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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

    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

    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 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

    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

    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

    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. 

    The Best Semi Truck Half Fenders for Your Big Rig(Post)

    Upgrading and customizing your truck is part of a long-term vision. After your bumpers and hoods, add some fenders - more specifically: half fenders.  Semi truck half fenders are an exceptional way to

    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

    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

    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

    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

    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

    Semi Truck DPF Box Covers & Slipcovers: Fitment Guide(Post)

    Semi Truck DPF Box Covers: Types, Fitment & Replacement What Is a DPF Box Cover on a Semi Truck? DPF box covers are exterior panels designed to conceal or protect the aftertreatment housing. They do n

    How to Install Rear Fenders on a Peterbilt 379(Post)

    The process of installing rear fenders on a semi truck, specifically a Peterbilt 379 model, will depend on the type of fender. Whether it’s a full fender or half fender, the difference comes down to:

    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

    7 Best Exterior Chrome Upgrades for the Kenworth W900A(Post)

    Outfit your Kenworth W900A model with stunning exterior chrome accessories and stainless-steel upgrades that seamlessly tie together the entire truck’s theme. Classic big rig owners take a lot of prid

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  • FREE SHIPPING OVER $249
    Pre-Filter For Air Cleaner For Kenworth & Peterbilt

    Pre-Filter For Air Cleaner For Kenworth & Peterbilt

    CAB FRESH FILTER CO.

    $33.71
    Pre-Filter For Air Cleaner Fits Kenworth & PeterbiltWe offer aftermarket CAB Fresh pre-filters for air cleaners that fits Kenworth T680, T880, Peterbilt 567 and 579 big rigs. It features activated...
    29-0905708
    SKU:
    29-0905708
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Material Options:
    Cloth
    Make:
    Peterbilt
    Make:
    Kenworth
    Product Type:
    Exterior
    Ready To Ship:
    Yes
    $33.71
    Qty in Cart: 0
    Price:
    $33.71
    Subtotal:
  • Cab Fresh Pre-Filter For Freightliner Century, Columbia And Coronado Models

    Cab Fresh Pre-Filter For Freightliner Century, Columbia And Coronado Models

    CAB FRESH FILTER CO.

    $14.27
    Pre-Filter Mounts Under Hood on Passenger Side* High Quality Pre-Filter* Filter Mounts Under Hood On Passenger Side* Made In USA* Sold Individually* Warranty On Pre-Filters Against Defects In...
    03-09057000
    SKU:
    03-09057000
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Freightliner
    Product Type:
    Exterior
    $14.27
    Qty in Cart: 0
    Price:
    $14.27
    Subtotal:
  • FREE SHIPPING OVER $249
    13 Inch Vortox Breather Air Filter Element AF25480 For Kenworth & Peterbilt

    13 Inch Vortox Breather Air Filter Element AF25480 For Kenworth & Peterbilt

    OPP - ORIGINAL PARTS PROGRAM

    $102.99
    Air Filter Element Fits 13 Inch Vortox Air CleanersNeed a reliable air filter for your ride? Check out the 13" VORTOX BRTHR air filter element. It's built tough and designed to keep your engine...
    29-0905703
    SKU:
    29-0905703
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Make:
    Peterbilt
    Product Type:
    Exterior
    Ready To Ship:
    Yes
    $102.99
    Qty in Cart: 0
    Price:
    $102.99
    Subtotal:
  • 15 Inch Diameter Air Filter Replaces AF4197 For Late Model PACCAR With Donaldson

    15 Inch Diameter Air Filter Replaces AF4197 For Late Model PACCAR With Donaldson

    AFTERMARKET

    $153.99
    Air Filter For 15 Inch Donaldson Air Intake Cleaner* High Quality Air Filter * 15 Inch* Fits Late Model PACCAR With Donaldson Air Cleaner* Sold Individually* Warranty On Air Filter Element Against...
    29-0905709
    SKU:
    29-0905709
    Truck Class:
    Heavy Duty
    Product Type:
    Exterior
    Ready To Ship:
    Yes
    $153.99
    Qty in Cart: 0
    Price:
    $153.99
    Subtotal:
  • Air Filter For Old Style 11 Inch Donaldson Air Cleaners P181007 LAF7797 PA2312

