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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

    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

    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

    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

    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. 

    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

    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

    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

    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:

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  • 3 Layer Replacement Air Filter Wrap For 29-071300036 High Performance Air Filter For Freightliner Cascadia 116/126

    3 Layer Replacement Air Filter Wrap For 29-071300036 High Performance Air Filter For Freightliner Cascadia 116/126

    FLEET FILTERS

    $195.99
    3 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
    $195.99
    Qty in Cart: 0
    Price:
    $195.99
    Subtotal:
  • Stainless Steel Diesel Particulate Filter Replaces 291-8515, 309-6991, 294-8692 For Caterpillar C7/C9 Engines

    Stainless Steel Diesel Particulate Filter Replaces 291-8515, 309-6991, 294-8692 For Caterpillar C7/C9 Engines

    GLOBAL EMISSIONS

    $2,940.99
    Stainless Steel Diesel Particulate Filter Fits Caterpillar C7 & C9 Engines* High Quality Diesel Particulate Filter* Made Of Stainless Steel * OEM Quality Clamps And Gaskets Included* Sold...
    29-080600038
    SKU:
    29-080600038
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Exhaust
    $2,940.99
    Qty in Cart: 0
    Price:
    $2,940.99
    Subtotal:
  • 11 Inch Rectangular Multi-Mount Amber 24 Diode LED Mini Light Bar

    11 Inch Rectangular Multi-Mount Amber 24 Diode LED Mini Light Bar

    BUYERS PRODUCTS

    $108.99
    Rectangular Amber LED Amber Lens Mini Light Bar* High Quality Mini Light Bar* Light Color Amber* Plastic Housing* Lens Made Of Polycarbonate* Dimension  - 11 Inch Width  - 2.160 Inch Height  - 11...
    09-160900038
    SKU:
    09-160900038
    Color:
    Amber
    Truck Class:
    Universal
    Material Options:
    Plastic/Poly
    Shape Options:
    Rectangular
    Make:
    Universal Items
    Length Options:
    11 Inch
    Product Type:
    Lighting
    $108.99
    Qty in Cart: 0
    Price:
    $108.99
    Subtotal:
  • Merritt Aluminum Cab Rack W/ 2 Enclosures 80 X 68 X 11 Inch

    Merritt Aluminum Cab Rack W/ 2 Enclosures 80 X 68 X 11 Inch

    MERRITT

    $4,593.99
    Aluminum Cab Rack W/ Jail Bar WindowKeep your cab protected and your gear organized with the Merritt 68 x 80 Inch Aluminum Cab Rack. Equipped with two enclosures with chain racks and a 27" x 23" jail...
    320381M0115
    SKU:
    320381M0115
    Height Options:
    68 Inch
    Width Options:
    80 Inch
    Material Options:
    Aluminum
    Product Type:
    Cargo Control
    Location:
    Made In USA
    Make:
    Universal Items
    Length Options:
    11 Inch
    $4,593.99
    Qty in Cart: 0
    Price:
    $4,593.99
    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:
  • Turnpike Truck Trim 11 Inch Stainless Steel 2 Piece Drop Visor For Peterbilt

    Turnpike Truck Trim 11 Inch Stainless Steel 2 Piece Drop Visor For Peterbilt

    TURNPIKE TRUCK TRIM

    $377.99
    11 Inch Stainless Steel 2 Piece Drop Visor By Turnpike Truck Trim Fits PeterbiltEnhance the front-end appearance of your Peterbilt flat top with the Turnpike Truck Trim 11 Inch Stainless Steel Drop...
    01-09003038
    SKU:
    01-09003038
    Height Options:
    11 Inch
    Make:
    Peterbilt
    Light Options:
    Without Lights
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Type Options:
    Standard Mount
    Product Type:
    Exterior
    Cab Style:
    Flat Windshield
    Style Options:
    Drop
    Ready To Ship:
    Yes
    $377.99
    Qty in Cart: 0
    Price:
    $377.99
    Subtotal:
  • 3 Inch Stainless Steel Cab Panels W/ 11 Total Amber/Clear Smoked LEDs For Peterbilt 389 131 BBC

