The 4 State Trucks Blog
Peterbilt vs Mack: Choosing Between Rugged or Classic Styles
Let’s do a quick breakdown of Mack trucks vs Peterbilt trucks.
Mack is naturally the cheaper, more affordable truck to buy.
Peterbilt models come at a premium price point, but they're also packed with a rich array of driver-friendly features and plenty of cab space.
Pete trucks are also notorious for letting owners completely customize their base builds with thousands of aftermarket Peterbilt truck accessories and upgrades to choose from.
It makes sense. Peterbilt trucks are famous f
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2nd Jan 2026
The Ultimate Guide to DPF Filters & DEF Systems on Semi Trucks
Let’s break down how to maintain peak emissions performance and avoid excessive repairs.
In this guide we’ll cover the various Diesel Exhaust Fluid (DEF) and Diesel Particulate Filter (DPF) products and their functions, from gaskets and clamps to slipcovers.
DPF and DEF systems aren’t related in any way. But they’re both critical aftertreatment systems for toxic exhaust emissions on a big rig.
Diesel Particulate Filters: The History, The Controversy
Before 2003, th
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30th Dec 2025
How to Choose the Best Refrigerator for Your Semi Truck
Every OTR truck driver needs reliable cooling for food and beverages on long haul drives.
That's where semi truck refrigerators come in handy.
When it comes to buying this must-have accessory, what's the best option to spend your money on?
3 Things to Look for in a Semi Truck Fridge
Before buying, weigh these practical factors:
Power usage & efficiencyHow well it runs on 12V without draining your batteries.
Budget price pointUpfront cost versus long-term reliability and power s
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26th Dec 2025
Haul of Fame: Inside Ivyâs Poison â The Wild 1986 Peterbilt 359 That Refused to Die
If you hang around truck shows long enough, you start hearing the same names over and over. Some are people. Some are companies. And a rare few are trucks.
Ivy’s Poison is one of those trucks.
This chopped, dropped, tribal-flamed 1986 Peterbilt 359 is the kind of ride that makes people stop mid-sentence and go, “Wait… what is THAT?” Built with serious love, serious parts, and a whole lot of attitude by Chrome Shop Mafia and the crew at 4 State Trucks, this rig is old-sch
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19th Dec 2025
The Ultimate Guide to Custom Semi Truck Upholstery (Everything You Need to Know)
Almost any custom show truck prioritizes quality interior upholstery material and stitch design, be it vinyl, premium leather, or cloth.
Let's dig into some of the aftermarket semi truck upholstery designs that you can use when customizing your interior sleeper cab space.
Are Custom Semi Truck Upholstery Upgrades Worth the Price Tag?
Like anything else that's custom-made, it can enhance the resale value of your truck and completely personalize the overall look and feel.
Yup. It&rsqu
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16th Dec 2025