1999 PETERBILT Model 377 Conventional, 63 Inch Unibilt Flat-Top Sleeper, Detroit 12.7 Liter Engine, 430-500 H.P., Engine Brake, FRO-16210 Transmission, 40,000 Lb. Rear Ends, Full Screw, 3.90 Ratio, Air Ride Suspension With Dump Valve, Hydraulic Power Steering, Air Conditioned, Aluminum Bumper, Dual Aluminum Fuel Tanks, Dual Chrome Stacks, Stainless Steel Exterior Visor, Side Fairings, Cab Extenders, Stainless Steel Quarter Fenders, Air Ride Cab, Classic Interior, AM/FM Radio, Compact Disc Player, Tilt And Telescoping Steering Wheel, Cruise Control, Heated Mirrors, Fuel Heater, Engine Block Heater, Air Dryer, Aluminum Deck Plate, Air Slide 5th, 24.5 Low Profile Tires, Aluminum Disc Wheels. XST