2017 PETERBILT, 579, Heavy Duty Trucks - Sleeper Trucks, CUMMINS ISX, AMT, 2017 Peterbilt 579 Ultraloft Here is a very clean 80 Sleeper! This Ultraloft Peterbilt has a Cummins 450HP ISX Engine, 16 Speed Eaton Automatic Transmission, Mid Roof Sleeper and 2.64 rears! This truck has 630k Miles. This truck has been serviced and DOT inspected. Call, text or message Steven at, 450 Horse Power, Air Ride Suspension, Wheels, Wheel Base, , Axle, 2.64 Ratio, Mid Roof Sleeper, VIN