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What Is DEF on a Semi Truck? Fluid, Filters, Problems & Maintenance(Post)
What Is a DEF (Diesel Exhaust Fluid) Filter? A DEF (Diesel Exhaust Fluid) filter protects the SCR (Selective Catalytic Reduction) system by removing dirt, debris, and contaminants from the DEF supply
How A/C Driers Work on Your Semi Truck(Post)Ever wondered why your semi truck’s AC runs smoothly, or why it suddenly stops working? Your A/C receiver, drier, or accumulator is the unsung heroe of your commercial vehicle. Maintaining your A/C d
Buyers Guide to Aftermarket Air Breather Panels(Post)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
Seasonal Semi Truck Maintenance Checklist(Post)Freezing winter weather temperatures, heavy snow, ice, and road salt take an unseen toll on your semi truck. Corrosion directly affects your semi truck brakes, electrical terminals, suspension mounts
What Does the FASS Fuel System Do? (Post)Diesel fuel often contains air, vapor, water, and fine debris - harmful contaminants that hurt fuel pressure stability, injector life, and injection pump health. FASS (fuel air separation system) help
5 Unique Lug Nut Cover Styles to Give Your Truck a More Polished Look(Post)Semi truck lug nut covers aren’t just useful in protecting your lug nut and wheel studs, but they’re a great way to achieve a more polished, cleaner look at a low-cost. Here are some of the coolest-l
Preventative Maintenance Checklist for Semi Trucks(Post)In this post, we’ll cover the need for a semi truck preventative maintenance checklist, and some of the common replacement parts you can buy online and ship directly to your specified address. Key Ta
Signs of a Failing Heater Box & What to Do About It(Post)Experiencing refreshing cool air in the summer and warm air in the winter is nearly priceless when behind the wheel of a big rig for 11 hours a day. However, if your A/C heater box isn’t working, your
Semi Truck DPF Systems: How They Work, Problems, Regeneration & Parts(Post)Let’s break down how to maintain peak emissions performance and avoid excessive repairs on big truck exhausts. Key Takeaways DPFs trap soot, while DEF reduces harmful nitrogen oxide emissions. Watch
What Year Did Semi Trucks Get DPF Systems?(Post)When Did Semi Trucks Start Using DPF Systems? EPA Rules Explained Diesel particulate filters (DPFs) became standard equipment on new U.S. heavy-duty diesel trucks starting with the 2007 engine model y
Diesel Truck Engine Maintenance Guide(Post)Semi truck engines can last up to one million miles, or more, before they need to be rebuilt or replaced. During their lifespan, engine system parts experience a lot of heat and pressure, eventually
Spring Semi-Truck Maintenance: 5 Checks to Prevent Expensive Repairs(Post)Winter weather causes corrosion, contamination, wear, and hidden damage. Spring is a great time to inspect the truck thoroughly and stop small problems from becoming giant disasters. Five Spring Main
How to Buy the Right Peterbilt 379 Radiator(Post)If you want to keep your diesel engine from overheating you need a well-functioning replacement Peterbilt radiator to properly carry the hot coolant through small passages, transfer engine heat into t
Why Drivers Trust MHC Kenworth for Uptime, Service, and Long-Term Support(Post)MHC Kenworth doesn't just sell heavy duty trucks and truckp parts, it prides itself in having the largest Kenworth dealer network, 130+ service locations across 19 states, 50 years of industry experie
Best Semi Truck Emergency Kit Accessories to Deter Roadside Breakdowns(Post)It’s cold, and late, and you’re suddenly stalled at the side of the road because your semi truck won’t start or won’t budge. If this sounds like a truck driver’s worst nightmare, it’s because it is.