    Air Filter For Old Style 11 Inch Donaldson Air Cleaners P181007 LAF7797 PA2312

    OPP - ORIGINAL PARTS PROGRAM

    $94.99
    10.39 Dia X 22.83 L Old Style Air Filter* High Quality Air Filter* For Old Style 11 Inch Donaldson Air Cleaners * 22.83 OAL * 10.39 Inch Diameter* Sold Individually* Warranty On Air Filters Against...
    29-0905706
    SKU:
    29-0905706
    Truck Class:
    Heavy Duty
    Length Options:
    23 Inch
    Style Options:
    Donaldson Style
    Make:
    Universal Items
    Product Type:
    Exterior
    Diameter Options:
    10 Inch
    $94.99
    Qty in Cart: 0
    Price:
    $94.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Air Cleaner Air Filter 15 x 27 Inch Replaces AF865FLG For Peterbilt & Kenworth

    Air Cleaner Air Filter 15 x 27 Inch Replaces AF865FLG For Peterbilt & Kenworth

    OPP - ORIGINAL PARTS PROGRAM

    $127.99
    15 Inch Vortox Air Cleaner Filter Replaces AF865FLGKeep your air pure and clean with the premium 15 Inch Air Filter, exclusively designed as a perfect replacement for Vortox Air Cleaners...
    29-0905700
    SKU:
    29-0905700
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Make:
    Kenworth
    Product Type:
    Exterior
    Ready To Ship:
    Yes
    $127.99
    Qty in Cart: 0
    Price:
    $127.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Air Filter Element 11.5 OD x 23.5 Inch Replaces AF25858, 5839AF25247 For Freightliner, Kenworth & Peterbilt

    Air Filter Element 11.5 OD x 23.5 Inch Replaces AF25858, 5839AF25247 For Freightliner, Kenworth & Peterbilt

    OPP - ORIGINAL PARTS PROGRAM

    $94.99
    11.5 Inch OD Air Filter ElementReplace the air filter in your 13 inch classic Donaldson Air Cleaner with this quality filter element. Enjoy superior airflow, longer service intervals, and easy...
    29-0905701
    SKU:
    29-0905701
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Make:
    Freightliner
    Make:
    Kenworth
    Product Type:
    Exterior
    Style Options:
    Donaldson Style
    Height Options:
    23 Inch
    Ready To Ship:
    Yes
    $94.99
    Qty in Cart: 0
    Price:
    $94.99
    Subtotal:
  • 17 Inch Stainless Steel Filter Light Bar W/ 20 Round 3/4 Inch Light Holes

    17 Inch Stainless Steel Filter Light Bar W/ 20 Round 3/4 Inch Light Holes

    ARANDA TRUCK ACCESSORIES

    $238.99
    17 Inch Filter Light Bar W/ 20 Round Light HolesUpgrade your lighting setup with the 17 Inch Stainless Steel Filter Light Bar, designed to deliver both style and heavy-duty performance. Its universal...
    29-0905712
    SKU:
    29-0905712
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Product Type:
    Exterior
    Height Options:
    17 Inch
    Light Options:
    Without Lights
    Size Options:
    18 Gauge
    Make:
    Universal Items
    $238.99
    Qty in Cart: 0
    Price:
    $238.99
    Subtotal:
  • National Admiral Air High Back Passenger Seat W/ Swivel, Bellows, Heat, Wide Back - Lonestar Black & Light Tan 2 Tone Leather

    National Admiral Air High Back Passenger Seat W/ Swivel, Bellows, Heat, Wide Back - Lonestar Black & Light Tan 2 Tone Leather