    3 Inch Stainless Steel Cab Panels W/ 11 Total Amber/Clear Smoked LEDs For Peterbilt 389 131 BBC

    PHOENIX DESIGN

    $374.99
    3 Inch Stainless Steel Cab Panels W/ 11 Total Amber/Clear Smoked LEDsWhen durability meets design, you get these 3 Inch Stainless Steel Cab Panels with 11 total amber/clear smoked LEDs, built for the...
    01-091200387
    SKU:
    01-091200387
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Light Options:
    With Lights
    Material Options:
    Stainless Steel
    Make:
    Peterbilt
    Finish Options:
    Paintable
    Length Options:
    47 Inch
    Product Type:
    Exterior
    $374.99
    Qty in Cart: 0
    Price:
    $374.99
    Subtotal:
  • 12 X 11 Inch Black Powder-Coated Vertical Mount Traffic Cone Holders - Holds 10 - 28 Inch Cones

    12 X 11 Inch Black Powder-Coated Vertical Mount Traffic Cone Holders - Holds 10 - 28 Inch Cones

    BUYERS PRODUCTS

    $36.68
    Black Powder-Coated Carbon Steel Vertical Mount Traffic Cone Holder* High Quality Traffic Cone Holder* Color Powder Coat Black* Allows Easy Stacking* Dimensions   - 11 Inch Width  - 12 Inch Height  -...
    09-02060038
    SKU:
    09-02060038
    Truck Class:
    Universal
    Width Options:
    11 Inch
    Diameter Options:
    11 Inch
    Height Options:
    12 Inch
    Make:
    Universal Items
    Material Options:
    Steel
    Color:
    Black
    Product Type:
    Cargo Control
    $36.68
    Qty in Cart: 0
    Price:
    $36.68
    Subtotal:
  • BESTfit Chrome 18 Inch Texas Bumper, 10 Gauge W/ Boxed Ends & Tow Holes For Kenworth W990

    BESTfit Chrome 18 Inch Texas Bumper, 10 Gauge W/ Boxed Ends & Tow Holes For Kenworth W990

    BESTFIT TRUCK PARTS

    $749.99
    BESTfit Kenworth 10 Gauge-Chrome Plated Steel 18 Inch Boxed End Texas Bumper W/ Mounting & Tow Holes* High Quality Bumper* Made Of 10 Gauge Chrome Plated Steel* 18 Inches Height * Standard Mount...
    02-010018038K
    SKU:
    02-010018038K
    Height Options:
    18 Inch
    Truck Class:
    Heavy Duty
    Style Options:
    Texas Boxed End
    Material Options:
    Steel
    Make:
    Kenworth
    Finish Options:
    Chrome-Plated
    Product Type:
    Bumpers
    Type Options:
    Standard Mount
    Size Options:
    10 Gauge
    Ready To Ship:
    Yes
    $749.99
    Qty in Cart: 0
    Price:
    $749.99
    Subtotal:
  • EPDM Molded Refrigerant NO8 Air Suction Hose 1 ID X 11 3/16 Inch Replaces 01-32303-000 For Freightliner

    EPDM Molded Refrigerant NO8 Air Suction Hose 1 ID X 11 3/16 Inch Replaces 01-32303-000 For Freightliner

    AUTOMANN USA

    $14.01
    Freightliner 11 3/16 Inch Air Suction HoseThe EPDM Molded Refrigerant NO8 Air Suction Hose delivers superior durability and performance for Freightliner trucks. Crafted from premium EPDM material and...
    03-07020038
    SKU:
    03-07020038
    Material Options:
    Rubber
    Diameter Options:
    1 Inch
    Truck Class:
    Heavy Duty
    Make:
    Freightliner
    Product Type:
    Engine Parts
    $14.01
    Qty in Cart: 0
    Price:
    $14.01
    Subtotal:
  • FREE SHIPPING OVER $249
    4 Inch Stainless Steel Low Profile Bezel - Flange Mount

