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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. 

    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

    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

    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

    T880 Visor Ultimate Buyer's Guide(Post)

    There are countless Kenworth T880 visor options to choose from depending on the theme and style you’re going for. Here's a quick buyer's guide for Kenworth T880 aftermarket visors. Before you buy, con

    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

    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 Choose the Right W990 Drop Visor(Post)

    The best Kenworth W990 drop visor depends on your design preference, mounting configuration, and windshield type or cab style (curved or flat). Buying a Custom W990 Truck Visor Online?  If you're brow

    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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    BESTfit 4 Inch OD / OD Multi-Bend Exhaust Elbow Below Muffler Replaces OE 4ME-4925 For Mack RD/R 1990 - 2000,

    BESTfit 4 Inch OD / OD Multi-Bend Exhaust Elbow Below Muffler Replaces OE 4ME-4925 For Mack RD/R 1990 - 2000,

    BESTFIT TRUCK PARTS

    $258.99
    BESTfit Multi-Bend Plain Elbow BOM 4 Inch Fits Mack R/RD* High Quality Exhaust Pipe* 3 Bend* Made Of Aluminized Steel* 4 Inch OD/OD* Sold Individually* Warranty On Exhaust Pipe Against Defects In...
    11-08149250
    SKU:
    11-08149250
    Truck Class:
    Heavy Duty
    Diameter Options:
    4 Inch
    Style Options:
    Elbow Multi-Bend
    Material Options:
    Steel
    Make:
    Mack
    Product Type:
    Exhaust
    $258.99
    Qty in Cart: 0
    Price:
    $258.99
    Subtotal:
  • 3 Inch Stainless Steel Cab Panels W/ 8 P1 Amber/Amber LEDs For Peterbilt 386 W/ Cab-Mount Exhaust

    3 Inch Stainless Steel Cab Panels W/ 8 P1 Amber/Amber LEDs For Peterbilt 386 W/ Cab-Mount Exhaust

    PHOENIX DESIGN

    $273.99
    3 Inch Stainless Steel Cab Panels W/ 8 P1 Amber LED Amber Lens Lights Fits Peterbilt 386 W/ Cab-Mount Exhaust* High Quality Cab Panels* Made Of 304 Stainless Steel* 4 P1 Lights Per Side* Amber...
    01-091200925
    SKU:
    01-091200925
    Light Options:
    With Lights
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Make:
    Peterbilt
    Finish Options:
    Polished
    Length Options:
    40 Inch
    Product Type:
    Exterior
    $273.99
    Qty in Cart: 0
    Price:
    $273.99
    Subtotal:
  • Steering Wheel 18 Inch Rose Gold 4 Spoke W/ Horn Button & Wood Grain Bezel

    Steering Wheel 18 Inch Rose Gold 4 Spoke W/ Horn Button & Wood Grain Bezel

    UNITED PACIFIC

    $192.99
    18 Inch Rose Gold Steering Wheel 4 Spoke W/ Horn Button & Wood Grain Bezel* High Quality Steering Wheel* Includes:  - 18 Inch Wood Grain Rim With Finger Grips On Back Edge  - (4) Rose Gold Spokes  -...
    09-1500925
    SKU:
    09-1500925
    Product Type:
    Interior
    Diameter Options:
    18 Inch
    Shape Options:
    Round
    Material Options:
    Wood
    Make:
    Universal Items
    $192.99
    Qty in Cart: 0
    Price:
    $192.99
    Subtotal:
  • Bostrom Gray Mordura Cloth High Back Seat W/ Hi- Pro, Dual Armrests & Standard Air

    Bostrom Gray Mordura Cloth High Back Seat W/ Hi- Pro, Dual Armrests & Standard Air

    BOSTROM TRUCK SEATS

    $917.99
    Gray Mordura Cloth High Back Seat W/ Hi- Pro, Dual Armrests & Standard Air By BostromEnhance driver comfort and support with the Bostrom Gray Mordura Cloth High Back Seat with Hi-Pro, engineered for...
    2339252552
    SKU:
    2339252552
    Material Options:
    Cloth
    Style Options:
    High Back
    Product Type:
    Seats
    Color:
    Gray
    Make:
    Universal Items
    $917.99
    Qty in Cart: 0
    Price:
    $917.99
    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:
  • Bostrom 915 Talladega Standard Base High Back Seat W/ Dual Arm Rest - Tan Vinyl

