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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

    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

    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

    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

    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

    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

    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. 

    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

    Semi Truck Boot Brush Guide: Does it Really Keep Your Cab Clean?(Post)

    Boot Brushes: The Key Takeaways Benefits: Keeps cab floors clean, improves footwear grip on steps and pedals, projects a professional appearance, prevents grit from grinding down interior flooring, a

    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 Mattress Sizes: Fitment Chart & Buying Guide(Post)

    Looking for the right sized semi truck mattress? Every long-haul trucker should prioritize spending a sizeable portion of their budget on a quality mattress and driver's seat. That's where you spend

    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

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  • 0.625 X .875 Inch Shoulder Bolt For Luverne And Protech Grille Guards

    0.625 X .875 Inch Shoulder Bolt For Luverne And Protech Grille Guards

    LUVERNE

    $23.92
    .625 X .875 Inch Shoulder Bolt For Luverne And Protech Grille Guards* High Quality Shoulder Bolt* Used For Grille Guards* .625 Inch X .875 Inch* Sold Individually* Warranty On Shoulder Bolts Against...
    09-0109015
    SKU:
    09-0109015
    Product Type:
    Hood Parts & Acc.
    Make:
    Universal Items
    $23.92
    Qty in Cart: 0
    Price:
    $23.92
    Subtotal:
  • FREE SHIPPING OVER $249
    3 High Power LED Compact Work Light, 3 3/8 Inch X 2 1/4 Inch

    3 High Power LED Compact Work Light, 3 3/8 Inch X 2 1/4 Inch

    UNITED PACIFIC

    $42.54
    600 Lumens Compact Round Work Light* High Quality Compact Work Light* 3 High Power LED* Round* 12-24V DC Application* 600 Lumens* Compact Design Only Measures 3-3/8 Inch X 5-3/8 Inch X 2-1/4 Inch*...
    09-16090156
    SKU:
    09-16090156
    Truck Class:
    Universal
    Lumens:
    501 to 1000 Lumens
    Shape Options:
    Round
    Make:
    Universal Items
    Material Options:
    Plastic/Poly
    Diameter Options:
    2 1/4 Inch
    Product Type:
    Lighting
    $42.54
    Qty in Cart: 0
    Price:
    $42.54
    Subtotal:
  • FREE SHIPPING OVER $249
    Full Size On / Off Momentary Rocker Switch - Standard

    Full Size On / Off Momentary Rocker Switch - Standard

    VELVAC

    $10.68
    Full Size On / Off Momentary Rocker Switch - StandardThis rocker switch with a Momentary On/Off function is a high quality aftermarket replacement. It has a snap-in design that makes installation...
    090150
    SKU:
    090150
    Truck Class:
    Universal
    Color:
    Black
    Style Options:
    Push On
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Air, Electrical, & Safety
    $10.68
    Qty in Cart: 0
    Price:
    $10.68
    Subtotal:
  • King Pin Kit Replaces 28345, ETN328345 For Eaton Suspension Systems

    King Pin Kit Replaces 28345, ETN328345 For Eaton Suspension Systems

    AFTERMARKET

    $430.99
    King Pin Kit W/ 1.873 X 9.06 Inch King Pin & Composite BushingsKeep your Eaton suspension operating efficiently with this high-quality King Pin Kit. Complete with single draw key king pins, composite...
    29-05090155
    SKU:
    29-05090155
    Diameter Options:
    2 Inch
    Product Type:
    Frame & Chassis
    Length Options:
    9 Inch
    Position:
    Kit Full
    Make:
    Universal Items
    $430.99
    Qty in Cart: 0
    Price:
    $430.99
    Subtotal:
  • King Pin Kit Replaces 328343 For Eaton Suspension Systems

    King Pin Kit Replaces 328343 For Eaton Suspension Systems

    AFTERMARKET

    $432.99
    King Pin Kit W/ 1.873 X 9.07 Inch King Pin & Bi-Metal BushingsThis high-quality Eaton King Pin Kit ensures smooth, reliable suspension performance. The kit includes single draw key king pins,...
    29-05090154
    SKU:
    29-05090154
    Product Type:
    Frame & Chassis
    Diameter Options:
    1 1/2 Inch
    Length Options:
    9 Inch
    Make:
    Universal Items
    $432.99
    Qty in Cart: 0
    Price:
    $432.99
    Subtotal:
  • King Pin Kit Replaces 2500524C91, 3093704 For Freightliner, Sterling, Bluebird Bus

    King Pin Kit Replaces 2500524C91, 3093704 For Freightliner, Sterling, Bluebird Bus

    AFTERMARKET

    $305.99
    King Pin Kit W/ 1.794 X 8.844 Inch King Pin & Bi-Metal BushingsThis high-strength King Pin Kit for Freightliner, Sterling, and Bluebird Bus delivers complete suspension support, replacing 2500524C91...
    29-05090159
    SKU:
    29-05090159
    Diameter Options:
    2 Inch
    Product Type:
    Frame & Chassis
    Position:
    Kit Full
    Length Options:
    8 3/4 Inch
    Make:
    Sterling
    Make:
    Bus
    Make:
    Freightliner
    $305.99
    Qty in Cart: 0
    Price:
    $305.99
    Subtotal:
  • 61.4 Inch Cross Tube Assembly Replaces 03357021300

