Keep air systems tight and reliable with semi truck air line hoses and fittings. Shop coils, repair kits, and hardware built for leak-free performance.

Explore thousands of accessories and semi truck parts made to fit your Freightliner truck. Our in-stock heavy-duty truck parts for Freightliner models offer a warranty-backed, reliable and incredibly …

From fleet workhorses to fully customized show trucks, we’ve got the truck lighting you need to elevate your Volvo. 4 State Trucks is the trusted source for quality lighting parts that blend safety, durability, …

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 …

Whether you're seeking semi truck exhaust pipes, clamps, reducers, couplers, or sleek exhaust tips, we've got you covered with durable products from leading manufacturers like Dynaflex and Lincoln …

Shop our clearance sale at 4 State Trucks for unparalleled savings on essential semi-truck parts! It's the perfect opportunity for truck owners to upgrade or maintain their fleet while saving.

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

Discover superior Peterbilt 379 aftermarket truck parts and accessories. Shop rear fenders, exhaust stacks, and bumpers now!

Shop heavy-duty semi truck bumpers built for strength, style, and road protection. Find chrome and steel bumpers designed to fit Class 8 trucks and stand out.

Accidents can cause a lot of complicated damage to semi-trucks, potentially requiring a lot of replacement parts in order to restore your big rig. 4 State Trucks has got you covered with our large …