    Bostrom 915 Talladega Standard Base High Back Seat W/ Dual Arm Rest - Tan Vinyl

    BOSTROM TRUCK SEATS

    $1,236.99
    T915 High Back Truck Seat in Tan Vinyl with Dual ArmsYou can drive for miles comfortably with the T Series, known for its durability. The Flex Support Cushion System minimizes cushion compression,...
    2339254549
    SKU:
    2339254549
    Material Options:
    Vinyl
    Truck Class:
    Heavy Duty
    Product Type:
    Seats
    Make:
    Universal Items
    $1,236.99
    Qty in Cart: 0
    Price:
    $1,236.99
    Subtotal:
  • Roadworks 3 X 6 Inch SS Feet Pair Sign

    Roadworks 3 X 6 Inch SS Feet Pair Sign

    ROADWORKS

    $65,536.00
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    PPR_299253
    SKU:
    PPR_299253
    Product Type:
    Cargo Control
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    $65,536.00
    Qty in Cart: 0
    Price:
    $65,536.00
    Subtotal:
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    GBATS 2025 Hat

    GBATS 2025 Hat

    CHROME SHOP MAFIA

    $10.99
    Guilty By Association Truck Show 2025 HatShow your pride and support for the trucking community with the GBATS 2025 Hat from Guilty By Association Truck Show. This high-quality hat features the...
    CSMH092525
    SKU:
    CSMH092525
    Product Type:
    Apparel
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $10.99
    Qty in Cart: 0
    Price:
    $10.99
    Subtotal:
  • Bostrom T-915 High Back Air Suspension Truck Seat, Manual Lumbar, Dual Armrests - Gray Vinyl

    Bostrom T-915 High Back Air Suspension Truck Seat, Manual Lumbar, Dual Armrests - Gray Vinyl

    BOSTROM TRUCK SEATS

    $1,060.99
    Gray Vinyl T-915 High Back Air Suspension Truck Seat* High Quality Seat* Made Of Vinyl* Gray* Hi-Back* Air Lumbar* Sold Individually* Warranty On Seats Against Defects In Workmanship & Material From...
    2339252546
    SKU:
    2339252546
    Truck Class:
    Heavy Duty
    Color:
    Gray
    Style Options:
    High Back
    Material Options:
    Vinyl
    Make:
    Universal Items
    Type Options:
    Standard Base
    Product Type:
    Seats
    $1,060.99
    Qty in Cart: 0
    Price:
    $1,060.99
    Subtotal:
  • TPHD 90 Degree Brass Airline Fitting 5/32 x 1/8 Inch

    TPHD 90 Degree Brass Airline Fitting 5/32 x 1/8 Inch

    TPHD

    $8.64
    90 Degree 5/32 x 1/8 Inch Brass Fitting* High Quality Air Line Fitting* Brass* 5/32 Inch x 1/8 Inch* 90 Degree* Sold Individually* Warranty On Air Line Fitting Against Defects In Workmanship &...
    SF69252
    SKU:
    SF69252
    Truck Class:
    Heavy Duty
    Material Options:
    Brass
    Make:
    Universal Items
    Product Type:
    Air, Electrical, & Safety
    Ready To Ship:
    Yes
    $8.64
    Qty in Cart: 0
    Price:
    $8.64
    Subtotal:
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    U Bolt Kit 8 X 4 Inch For Peterbilt 378, 379

    U Bolt Kit 8 X 4 Inch For Peterbilt 378, 379

    LOAD-SHARE SUSPENSIONS

    $67.99
    U Bolt KitThis U-bolt kit fits 378 & 379 Peterbilt steer axles and more! Each kit includes a pair of 7.5" long x 4" wide U-bolts with 3/4" diameter square bolts, plus nuts and washers for easy setup...
    29-050925
    SKU:
    29-050925
    Length Options:
    8 Inch
    Truck Class:
    Heavy Duty
    Height Options:
    4 Inch
    Make:
    Peterbilt
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $67.99
    Qty in Cart: 0
    Price:
    $67.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Cab Fresh HVAC Pre-Filter W/ Black Housing For Peterbilt & Kenworth

    Cab Fresh HVAC Pre-Filter W/ Black Housing For Peterbilt & Kenworth

    CAB FRESH FILTER CO.

    $50.99
    Air 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
    $50.99
    Qty in Cart: 0
    Price:
    $50.99
    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:
  • 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
    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:
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