Tough jobs call for tough trucks. And when your Western Star needs parts, you want upgrades that can keep up. Whether you're driving a 4700 series, 4900, or the sleek 5700XE, we’ve got the aftermarket parts to match your truck’s power and personality.

Why Buy Aftermarket Western Star Parts?

- Save money over OEM without sacrificing quality - Upgrade performance with improved durability and function. - Customize your rig inside and out for comfort, style, or branding. - Stay DOT-compliant with lighting, mirrors, and safety upgrades. These parts aren’t just about replacing the old stuff. They’re about boosting what your truck can do—and how good it looks doing it.

Get the Job Done—And Look Good Doing It

We carry Western Star exterior and interior parts built for hard-working trucks. From rugged bumpers to stylish chrome trim, our components are designed to perform under pressure—and turn heads while doing it. Need replacement parts to stay road-ready? We’ve got them. Want to customize your ride with aftermarket accessories that reflect your brand? You’ll find those here too.

Built for Fleets, Shops & Owner-Ops

Whether you’re wrenching in your shop or managing a fleet, 4 State makes it easy to shop Western Star truck components. Our inventory fits a wide range of models and job needs—from long-haul comfort upgrades to workhorse body parts built for logging, oilfield, or construction routes. We stock: - Cab and sleeper parts. - Engine and performance components. - Lights, visors, fenders, hoods, grilles, and more.

Let’s Get You Back on the Road

We know downtime costs money. That’s why we make it easy to shop Western Star parts online—fast shipping, expert support, and a huge selection of heavy-duty commercial truck parts ready to roll. Ready to make your rig better than new?