(15) 2001 & 2003 Mack CH612 Non-Sleeper Conventional, Mack E7 E - Tech Engine, 350 H.P., Engine Brake, RTAO-14710C-AS Transmission, 23,000Lb. Rear End, Single Axle, 3.90 Ratio, Air Ride Suspension, Dump Valve, Hydraulic Power Steering, Air Conditioned, Dual Fuel Tanks, Single Stack, Roof Air Fairing, Quarter Fender, AM/FM Radio, Compact Disc Player, Tilt and Tele-scoping Steering wheel, Cruise Control, Power Right Hand window, Adjustable 5th, 145 "" Wheel Base, 22.5 Low profile Tires, Disc wheels.