    61.4 Inch Cross Tube Assembly Replaces 03357021300

    AFTERMARKET

    $736.99
    61.4 Inch Adjustable Cross Tube Assembly Replaces 03357021300* High Quality Cross Tube Assembly* Consists Of  - (1) Tie Rod End Driver Side - (1) Tie Rod End Passenger Side  - (1) Cross Tube* 61.4...
    29-05090157
    SKU:
    29-05090157
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $736.99
    Qty in Cart: 0
    Price:
    $736.99
    Subtotal:
  • 25.375 Inch Torque Rod, 1-1/4 Inch Shaft Dia.

    25.375 Inch Torque Rod, 1-1/4 Inch Shaft Dia.

    AFTERMARKET

    $220.99
    25.375 Inch Torque Rod W/ Side A And B- Straddle* High Quality Torque Rod* 25.375 Inch * 1-1/4 Inch Shaft Diameter* Side A And B- Straddle* Made In USA* Sold Individually* Warranty On Torque Rods...
    29-05090158
    SKU:
    29-05090158
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $220.99
    Qty in Cart: 0
    Price:
    $220.99
    Subtotal:
  • 56.7 Inch Cross Tube Assembly Replaces 03357021100Z

    56.7 Inch Cross Tube Assembly Replaces 03357021100Z

    AFTERMARKET

    $717.99
    56.7 Inch Adjustable Cross Tube Assembly Replaces 03357021100Z, 03357021100* High Quality Cross Tube Assembly* Consists Of  - (1) Tie Rod End Driver Side - (1) Tie Rod End Passenger Side - (1) Cross...
    29-05090156
    SKU:
    29-05090156
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $717.99
    Qty in Cart: 0
    Price:
    $717.99
    Subtotal:
  • Tie Rod End 5.625 Inch W/ 1-1/8 Inch-12 Thread- Passenger Side

    Tie Rod End 5.625 Inch W/ 1-1/8 Inch-12 Thread- Passenger Side

    AFTERMARKET

    $81.99
    5.625 Inch Length C To E Passenger Side Tie Rod End Replaces 132284For smooth steering and consistent response, this passenger side tie rod end offers a rugged design and precision fit. The 1-1/8...
    29-05090150
    SKU:
    29-05090150
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Length Options:
    5 5/8 Inch
    Position:
    Passenger Side
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $81.99
    Qty in Cart: 0
    Price:
    $81.99
    Subtotal:
  • Tie Rod End 7.25 Inch W/ 1-1/4 Inch-18 Thread Pitch - Passenger Side

    Tie Rod End 7.25 Inch W/ 1-1/4 Inch-18 Thread Pitch - Passenger Side

    AFTERMARKET

    $54.99
    7.25 inch Center to End Tie Rod End* High Quality Tie Rod End* 7.25 Inch Center To End * Thread Pitch 1-1/4 Inch-18* Height Of Taper- 2.531 Inch* Taper Minor Diameter- 1.08 Inch* Taper Major...
    29-05090151
    SKU:
    29-05090151
    Material Options:
    Steel
    Length Options:
    7 1/4 Inch
    Position:
    Passenger Side
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $54.99
    Qty in Cart: 0
    Price:
    $54.99
    Subtotal:
  • FREE SHIPPING OVER $249
    1 LED High Power 10 Watt Mini Work Light

    1 LED High Power 10 Watt Mini Work Light

    UNITED PACIFIC

    $59.99
    800 Lumens LED Mini Flood Light* High Quality Mini Work Light* 1 High Power 10-Watt LED* 800 Lumens* Flood Function With IP69K Rating* 12-36V DC* Sold Individually* Warranty On Mini Work Lights...
    09-16090157
    SKU:
    09-16090157
    Truck Class:
    Universal
    Lumens:
    501 to 1000 Lumens
    Shape Options:
    Square
    Make:
    Universal Items
    Material Options:
    Plastic/Poly
    Product Type:
    Lighting
    $59.99
    Qty in Cart: 0
    Price:
    $59.99
    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
    FleetGuard Air Filter 13.5 X 16 Inch

    FleetGuard Air Filter 13.5 X 16 Inch

    OPP - ORIGINAL PARTS PROGRAM

    $84.99
    Air Filter AF25139MFLG* High Quality Air Filter * 13.5 Inch x 16 Inch* Sold Individually* Warranty On Air Filter Against Defects In Workmanship & Material From Date Of Purchase*|** This Is An OEM...
    AF25139MFLG
    SKU:
    AF25139MFLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $84.99
    Qty in Cart: 0
    Price:
    $84.99
    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
    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:
  • 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
    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
    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
    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:
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