CHN603, Heavy Duty Trucks - Conventional Trucks w/ Sleeper, Mack , 10 Spd, FLAT TOP, SMALL SLEEPER, TRACTOR New rear tires Aluminum wheels Engine Series AC Engine Capacity (728 CID) 12.0L Brake System Air GVWR Class 8: 33,0001Lbs and Over (RY43), Horse Power, Suspension, Wheels, Wheel Base, , Tandem Axle, Ratio, Flat Top Sleeper