At 4 State Trucks, you can upgrade the style of your rig with semi truck rear fenders. We offer a range of options from top brands like Hogebuilt, Merritt, and Minimizer, as well as budget-friendly choices …

Shop for semi truck air fittings, hoses, and connectors to stop leaks, replace broken lines, rebuild a trailer air setup, and find quick-connect fittings with ease.

Your semi truck’s exhaust system does more than just move fumes out of the engine—it plays a huge role in performance, emissions control, and style. That’s why we carry a massive selection of heavy …

Find reliable aftermarket upgrades and replacement components that are make-model specific, whether you need Kenwoth W900 truck parts or T680 replacement parts, we have your make/model-specific …

Check out the best semi truck air horns over at 4 State Trucks. Whether you're into powerful train horns or sleek dual-tone options, we've got you covered for loud, reliable performance.

If you’re a fleet maintenance manager or a heavy-duty diesel mechanic, our extensive lineup of semi truck tools has just what you need. We also stock a wide array of universal tools and accessories for …

4 State Trucks offers a wide selection of top products designed to keep you rolling smoothly when it comes to your semi-truck fifth wheel replacement and accessories.

4 State Trucks carries the best new semi truck parts for Peterbilt, Kenworth, Freightliner, International, and more.

Will a CSM bumper fit my specific truck model and year? CSM bumpers are designed for specific truck models and years. Most commonly, they fit Peterbilt 379 (1987-2007), Peterbilt 389 (2008-present), …

Shop durable semi-truck mud flaps at 4 State Trucks. Protect your rig with custom, logo, and universal options built for heavy-duty performance!