    NATIONAL SEATING

    $1,277.99
    2 Tone Leather Admiral Air Seat Lonestar Black & Light Tan* High Quality Seat* Lonestar Black And Light Tan 2 Tone* Leather* Without Armrests* Passenger Side Swivel* Standard Features Included On...
    40079057
    SKU:
    40079057
    Color:
    Black
    Truck Class:
    Heavy Duty
    Style Options:
    High Back
    Material Options:
    Leather
    Make:
    Universal Items
    Type Options:
    Standard Base
    Product Type:
    Seats
    $1,277.99
    Qty in Cart: 0
    Price:
    $1,277.99
    Subtotal:
  • Load-Share Front Axle Air Ride Kit Without Air Springs

    Load-Share Front Axle Air Ride Kit Without Air Springs

    LOAD-SHARE SUSPENSIONS

    $850.99
    Front Axle Air Ride Kit Without Air Springs* High Quality Air Ride Kit* Without Air Springs * Fits Various Models* Note-Some Models Need Shock Mount Kit* Sold Individually* Warranty On Air Ride Kits...
    29-0905710
    SKU:
    29-0905710
    Truck Class:
    Heavy Duty
    Position:
    Front
    Material Options:
    Rubber
    Product Type:
    Frame & Chassis
    $850.99
    Qty in Cart: 0
    Price:
    $850.99
    Subtotal:
  • National Admiral High Back Driver Air Seat W/ Swivel, Bellows, Heat, Wide Back - Lonestar Black & Light Tan 2 Tone Leather

    National Admiral High Back Driver Air Seat W/ Swivel, Bellows, Heat, Wide Back - Lonestar Black & Light Tan 2 Tone Leather

    NATIONAL SEATING

    $1,277.99
    2 Tone Leather Admiral Air Seat Lonestar Black & Light Tan* High Quality Seat* Lonestar Black And Light Tan 2 Tone* Leather* Without Armrests* Driver Side Swivel* Standard Features Included On This...
    40049057
    SKU:
    40049057
    Truck Class:
    Heavy Duty
    Color:
    Black
    Style Options:
    High Back
    Material Options:
    Leather
    Make:
    Universal Items
    Type Options:
    Standard Base
    Product Type:
    Seats
    $1,277.99
    Qty in Cart: 0
    Price:
    $1,277.99
    Subtotal:
  • Intake Pre-Filter For LAF3551 Air Filter

    Intake Pre-Filter For LAF3551 Air Filter

    FREEDOM AIR FILTERS

    $76.99
    Intake Pre-Filter For P153551 Air Filter* High Quality Polyester Mesh Pre-Filter* This Is A Pre-Filter Wrap That Covers The Air Filter Element. Air Filter Element Not Included. Sold Separately.* Fits...
    09-0723000
    SKU:
    09-0723000
    Truck Class:
    Heavy Duty
    Make:
    Freightliner
    Make:
    Western Star
    Make:
    Kenworth
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    $76.99
    Qty in Cart: 0
    Price:
    $76.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Interior Fresh Air Filter For Peterbilt

    Interior Fresh Air Filter For Peterbilt

    CAB FRESH FILTER CO.

    $22.07
    Peterbilt Interior Fresh Air Filter AssemblyKeep the inside of your cab fresh with this aftermarket interior filter from CAB Fresh. This filter features internal antimicrobials that stops mold...
    01-1503026
    SKU:
    01-1503026
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Material Options:
    Cloth
    Make:
    Peterbilt
    Product Type:
    Interior
    Ready To Ship:
    Yes
    $22.07
    Qty in Cart: 0
    Price:
    $22.07
    Subtotal:
  • FREE SHIPPING OVER $249
    Interior Fresh Air Filter Assembly For Peterbilt

    Interior Fresh Air Filter Assembly For Peterbilt

    CAB FRESH FILTER CO.

