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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
    22 LED 6 Inch Oval Abyss Light Stop, Turn, Tail Light - Red Led/Clear Lens

    22 LED 6 Inch Oval Abyss Light Stop, Turn, Tail Light - Red Led/Clear Lens

    UNITED PACIFIC

    $16.15
    Red LED 6 Inch Oval Abyss Light Stop, Turn, Tail Light* High Quality Abyss Light* Polycarbonate Lens* 6 Inch * Mounting Hardware Not Included* Stop/Turn/ Tail Function* Red LED/Clear Lens* Sonically...
    09-16090341
    SKU:
    09-16090341
    Color:
    Red
    Truck Class:
    Universal
    Material Options:
    Plastic/Poly
    Shape Options:
    Oval
    Make:
    Universal Items
    Product Type:
    Lighting
    $16.15
    Qty in Cart: 0
    Price:
    $16.15
    Subtotal:
  • FREE SHIPPING
    42 Inch Standard Double Row LED Light Bar W/ 80 Diodes

    42 Inch Standard Double Row LED Light Bar W/ 80 Diodes

    TRUX ACCESSORIES

    $279.99
    Double Row 42 Inch Combination Spot & Flood LED Light Bar* High Quality Light Bar* Made Of Polycarbonate* 42 Inch* 80 Diodes* 10-30 Operating Volts* 9600 Effective Lumens* 24000 Raw Lumens* Wire...
    09-16090343
    SKU:
    09-16090343
    Truck Class:
    Universal
    Make:
    Universal Items
    Material Options:
    Plastic/Poly
    Length Options:
    42 Inch
    Product Type:
    Lighting
    $279.99
    Qty in Cart: 0
    Price:
    $279.99
    Subtotal:
  • FREE SHIPPING OVER $249
    4 Inch Clear Red Stop, Turn & Tail RND Flange Mount LED Light W/ 19 Diodes

    4 Inch Clear Red Stop, Turn & Tail RND Flange Mount LED Light W/ 19 Diodes

    TRUX ACCESSORIES

    $50.99
    4 Inch Round Chrome LED Stop / Turn / Tail Light W/ 19 Diodes* High Quality Stop/ Turn/ Tail Light* Made Of Polycarbonate* Dimensions - 4 Inch Diameter - 5.25 Inch Length  - 5.25 Inch Width - 1.75...
    09-16090348
    SKU:
    09-16090348
    Truck Class:
    Universal
    Make:
    Universal Items
    Diameter Options:
    4 Inch
    Shape Options:
    Round
    Color:
    Red
    Material Options:
    Plastic/Poly
    Product Type:
    Lighting
    Ready To Ship:
    Yes
    $50.99
    Qty in Cart: 0
    Price:
    $50.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Red/White Dual Function 4.3 Inch Round LED Stop, Turn, Tail & Back Up Light W/ Clear Lens

    Red/White Dual Function 4.3 Inch Round LED Stop, Turn, Tail & Back Up Light W/ Clear Lens

    TRUX ACCESSORIES

    $59.99
    Red/White Dual Function 4 Inch Round LED Light W/ 3 Prong Plug & Lock ConnectorGive your truck a versatile rear lighting upgrade with the4.3-Inch Round Red/White Dual Function LED Stop, Turn, Tail &...
    09-16090345
    SKU:
    09-16090345
    Diameter Options:
    4 Inch
    Material Options:
    Plastic/Poly
    Style Options:
    Dual Revolution
    Shape Options:
    Round
    Truck Class:
    Universal
    Product Type:
    Lighting
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $59.99
    Qty in Cart: 0
    Price:
    $59.99
    Subtotal:
  • FREE SHIPPING OVER $249
    4 Inch 19 Diode Double Fury Dual Color Round Combination Tail Light - Amber to Red LED / Clear Lens

    4 Inch 19 Diode Double Fury Dual Color Round Combination Tail Light - Amber to Red LED / Clear Lens

    UNITED PACIFIC

    $24.15
    Red To Amber 19 LED Round Stop Turn & Tail Light* High Quality Stop/Turn/Tail Light* Made Of Polycarbonate* With Warning Light* 19 Diode * 4 Inch Round* Red And Amber LED/Clear Lens* Injection Molded...
    09-16090340
    SKU:
    09-16090340
    Diameter Options:
    4 Inch
    Truck Class:
    Universal
    Color:
    Amber/Red
    Shape Options:
    Round
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Lighting
    $24.15
    Qty in Cart: 0
    Price:
    $24.15
    Subtotal:
  • 22 LED 6 Inch Oval Abyss Light Stop, Turn, Tail Light - Red Led/Red Lens

    22 LED 6 Inch Oval Abyss Light Stop, Turn, Tail Light - Red Led/Red Lens

    UNITED PACIFIC

    $16.15
    Red LED 6 Inch Oval Abyss Light Stop, Turn, Tail Light* High Quality Abyss Light* Polycarbonate Lens* 6 Inch* Mounting Hardware Not Included* Stop/Turn/ Tail Function* Red LED/Red Lens* Sonically...
    09-16090342
    SKU:
    09-16090342
    Color:
    Red
    Truck Class:
    Universal
    Diameter Options:
    6 Inch
    Shape Options:
    Oval
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Lighting
    $16.15
    Qty in Cart: 0
    Price:
    $16.15
    Subtotal:
  • 20 Inch Chrome Wrap Around Bumper, 10 Gauge W/ Pintail Hitch Holes For Peterbilt 357, 378 SBA

