Paccar MX-13, 510 Hp, Jake, FRO 16210C Manual Transmission, 40000# Rears, 3.70 Ratio, Air Ride Suspension, Hydraulic Power Steering, AC, Aluminum Bumper, Dual Aluminum Fuel Tanks, Tilt and Telescoping Steering Wheel, Cruise, Power Window, Air Slide 5th Wheel, 216" WB, 22.5 Low Profile Tires , All Virgin Rubber! 2 Matching 631k miles and 527k Miles