    $46.91
    Peterbilt Fresh Air Filter AssemblyFind aftermarket interior filters with assembly from CAB Fresh at 4 State Trucks. This filter features internal antimicrobials that stops mold growth, reduces odor...
    01-1503025
    SKU:
    01-1503025
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Material Options:
    Cloth
    Make:
    Peterbilt
    Product Type:
    Interior
    Ready To Ship:
    Yes
    $46.91
    Qty in Cart: 0
    Price:
    $46.91
    Subtotal:
  • FREE SHIPPING OVER $249
    Air Filter Assembly For HVAC For Peterbilt & Kenworth

    Air Filter Assembly For HVAC For Peterbilt & Kenworth

    CAB FRESH FILTER CO.

    $38.75
    Air Filter Assembly Fits Peterbilt & KenworthAt 4 State Trucks we offer aftermarket CAB Fresh air filter assemblies for Peterbilt 567 and 579 models, and Kenworth T680 and T880 models. The air filter...
    29-1503002
    SKU:
    29-1503002
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Material Options:
    Cloth
    Make:
    Peterbilt
    Make:
    Kenworth
    Product Type:
    Interior
    Ready To Ship:
    Yes
    $38.75
    Qty in Cart: 0
    Price:
    $38.75
    Subtotal:
  • FREE SHIPPING OVER $249
    Cab Fresh Filter Only For Freightliner Cascadia, Century, Columbia & Coronado

    Cab Fresh Filter Only For Freightliner Cascadia, Century, Columbia & Coronado

    CAB FRESH FILTER CO.

    $17.91
    Cab 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
    $17.91
    Qty in Cart: 0
    Price:
    $17.91
    Subtotal:
  • FREE SHIPPING OVER $249
    Interior Cab Fresh Air Filter Replacement For Peterbilt 377, 378, 379 & 385

    Interior Cab Fresh Air Filter Replacement For Peterbilt 377, 378, 379 & 385

    CAB FRESH FILTER CO.

    $43.85
    Peterbilt Interior Cab Fresh Air FilterThis air filter fits under the dashboard on the passenger side. Simply slide the filter into the existing track next to the passenger door. It replaces the...
    01-1503017
    SKU:
    01-1503017
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Material Options:
    Cloth
    Make:
    Peterbilt
    Product Type:
    Interior
    Ready To Ship:
    Yes
    $43.85
    Qty in Cart: 0
    Price:
    $43.85
    Subtotal:
  • FREE SHIPPING OVER $249
    Air Filter Assembly For HVAC No Housing For Peterbilt & Kenworth

    Air Filter Assembly For HVAC No Housing For Peterbilt & Kenworth

    CAB FRESH FILTER CO.

    $14.27
    Air Filter Assembly Fits Peterbilt & KenworthWe offer aftermarket CAB Fresh air filter assemblies for Peterbilt 567 and 579 models, and Kenworth T680 and T880 models. The air filter is only for HVAC...
    29-1503003
    SKU:
    29-1503003
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Material Options:
    Cloth
    Make:
    Kenworth
    Make:
    Peterbilt
    Product Type:
    Interior
    Ready To Ship:
    Yes
    $14.27
    Qty in Cart: 0
    Price:
    $14.27
    Subtotal:
  • FREE SHIPPING OVER $249
    Black Plastic Cab Fresh Filter For Freightliner Cascadia, Century, Columbia & Coronado

    Black Plastic Cab Fresh Filter For Freightliner Cascadia, Century, Columbia & Coronado

    CAB FRESH FILTER CO.

    $51.99
    Cab 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
    $51.99
    Qty in Cart: 0
    Price:
    $51.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Cab Fresh Replacement HVAC Pre-Filter For Peterbilt & Kenworth

    Cab Fresh Replacement HVAC Pre-Filter For Peterbilt & Kenworth

    CAB FRESH FILTER CO.

    $14.27
    Air 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
    $14.27
    Qty in Cart: 0
    Price:
    $14.27
    Subtotal:
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