Upgrade your Freightliner M2 Business Class to show off your personality with a new horn or train whistle. Here at 4 State Trucks, we carry a large selection of horns, train whistles, and accessories to make sure you find a horn that fits your style. Shop for horns, train whistles, trumpet horns, mounting kits, covers and so much more to turn your Freightliner into a one-of-a-kind semi truck.
