Find top-notch FLC 120 Set Back Axle safety, air, and electrical parts that meet your safety standards with aftermarket and custom parts and accessories from 4 State Trucks. We carry a large selection of any safety, air, and electrical parts you might need to keep you and your semi truck safe while on the road. Find airlines and airline boxes, electrical cords, roadside gear, safety flags, and more at 4 State Trucks to keep your Freightliner FLC 120 SBA operating at peak performance.