Want to turn heads, clear the lane, or just let folks know you're rolling through in style? Whether you're after the loudest train horn for your semi or just need a reliable air horn replacement, you’re in the right place. Our collection of semi-truck air horns are designed for performance, with most horns blasting at 150+ decibels of bone-rattling sound. From classic air horn kits to electric wiring or air line tubing for train horns and custom multi-tone setups, 4 State Trucks has everything you need to make your rig impossible to ignore.

Benefits of Semi Truck Air Horns

Let’s be real: stock horns just don’t cut it when you’re hauling 80,000 pounds across the country. Here’s why drivers upgrade: - Safety & Awareness: Cut through road noise and get noticed in high-traffic or blind spot scenarios. - Authority: A deep, resonant train horn commands the road like nothing else. - Style & Personality: Express your attitude with musical horns, multi-tone blasts, or custom sound kits. - Fun Factor: You’ll never get tired of the reaction when you hit that horn—especially at truck shows or rest stops.

Explore Horn Options for Every Setup

We carry: - Heavy-duty train horns for semi trucks with 3-, 4-, and 5-trumpet setups - Air horn kits with onboard compressors, air tanks, and everything needed for install - 12-volt electric train horns – ideal for budget builds or tight installs - Air horn replacements for classic rigs and newer models - Musical horns and novelty tones (yes, including "La Cucaracha" and Dukes of Hazzard themes) Our air horn kits are compatible with Peterbilt, Kenworth, Freightliner, Volvo, and more—so no matter your setup, we’ve got a horn that’ll fit right in.

Why Shop for Train Horns at 4 State Trucks?

- Trusted by real drivers, fleet managers, and show truck pros. - Full air horn kits with easy-install guides and mounting hardware. - Loudest train horns available—backed by top brands. - Competitive pricing and fast shipping anywhere in the U.S. - Real customer support from truckers who know their gear.

Make Some Noise—Shop Now

Upgrade your semi with a train horn kit that’s built to be heard—loud, clear, and powerful. Browse our collection now and find the best train horn for your semi truck today.

Common Questions Truckers Ask

What is the best train horn for a truck? We recommend brands like HornBlasters, USA Train Horns, and Grand General—all known for top-tier materials, long-lasting compressors, and LOUD results. Are train horns legal on semi-trucks? Yes—when used appropriately. Just avoid using them in areas where excessive noise is restricted (like quiet zones or residential streets at night). Always follow your local and state guidelines. How loud is too loud? Most of our horns come in around 150-155 decibels—that’s loud enough to make an impact, without risking equipment failure or hearing damage (if used responsibly).