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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

    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

    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

    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

    Blatant Signs Your Turbocharger is Failing (And When to Replace it) (Post)

    If your semi truck turbocharger is failing, you'll encounter a few common signs. In this post, we'll cover what those are, and similar symptoms that aren't actually the turbo, but a related part.  Sig

    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

    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 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

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    16-14 AWG Blue Crimp Seal Heat Shrink Male Bullet For .157 Dia. - 10 PCS

    16-14 AWG Blue Crimp Seal Heat Shrink Male Bullet For .157 Dia. - 10 PCS

    AFTERMARKET

    $8.90
    16-14 AWG Heat Shrink Male Bullet For .157 Dia. - 10 PCS* High Quality Heat Shrink Male Bullet* Blue* 10 Pieces* 16-14 AWG .157 Dia.* Adhesive-Lined To Seal The Connection* The Translucent Tubing...
    09-16030157
    SKU:
    09-16030157
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Air, Electrical, & Safety
    Ready To Ship:
    Yes
    $8.90
    Qty in Cart: 0
    Price:
    $8.90
    Subtotal:
  • FREE SHIPPING OVER $249
    6 Diode Red LED 157 Hardhat Marker Light

    6 Diode Red LED 157 Hardhat Marker Light

    PETERSON MFG

    $19.66
    Hardhat Clearance & Marker Light* High Quality Light * LED 157* LED 6 Diodes* Red Light* Sold Individually* Made in the USA* Warranty on lights against defects in workmanship & material from date of...
    09-160106071
    SKU:
    09-160106071
    Truck Class:
    Universal
    Make:
    Universal Items
    Color:
    Red
    Location:
    Made In USA
    Shape Options:
    Rectangular
    Material Options:
    Plastic/Poly
    Product Type:
    Lighting
    $19.66
    Qty in Cart: 0
    Price:
    $19.66
    Subtotal:
  • FREE SHIPPING OVER $249
    6 Diode Amber LED 157 Hardhat Marker Light

    6 Diode Amber LED 157 Hardhat Marker Light

    PETERSON MFG

    $18.93
    Hardhat Clearance & Marker Light* High Quality Light* LED 157* LED 6 Diodes* Amber Light* Sold Individually* Made in the USA* Warranty on light against defects in workmanship & material from date of...
    09-160101070
    SKU:
    09-160101070
    Location:
    Made In USA
    Truck Class:
    Universal
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Color:
    Amber
    Shape Options:
    Rectangular
    Product Type:
    Lighting
    $18.93
    Qty in Cart: 0
    Price:
    $18.93
    Subtotal:
  • 3 Inch Poly Torque Rod Bushing, Hutch Type Replaces E-934 For Watson & Chalin, TL, STL Series

    3 Inch Poly Torque Rod Bushing, Hutch Type Replaces E-934 For Watson & Chalin, TL, STL Series

    AUTOMANN USA

    $4.53
    Hutch Torque Rod Bushing Replaces D94, E7453, E-7453, R307453Keep your suspension components aligned and protected with this Hutch Type 3-Inch Poly Torque Rod Bushing for Watson & Chalin TL and STL...
    19-05180157
    SKU:
    19-05180157
    Truck Class:
    Heavy Duty
    Diameter Options:
    1 Inch
    Material Options:
    Plastic/Poly
    Make:
    Trailer
    Product Type:
    Trailer
    $4.53
    Qty in Cart: 0
    Price:
    $4.53
    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:
  • Air Spring Cabin 7064, 1S5-157, 67768, 11020074 For International, Kenworth

    Air Spring Cabin 7064, 1S5-157, 67768, 11020074 For International, Kenworth

    AFTERMARKET

    $48.65
    Heavy-Duty Air Spring for Superior Cabin SuspensionRide in comfort with new cabin air springs, designed to meet OEM specifications. Built with compressed air technology, these components absorb road...
    13-09500002
    SKU:
    13-09500002
    Product Type:
    Exterior
    Make:
    International
    Make:
    Kenworth
    Style Options:
    Sleeve
    $48.65
    Qty in Cart: 0
    Price:
    $48.65
    Subtotal:
  • 1-Piece Stainless Steel Diesel Particulate Filter Replaces 2871578 For Cummins ISX Engine