    20 Inch Chrome Wrap Around Bumper, 10 Gauge W/ Pintail Hitch Holes For Peterbilt 357, 378 SBA

    VALLEY CHROME PLATING

    $1,641.99
    Valley Chrome Wrap Around Bumper W/ Pintail Hitch Holes Fits Peterbilt 357 & 378 SBAIf you're in the market for a new or replacement bumper, look no further than this 10-gauge (1/8 inch thick)...
    HOD009034
    SKU:
    HOD009034
    Light Options:
    Without Lights
    Make:
    Peterbilt
    Truck Class:
    Heavy Duty
    Height Options:
    20 Inch
    Style Options:
    Set Back Axle
    Finish Options:
    Chrome-Plated
    Material Options:
    Steel
    Size Options:
    10 Gauge
    Type Options:
    Standard Mount
    Product Type:
    Bumpers
    $1,641.99
    Qty in Cart: 0
    Price:
    $1,641.99
    Subtotal:
  • BESTfit Pressure Sensor Replaces 3626432C1, DPFE23, P232244 For International

    BESTfit Pressure Sensor Replaces 3626432C1, DPFE23, P232244 For International

    BESTFIT TRUCK PARTS

    $214.99
    Pressure Sensor By BESTfit Fits InternationalKeep your International system operating with confidence using the BESTfit Pressure Sensor. This high-quality sensor monitors pressure levels to ensure...
    07-0809034
    SKU:
    07-0809034
    Product Type:
    Engine Parts
    Make:
    International
    $214.99
    Qty in Cart: 0
    Price:
    $214.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Red/White Dual Function 4 Inch Round LED Stop, Turn, Tail & Back Up Light W/ Clear Lens

    Red/White Dual Function 4 Inch Round LED Stop, Turn, Tail & Back Up Light W/ Clear Lens

    TRUX ACCESSORIES

    $59.99
    Red/White Dual Function 4 Inch Round LED Light W/ 3 Prong Plug & Super Seal AdapterGive your truck a bright and versatile rear lighting upgrade with the4-Inch Round Red/White Dual Function LED Stop,...
    09-16090344
    SKU:
    09-16090344
    Product Type:
    Lighting
    Diameter Options:
    4 Inch
    Material Options:
    Plastic/Poly
    Truck Class:
    Universal
    Style Options:
    Dual Revolution
    Shape Options:
    Round
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $59.99
    Qty in Cart: 0
    Price:
    $59.99
    Subtotal:
  • FREE SHIPPING OVER $249
    4 Inch Round 8 LED Amber Marker Light

    4 Inch Round 8 LED Amber Marker Light

    TRUX ACCESSORIES

    $18.10
    4 Inch Economy Amber Stop, Turn & Tail Light* High Quality Stop/ Turn/ Tail Light* Made Of Polycarbonate* Dimensions - 4 Inch Length/Width   - 1.12 Inch Height* 8 Diodes* Dot Compliant* Amber Lens*...
    09-16090347
    SKU:
    09-16090347
    Truck Class:
    Universal
    Make:
    Universal Items
    Diameter Options:
    4 Inch
    Shape Options:
    Round
    Color:
    Amber
    Material Options:
    Plastic/Poly
    Product Type:
    Lighting
    Ready To Ship:
    Yes
    $18.10
    Qty in Cart: 0
    Price:
    $18.10
    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:
  • CSM Aluminum Cab, Cowl, Sleeper Panel Kits W/ Filler Plates 5 Inch For Peterbilt 379

    CSM Aluminum Cab, Cowl, Sleeper Panel Kits W/ Filler Plates 5 Inch For Peterbilt 379

    CHROME SHOP MAFIA

    $702.99 - $825.99
    Choose Option(s) to see description.Fitment* Fits Peterbilt 379 1987 thru 2006CSM Aluminum Cab, Cowl, 36 Inch Standard Sleeper Blank Panels 5 Inch For Peterbilt 379 W/ Aftermarket ExhaustBlank...
    PPR_299034
    SKU:
    PPR_299034
    Product Type:
    Exterior
    Truck Class:
    Heavy Duty
    Light Options:
    Without Lights
    Material Options:
    Aluminum
    Make:
    Peterbilt
    Position:
    Kit Full
    Location:
    Made In USA
    Height Options:
    5 Inch
    Ready To Ship:
    Yes
    $702.99 - $825.99
    Qty in Cart: 0
    Price:
    $702.99 - $825.99
    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
    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
    $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:
  • 1-Piece Stainless Steel Diesel Particulate Filter Replaces A6804910894 For Detroit DD13, DD15 Engines

    1-Piece Stainless Steel Diesel Particulate Filter Replaces A6804910894 For Detroit DD13, DD15 Engines

    GLOBAL EMISSIONS

    $1,266.99
    1-Piece Stainless Steel Diesel Particulate Filter Fits Detroit DD13 & DD15 Engines* High Quality Diesel Particulate Filter* Made Of Stainless Steel * Exclusive 1-Piece Canister Design For Durability*...
    29-080600042
    SKU:
    29-080600042
    Truck Class:
    Heavy Duty
    Style Options:
    Detroit
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Exhaust
    $1,266.99
    Qty in Cart: 0
    Price:
    $1,266.99
    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:
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