    4 Inch Stainless Steel Low Profile Bezel - Flange Mount

    GRAND GENERAL

    $20.52
    SS Bezel W/ Flange Mount For 4 Inch Round Low Profile LED Lights* High Quality Bezel* Made Of Stainless Steel* Fits Syder, Mega 10 Lights (Lights Not Included)* Low Profile* Anti Theft Design Using 3...
    09-1610038
    SKU:
    09-1610038
    Truck Class:
    Universal
    Shape Options:
    Round
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Diameter Options:
    4 Inch
    Product Type:
    Lighting
    Ready To Ship:
    Yes
    $20.52
    Qty in Cart: 0
    Price:
    $20.52
    Subtotal:
  • Merritt Dyna-Light Aluminum Cab Rack 68 X 80 Inch W/ 2 Side Enclosures & Locking Doors 18 X 9 Inch

    Merritt Dyna-Light Aluminum Cab Rack 68 X 80 Inch W/ 2 Side Enclosures & Locking Doors 18 X 9 Inch

    MERRITT

    $4,692.99
    Diamond Plate Aluminum Cab Rack W/ Radius Corners & HangersReinforce your truck with the Merritt Dyna-Light 2 Door Cab Rack 68 x 80 Inch, a high-strength aluminum rack with diamond plate construction...
    320381M0098
    SKU:
    320381M0098
    Material Options:
    Aluminum
    Truck Class:
    Heavy Duty
    Finish Options:
    Diamond Plate
    Make:
    Universal Items
    Product Type:
    Cargo Control
    $4,692.99
    Qty in Cart: 0
    Price:
    $4,692.99
    Subtotal:
  • Merritt Dyna-Light Aluminum Cab Rack 68 X 80 Inch W/ 9 Inch Side Enclosures

    Merritt Dyna-Light Aluminum Cab Rack 68 X 80 Inch W/ 9 Inch Side Enclosures

    MERRITT

    $4,107.99
    Aluminum Cab Rack W/ 2 Side Enclosures 9 Inch & Radius Corners* High Quality Cab Rack* Made Of Aluminum * Dimensions:  - 68 Inch Height   - 80 Inch Length* 2- 9 Inch Side Enclosures* Merritt...
    320381
    SKU:
    320381
    Truck Class:
    Heavy Duty
    Product Type:
    Cargo Control
    Material Options:
    Aluminum
    Make:
    Universal Items
    $4,107.99
    Qty in Cart: 0
    Price:
    $4,107.99
    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:
  • On Sale
    Limited Quantity Available
    FREE SHIPPING OVER $249
    Chrome LED Light Bar Bezel

    Chrome LED Light Bar Bezel

    UNITED PACIFIC

    Now: $4.86
    Was: $18.79
    Chrome Single Light Bar BezelDress up an 11 diode single light bar with this shiny bezel by United Pacific. It is made of chrome plated plastic and simply snaps over your light. The bezel is sold...
    09-1605038
    SKU:
    09-1605038
    Truck Class:
    Universal
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Product Type:
    Lighting
    Ready To Ship:
    Yes
    Now: $4.86
    Was: $18.79
    Qty in Cart: 0
    Price:
    Now: $4.86
    Was: $18.79
    Subtotal:
  • AirDog Champ High Pressure Fuel Air Separator For Detroit Diesel DD15 Engines

    AirDog Champ High Pressure Fuel Air Separator For Detroit Diesel DD15 Engines

    AIRDOG HD

    $468.99
    High Pressure Fuel Air Separator Fits Detroit Diesel DD15 EnginesOptimize fuel flow on your Detroit Diesel DD15 engine with the AirDog Champ High Pressure Fuel Air Separator. The Champ Series kit...
    29-070300038
    SKU:
    29-070300038
    Product Type:
    Engine Parts
    $468.99
    Qty in Cart: 0
    Price:
    $468.99
    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
    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:
  • Power Steering Pump Fits Cummins C, ISC & ISL Engines For Kenworth & Peterbilt

    Power Steering Pump Fits Cummins C, ISC & ISL Engines For Kenworth & Peterbilt

    AFTERMARKET

    $449.99
    PS Type Power Steering Pump Replaces K188252. K188-252. 21370253. 02-137025-3. 1002392. 10-02392. PS362815R102Maintain optimal steering performance with this high-quality TRW-PS Type Power Steering...
    29-07120038
    SKU:
    29-07120038
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Material Options:
    Aluminum
    Make:
    Peterbilt
    Make:
    Kenworth
    $449.99
    Qty in Cart: 0
    Price:
    $449.99
    Subtotal:
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