peterbilt 579 Ultraloft 80" Double Bunk Sleeper. Cummins X15 with 450 Horsepower. Eaton 12 Speed Automated Endurant Transmission. Battery Powered APU. Virgin Rubber- $59,977 Price does not include state and local taxes; tags; registration or title fees; dealer-imposed fees, including document preparation, processing or servicing fees, or any optional equipment or upfitting work selected by buyer. Valid while supplies last. Images shown may not reflect actual vehicle.