Improve performance and reliability with semi truck exhaust parts. Upgrade your truck’s exhaust system today— and enjoy fast, reliable shipping.

Universal semi-truck seats are designed to fit most Class 6, 7, and 8 trucks including Freightliner, Peterbilt, Kenworth, Volvo, Mack, and International models from 1990 to present.

Universal semi-truck horns are designed to fit most Class 8 trucks including Peterbilt, Kenworth, Freightliner, Volvo, Mack, and International models from 1990 to present.

Sep 23, 2025 · What is a Speed Sensor in a Semi Truck? Basically, the speed sensor monitors the rotational speed of the wheels, converting the motion of the wheel into an electronic signal which is …

Browse through half-tandem truck fenders with various widths and gauge thicknesses, finishes, and style designs to perfectly customize your Class 8 truck. Filter for your make/model, whether it’s a …

Ready to shop for our newest semi truck product inventory to date? Check out our new semi truck products and tools!

Customize your shifting experience with semi truck custom shifters. Shop auxiliary shift kits, gear shifters, air shifter assemblies, and mounts built for precision and control.

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, …

Most of our semi truck cab lights are made for universal fitment. That means they work with just about any Class 8 truck—Freightliner, Kenworth, Peterbilt, Western Star, and more.

Ensure your rig runs cool with our range of semi-truck engine cooling parts at 4 State Trucks. Discover new radiators, fans, and coolant systems for your truck, whether you need a quality replacement or a …