Find the best Freightliner Century 120 parts in the business here at 4 State. The Freightliner Century 120 is one of the most technologically advanced semi trucks from Freightliner, offering a smooth ride and advanced features. Like all Freightliner models, the Century 120 is well known for reliability and efficiency and with help from 4 State Trucks, you can install custom, chrome, and aftermarket parts to personalize the aesthetic of your semi truck and improve performance. Shop for bumpers, exhaust kits, fuel tanks, seating, and so much more. We have everything you need to have the Freightliner of your dreams.