What are Semi Truck Winter Fronts?(Post)A semi-truck winter front is a heavy-duty, weather-resistant cover designed to mount directly over a truck’s front grille. Typically manufactured from reinforced vinyl, canvas, or quilted fabric, it s
Wet Line Kits for Semi Trucks 101: The Basics Explained(Post)Ready to transform your rig into a hydraulic powerhouse? A semi-truck wet line kit can do the trick. One of these will turn your truck from a normal highway hauler into a workhorse capable of handlin
How to Winterize a Semi Truck: The Complete Driver Checklist(Post)Cold winter weather, freezing temperatures, snow-covered roads, and adverse weather conditions wreak havoc on semi truck engines and equipment, and can lead to costly repairs if damage occurs. Don’t c
Spare Semi Truck Parts Every Owner-Operator Should Keep(Post)For owner-operators, having the right spare parts on hand is the difference between experiencing devastating downtime and productive uptime. You don’t want to be caught on the side of the road waiting
What are the Most Frequently Replaced Semi Truck Parts?(Post)The parts of a class 8 truck that see the most frequent repair and replacement are areas where tons of heat, friction, and pressure occur. No-brainer, right? Here are some of the most frequently repl
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FREE SHIPPING OVER $249
Cab Fresh Filter Only For Freightliner Cascadia, Century, Columbia & Coronado
CAB FRESH FILTER CO.
$17.91Cab Fresh Filter Only Fits FreightlinerFind your Cab Fresh Replacement Filter at 4 State Trucks. The highly effective filter is made with a primary layer and charcoal layer that traps and eliminates...03-091306- SKU:
- 03-091306
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Material Options:
- Cloth
- Make:
- Freightliner
- Product Type:
- Exterior
$17.91Qty in Cart: 0Price:$17.91Subtotal: -
FREE SHIPPING OVER $249
Black Plastic Cab Fresh Filter For Freightliner Cascadia, Century, Columbia & Coronado
CAB FRESH FILTER CO.
$51.99Cab Fresh Filter Fits FreightlinerReplace your original filter with this cab fresh filter with a charcoal spor-ax antimicrobial layer. This charcoal layer has adsorption properties that help capture...03-091305- SKU:
- 03-091305
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Material Options:
- Plastic/Poly
- Make:
- Freightliner
- Color:
- Black
- Product Type:
- Exterior
$51.99Qty in Cart: 0Price:$51.99Subtotal: -
FREE SHIPPING OVER $249
Cab Fresh Replacement HVAC Pre-Filter For Peterbilt & Kenworth
CAB FRESH FILTER CO.
$14.27Air Filter HVAC Pre-FilterKeep your HVAC system running clean and efficient with this replacement pre-filter designed to fit inside the existing housing assembly. It helps capture dust, debris, and...29-091301- SKU:
- 29-091301
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Make:
- Peterbilt
- Make:
- Kenworth
- Ready To Ship:
- Yes
- Product Type:
- Interior
$14.27Qty in Cart: 0Price:$14.27Subtotal: -
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Cab Fresh HVAC Pre-Filter W/ Black Housing For Peterbilt & Kenworth
CAB FRESH FILTER CO.
$50.99Air Filter HVAC Pre-FilterHelp protect your cab's HVAC system with this complete pre-filter assembly featuring a durable housing and replaceable filter element. Designed to capture dust, debris, and...29-091300- SKU:
- 29-091300
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Make:
- Kenworth
- Make:
- Peterbilt
- Product Type:
- Engine Parts
- Ready To Ship:
- Yes
$50.99Qty in Cart: 0Price:$50.99Subtotal: -
3 Layer Replacement Air Filter Wrap For 29-071300033 High Performance Air Filter
FLEET FILTERS
