The 4 State Trucks Blog
Buyers Guide to Aftermarket Air Breather Panels
Decorative light panels are an outstanding way to start personalizing your truck. Air breather panels offer tremendous visual appeal and can elevate your big rig's nighttime appearance.
There are five main styles of air cleaner panels you can buy: Vortox, Nelson, Donaldson, Donaldson Premium, and Donaldson Preferred Fit.
The Types of Air Cleaners for Semi Trucks Explained
You can even get custom engraved air breather panels with laser-etched logos or names to further personalize your big rig.
Mo
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19th Sep 2025
A Buyer's Guide to Semi Truck Tool Box Storage
If there's one thing that a truck driver needs it's more storage space. Buying the right heavy-duty commercial truck storage boxes is one of the most useful purchases you can make.
Here are some of the best aftermarket semi truck toolboxes to improve your storage capacity while adding style to your big rig.
In this guide, we'll cover the different brands, materials, and design options you can choose from.
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12th Sep 2025
Wet Line Kits for Semi Trucks 101: The Basics Explained
Ready to transform your rig into a hydraulic powerhouse? A semi truck wetline kit can do the trick. One of these will turn your truck from a normal highway hauler into a workhorse capable of handling tasks in agriculture, construction, bulk hauling or other industries.
But if you're already running dump trailers, walking floors, or tankers, then accurately installing a wetline kit ensures solid performance and profitability. Incorrect installs can lead to thousands of dollars down the drain on r
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9th Sep 2025
Semi Truck Battery Replacement: How to Change & Maintain Semi Truck Batteries
When it comes to your semi truck’s power system, batteries are the lifeline for nearly any application, from your lighting to your hotel loads (interior appliances).
In this brief guide, we’ll cover how to swap out and maintain your commercial truck’s batteries, as well as what battery cover boxes you should buy for maximum protection.
Here’s the fastest way: disconnect the negative cables first, remove the old batteries, clean off the connections, and install a matching
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5th Sep 2025
What PSI Should Semi Truck Tires Be?
Getting the right tire inflation pressure on your semi-truck can prevent underinflation (wearing down the tires and increasing rolling resistance) and overinflation (blowout on the side of the road).
Adding the appropriate amount of air pressure to your big rig will keep you and other passerby drivers safe.
To find the correct PSI for your tires, check your owner’s manual, or find it on the commercial vehicle’s tire placard.
The number is based on various factors, like:
Weight
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29th Aug 2025