Cummins ISX12 (425 HP), Engine Brake, Allison Automatic Transmission, 23,000# Single Rear Drive Axle, Locker, Air Ride Suspension w/ Dash Deflate Switch, 12,350# Steer Axle w/ Power Steering, 11R22.5 Tires On Aluminum Wheels, Cam Style Drum Brakes, (1) L/H Side 50 Gal. & (1) R/H Side 56 Gal. Frame Mounted Aluminum Fuel Tanks(w/ Selector Switch @ Dash), L/H Side Frame Mounted Poly DEF Tank, R/H Side Upright Exhaust w/ Straight Chrome Stack & Factory Installed DPF, Stainless Steel Visor, Factory Air Ride Day Cab, Aluminum Full Fenders On Drive Axle, Fixed 5th Wheel, Air Ride Driver's Seat, Tilt & Tele Steering Column, Power Windows, Heated Mirrors, A/C, Cruise Control, Gauge Package, Concert Class AM/FM Radio w/ CD Player/Aux/USB/BlueTooth...