    1-Piece Stainless Steel Diesel Particulate Filter Replaces 2871578 For Cummins ISX Engine

    GLOBAL EMISSIONS

    $2,110.99
    1-Piece Stainless Steel Diesel Particulate Filter Fits Cummins ISX Engine* High Quality Diesel Particulate Filter* Made Of Stainless Steel * Exclusive 1-Piece Canister Design For Durability* OEM...
    29-080600025
    SKU:
    29-080600025
    Truck Class:
    Heavy Duty
    Style Options:
    Cummins
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Exhaust
    $2,110.99
    Qty in Cart: 0
    Price:
    $2,110.99
    Subtotal:
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    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:
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    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:
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    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:
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    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
    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
    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
    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
    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:
  • Stainless Steel Cab Panels W/ 10 - 2 Inch Light Holes For Kenworth T800, W900

    Stainless Steel Cab Panels W/ 10 - 2 Inch Light Holes For Kenworth T800, W900

    PHOENIX DESIGN

    $181.99
    Cab Panels W/ 10 - 2 Inch Light Holes Fits Kenworth T800 & W900* High Quality Cab Panel* Made Of 304 Stainless Steel* 5 - 3/4 Inch Round Light Holes Per Side* Lights Not Included* 8 Inch Spacing *...
    02-091200157
    SKU:
    02-091200157
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Make:
    Kenworth
    Finish Options:
    Paintable
    Length Options:
    40 Inch
    Light Options:
    Without Lights
    Product Type:
    Exterior
    $181.99
    Qty in Cart: 0
    Price:
    $181.99
    Subtotal:
  • Stainless Steel Blank Sleeper Panels W/ Fuel Door Access For Kenworth T800 W/ 86 Inch Sleeper

    Stainless Steel Blank Sleeper Panels W/ Fuel Door Access For Kenworth T800 W/ 86 Inch Sleeper

    PHOENIX DESIGN

    $464.99
    Blank Sleeper Panels W/ Fuel Door Access Fit Kenworth T800 W/ 86 Inch Sleeper* High Quality Sleeper Panel * Made Of 304 Stainless Steel * Blank* With Fuel Door * For Trucks With 86 Inch Sleepers*...
    02-10123157
    SKU:
    02-10123157
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Kenworth
    Finish Options:
    Paintable
    Length Options:
    86 Inch
    Light Options:
    Without Lights
    Product Type:
    Exterior
    $464.99
    Qty in Cart: 0
    Price:
    $464.99
    Subtotal:
  • Bright Diamond Plate Aluminum Low Profile Crossover Tool Box W/ Rail- 69 Inch For Pickup Trucks

    Bright Diamond Plate Aluminum Low Profile Crossover Tool Box W/ Rail- 69 Inch For Pickup Trucks

    AFTERMARKET

    $715.99
    69 Inch Bright Diamond Plate Aluminum Low Profile Crossover Tool Box W/ Rail Fits Pickup TrucksDesigned for hardworking pickup owners, the Bright Aluminum 69-Inch Low Profile Tool Box with Rail...
    09-020100157
    SKU:
    09-020100157
    Length Options:
    69 Inch
    Truck Class:
    Universal
    Height Options:
    14 Inch
    Width Options:
    20 Inch
    Material Options:
    Aluminum
    Make:
    Universal Items
    Finish Options:
    Diamond Plate
    Product Type:
    Toolboxes
    $715.99
    Qty in Cart: 0
    Price:
    $715.99
    Subtotal:
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    Limited Quantity Available
    9005 To H4 Headlight Adapter 9005 Low Beam

    9005 To H4 Headlight Adapter 9005 Low Beam

    UNITED PACIFIC

    Now: $3.43
    Was: $6.24
    High Beam Wire Harness* High Quality Wire Harness* Replacement Adapter For Projection Headlights With 9005 Bulbs* Sold Individually* Warranty On Wire Harnesses Against Defects In Workmanship &...
    09-1606157
    SKU:
    09-1606157
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Lighting
    Ready To Ship:
    Yes
    Now: $3.43
    Was: $6.24
    Qty in Cart: 0
    Price:
    Now: $3.43
    Was: $6.24
    Subtotal:
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