$195.993 Layer Replacement Air Filter Wrap For High Performance Air Filter* High Quality Replacement Air Filter Wrap* For 29-071300033* 3 Layer Design* Does Not Come Pre-Oiled* Oil Is Required Before...29-071300035- SKU:
- 29-071300035
- Truck Class:
- Heavy Duty
- Make:
- International
- Product Type:
- Engine Parts
$195.99Qty in Cart: 0Price:$195.99Subtotal: -
3 Layer Replacement Air Filter Wrap For 29-071300044 High Performance Air Filter
FLEET FILTERS
$112.993 Layer Replacement Air Filter Wrap For High Performance Air Filter* High Quality Replacement Air Filter Wrap* For 29-071300044* 3 Layer Design* Does Not Come Pre-Oiled* Oil Is Required Before...29-071300045- SKU:
- 29-071300045
- Truck Class:
- Heavy Duty
- Make:
- Freightliner
- Product Type:
- Engine Parts
- Ready To Ship:
- Yes
$112.99Qty in Cart: 0Price:$112.99Subtotal: -
3 Layer Replacement Air Filter Wrap For 29-071300042 High Performance Air Filter
FLEET FILTERS
$112.993 Layer Replacement Air Filter Wrap For High Performance Air Filter* High Quality Replacement Air Filter Wrap* For 29-071300042* 3 Layer Design* Does Not Come Pre-Oiled* Oil Is Required Before...29-071300043- SKU:
- 29-071300043
- Truck Class:
- Heavy Duty
- Make:
- Kenworth
- Make:
- Peterbilt
- Product Type:
- Engine Parts
$112.99Qty in Cart: 0Price:$112.99Subtotal: -
3 Layer Replacement Air Filter Wrap For 29-071300022 High Performance Air Filter
FLEET FILTERS
$195.993 Layer Replacement Air Filter Wrap For High Performance Air Filter* High Quality Replacement Air Filter Wrap* For 29-071300021* 3 Layer Design* Does Not Come Pre-Oiled* Oil Is Required Before...29-071300023- SKU:
- 29-071300023
- Truck Class:
- Heavy Duty
- Make:
- Sterling
- Product Type:
- Engine Parts
$195.99Qty in Cart: 0Price:$195.99Subtotal: -
3 Layer Replacement Air Filter Wrap For 29-071300027 High Performance Air Filter
FLEET FILTERS
$195.993 Layer Replacement Air Filter Wrap For High Performance Air Filter* High Quality Replacement Air Filter Wrap* For 29-071300027* 3 Layer Design* Does Not Come Pre-Oiled* Oil Is Required Before...29-071300029- SKU:
- 29-071300029
- Truck Class:
- Heavy Duty
- Make:
- Mack
- Product Type:
- Engine Parts
$195.99Qty in Cart: 0Price:$195.99Subtotal: -
3 Layer Replacement Air Filter Wrap For 29-071300039 High Performance Air Filter
FLEET FILTERS
$112.993 Layer Replacement Air Filter Wrap For High Performance Air Filter* High Quality Replacement Air Filter Wrap* For 29-071300039* 3 Layer Design* Does Not Come Pre-Oiled* Oil Is Required Before...29-071300040- SKU:
- 29-071300040
- Truck Class:
- Heavy Duty
- Make:
- Freightliner
- Product Type:
- Engine Parts
$112.99Qty in Cart: 0Price:$112.99Subtotal: -
3 Layer Replacement Air Filter Wrap For 29-071300018 High Performance Air Filter
FLEET FILTERS
$195.993 Layer Replacement Air Filter Wrap For High Performance Air Filter* High Quality Replacement Air Filter Wrap* For 29-071300018* 3 Layer Design* Does Not Come Pre-Oiled* Oil Is Required Before...29-071300020- SKU:
- 29-071300020
- Truck Class:
- Heavy Duty
- Make:
- Volvo
- Product Type:
- Engine Parts
$195.99Qty in Cart: 0Price:$195.99Subtotal: -
3 Layer Replacement Air Filter Wrap For 29-071300030 High Performance Air Filter
FLEET FILTERS
$195.993 Layer Replacement Air Filter Wrap For High Performance Air Filter* High Quality Replacement Air Filter Wrap* For 29-071300030* 3 Layer Design* Does Not Come Pre-Oiled* Oil Is Required Before...29-071300032- SKU:
- 29-071300032
- Truck Class:
- Heavy Duty
- Make:
- Volvo
- Product Type:
- Engine Parts
$195.99Qty in Cart: 0Price:$195.99Subtotal: -
3 Layer Replacement Air Filter Wrap For 29-071300004 High Performance Air Filter
FLEET FILTERS
$195.993 Layer Replacement Air Filter Wrap For High Performance Air FilterThe replacement air filter wrap for the 29-071300004 model features a 3-layer design that services one filter. The new wraps do not...29-071300006- SKU:
