2016 PETERBILT 579 Mileage: 518,000 mi Description 518k miles. Cummins 450hp motor, 10 speed trans, 2.47 rears, low pro 22.5s, all aluminum wheels. Really nice truck has APU unit, electric windows and locks, all the usual bells and whistles. Engine Horsepower: 450 HP Engine Manufacturer: CUMMINS Engine Model: ISX15 Powertrain Number of Speeds: 10 Spd Ratio: 2.47 Chassis Suspension: Air Ride Number of Rear Axles: Tandem Wheels: Aluminum Interior Drive Side: Left Hand Drive Located In: Overton, Texas