- 29-071300006
- Truck Class:
- Heavy Duty
- Make:
- Kenworth
- Make:
- Peterbilt
- Product Type:
- Engine Parts
$195.99Qty in Cart: 0Price:$195.99Subtotal: -
3 Layer Replacement Air Filter Wrap For 29-071300015 High Performance Air Filter For International 9000 Series & Peterbilt 348
FLEET FILTERS
$195.993 Layer Replacement Air Filter Wrap For High Performance Air Filter* High Quality Replacement Air Filter Wrap* For 29-071300015* 3 Layer Design* Does Not Come Pre-Oiled* Oil Is Required Before...29-071300017- SKU:
- 29-071300017
- Truck Class:
- Heavy Duty
- Make:
- Peterbilt
- Product Type:
- Engine Parts
$195.99Qty in Cart: 0Price:$195.99Subtotal: -
3 Layer Replacement Air Filter Wrap For 29-071300024 High Performance Air Filter For Kenworth & Peterbilt
FLEET FILTERS
$195.993 Layer Replacement Air Filter Wrap For High Performance Air Filter* High Quality Replacement Air Filter Wrap* For 29-071300024* 3 Layer Design* Does Not Come Pre-Oiled* Oil Is Required Before...29-071300026- SKU:
- 29-071300026
- Truck Class:
- Heavy Duty
- Make:
- Kenworth
- Make:
- Peterbilt
- Product Type:
- Engine Parts
$195.99Qty in Cart: 0Price:$195.99Subtotal: -
3 Layer Replacement Air Filter Wrap For 29-071300036 High Performance Air Filter For Freightliner Cascadia 116/126
FLEET FILTERS
$195.993 Layer Replacement Air Filter Wrap For High Performance Air Filter* High Quality Replacement Air Filter Wrap* For 29-071300036* 3 Layer Design* Does Not Come Pre-Oiled* Oil Is Required Before...29-071300038- SKU:
- 29-071300038
- Truck Class:
- Heavy Duty
- Make:
- Freightliner
- Product Type:
- Engine Parts
$195.99Qty in Cart: 0Price:$195.99Subtotal: -
3 Layer Replacement Air Filter Wrap For 29-071300001 High Performance Air Filter For Freightliner, Mack & Peterbilt
FLEET FILTERS
$195.993 Layer Replacement Air Filter Wrap For High Performance Air Filter* High Quality Replacement Air Filter Wrap* For 29-071300001* 3 Layer Design* Do Not Come Pre-Oiled* Oil Is Required Before...29-071300003- SKU:
- 29-071300003
- Truck Class:
- Heavy Duty
- Make:
- Peterbilt
- Product Type:
- Engine Parts
$195.99Qty in Cart: 0Price:$195.99Subtotal: -
3 Layer Replacement Air Filter Wrap For 29-071300012 High Performance Air Filter For Ford, Freightliner & International
FLEET FILTERS
$195.993 Layer Replacement Air Filter Wrap For High Performance Air Filter* High Quality Replacement Air Filter Wrap* For 29-071300012* 3 Layer Design* Does Not Come Pre-Oiled* Oil Is Required Before...29-071300014- SKU:
- 29-071300014
- Truck Class:
- Heavy Duty
- Make:
- Freightliner
- Product Type:
- Engine Parts
$195.99Qty in Cart: 0Price:$195.99Subtotal: -
High Flow Performance Air Filter With Washable Element Media For Sterling
FLEET FILTERS
$444.99High Performance Air Filter Media Fits SterlingYou never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime, washable, high flow, air...29-071300021- SKU:
- 29-071300021
- Truck Class:
- Heavy Duty
- Make:
- Sterling
- Product Type:
- Engine Parts
$444.99Qty in Cart: 0Price:$444.99Subtotal: -
FREE SHIPPING OVER $249
CAB Fresh Chrome Exterior Cab Air Filter Assembly W/ Hardware For Peterbilt 357, 377, 378, 379 & 386
CAB FRESH FILTER CO.
$43.85Exterior Cab Air Filter AssemblyThis Chrome Exterior Cab Air Filter Assembly is ideal for keeping your truck's cab air fresh. Just place it behind the hood latch on the outside passenger side. You...01-091303- SKU:
- 01-091303
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Make:
- Peterbilt
- Product Type:
- Interior
- Position:
- Passenger Side
- Finish Options:
- Chrome-Plated
- Ready To Ship:
- Yes
$43.85Qty in Cart: 0Price:$43.85Subtotal: