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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

    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

    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

    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

    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

    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 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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    BESTfit 5 Inch Aluminized Multi-Bend Turbo Pipe Replaces 04-17094-020 For Freightliner FLD

    BESTfit 5 Inch Aluminized Multi-Bend Turbo Pipe Replaces 04-17094-020 For Freightliner FLD

    BESTFIT TRUCK PARTS

    $205.99
    BESTfit Multi-Bend 5 Inch Aluminized Turbo Pipe Without Pyrometer Fitting Fits Freightliner FLD* High Quality Turbo Exhaust Pipe* (2) 90 Degree Bends* Without Pyrometer Fitting* Made of Aluminized...
    03-08140200
    SKU:
    03-08140200
    Diameter Options:
    5 Inch
    Truck Class:
    Heavy Duty
    Style Options:
    Flanged
    Material Options:
    Aluminized Steel
    Make:
    Freightliner
    Product Type:
    Exhaust
    $205.99
    Qty in Cart: 0
    Price:
    $205.99
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  • 3 Layer Replacement Air Filter Wrap For 29-071300018 High Performance Air Filter

    3 Layer Replacement Air Filter Wrap For 29-071300018 High Performance Air Filter

    FLEET FILTERS

    $195.99
    3 Layer Replacement Air Filter Wrap For High Performance Air Filter* High Quality Replacement Air Filter Wrap* For 29-071300018* 3 Layer Design* Does Not Come Pre-Oiled* Oil Is Required Before...
    29-071300020
    SKU:
    29-071300020
    Truck Class:
    Heavy Duty
    Make:
    Volvo
    Product Type:
    Engine Parts
    $195.99
    Qty in Cart: 0
    Price:
    $195.99
    Subtotal:
  • On Sale
    Limited Quantity Available
    High Flow Performance Air Filter With Washable Element Media For Peterbilt - Pair

    High Flow Performance Air Filter With Washable Element Media For Peterbilt - Pair

    FLEET FILTERS

    Now: $325.13
    Was: $839.99
    High Performance Air Filter Media Fits Peterbilt - PairYou never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime, washable, high flow,...
    29-090500020
    SKU:
    29-090500020
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Exterior
    Now: $325.13
    Was: $839.99
    Qty in Cart: 0
    Price:
    Now: $325.13
    Was: $839.99
    Subtotal:
  • Steel 36 Gallon Bulkhead Hydraulic Reservoir W/ 10 Micron Filter - Powder Coated Black

    Steel 36 Gallon Bulkhead Hydraulic Reservoir W/ 10 Micron Filter - Powder Coated Black

    BUYERS PRODUCTS

    $1,825.99
    36 Gallon Hydraulic Reservoir With 10 Micron FilterThis durable 36-gallon Bulkhead Hydraulic Reservoir is built from 12-gauge steel with a rust-resistant black powder-coated finish. It features a...
    09-02500020
    SKU:
    09-02500020
    Color:
    Black
    Truck Class:
    Universal
    Height Options:
    26 Inch
    Width Options:
    42 Inch
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Cargo Control
    Length Options:
    8 1/2 Inch
    Capacity:
    36 Gallons
    Finish Options:
    Black Powder Coat
    Type Options:
    Side Mount
    Size Options:
    12 Gauge
    $1,825.99
    Qty in Cart: 0
    Price:
    $1,825.99
    Subtotal:
  • Stainless Steel Diesel Particulate Filter Replaces 23537225, A6804908692 For Detroit Diesel S60 Engine

    Stainless Steel Diesel Particulate Filter Replaces 23537225, A6804908692 For Detroit Diesel S60 Engine

    GLOBAL EMISSIONS

    $2,619.99
    Stainless Steel Diesel Particulate Filter Fits Detroit Diesel S60 Engine* High Quality Diesel Particulate Filter* Made Of Stainless Steel * OEM Quality Clamps And Gaskets Included* Sold Individually...
    29-080600020
    SKU:
    29-080600020
    Truck Class:
    Heavy Duty
    Style Options:
    Detroit
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Exhaust
    $2,619.99
    Qty in Cart: 0
    Price:
    $2,619.99
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  • Surface Mount Amber Strobe Light W/ 36 Flashing Patterns

    Surface Mount Amber Strobe Light W/ 36 Flashing Patterns

    TRUX ACCESSORIES

    $67.99
    Amber Strobe Light W/ 36 Flashing PatternsThis class one directional amber strobe light features 36 selectable flash patterns with the ability to recall the last pattern. It has a synchronization and...
    09-160900204
    SKU:
    09-160900204
    Color:
    Amber
    Truck Class:
    Universal
    Make:
    Universal Items
    Material Options:
    Plastic/Poly
    Product Type:
    Lighting
    $67.99
    Qty in Cart: 0
    Price:
    $67.99
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  • Slim Surface Mount Amber Strobe Light W/ 36 Flashing Patterns

    Slim Surface Mount Amber Strobe Light W/ 36 Flashing Patterns

    TRUX ACCESSORIES

    $67.99
    Amber Strobe Light W/ 36 Flashing PatternsLooking for a strobe light with a slim design? This class one directional amber slim strobe light features 36 selectable flash patterns with the ability to...
    09-160900203
    SKU:
    09-160900203
    Color:
    Amber
    Truck Class:
    Universal
    Make:
    Universal Items
    Shape Options:
    Oval
    Material Options:
    Plastic/Poly
    Product Type:
    Lighting
    $67.99
    Qty in Cart: 0
    Price:
    $67.99
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  • VC Stainless Steel A/C Cover W/ Filter Door For Peterbilt 330, 357, 378, 375, 377 & 379

    VC Stainless Steel A/C Cover W/ Filter Door For Peterbilt 330, 357, 378, 375, 377 & 379

    VALLEY CHROME PLATING

    $168.99
    Stainless Steel A/C Cover W/ Filter Door By Valley Chrome Fits Peterbilt 330, 357, 378, 375, 377 & 379Restore your truck's appearance and protect vital A/C components with the VC Stainless Steel A/C...
    01-15020002
    SKU:
    01-15020002
    Material Options:
    Stainless Steel
    Product Type:
    Interior
    Location:
    Made In USA
    Make:
    Peterbilt
    $168.99
    Qty in Cart: 0
    Price:
    $168.99
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    Oil Filter Wrench For 3-1/2 Inch To 3-7/8 Inch Oil Filters

    Oil Filter Wrench For 3-1/2 Inch To 3-7/8 Inch Oil Filters

    AFTERMARKET

    $12.47
    Oil Filter WrenchEasily remove 3-1/2 inch to 3-7/8 inch spin on type of oil filters with this wrench. It is sold individually.* High Quality Wrench * For Oil Filter* 3-1/2 Inch to 3-7/8 Inch (89mm to...
    09-21000204
    SKU:
    09-21000204
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Tools
    $12.47
    Qty in Cart: 0
    Price:
    $12.47
    Subtotal:
  • Filter Door Panel Cover For Peterbilt 375, 377, 378 & 379

    Filter Door Panel Cover For Peterbilt 375, 377, 378 & 379

    GRAND GENERAL

    $13.33
    Peterbilt Filter Door Panel CoverEnhance the interior detail of your Peterbilt 375, 377, 378, or 379 with this high-quality filter door panel cover designed for Peterbilt 370 Series 1995 & later...
    01-15020306
    SKU:
    01-15020306
    Material Options:
    Stainless Steel
    Product Type:
    Interior
    Height Options:
    4 1/2 Inch
    Width Options:
    6 Inch
    Make:
    Peterbilt
    $13.33
    Qty in Cart: 0
    Price:
    $13.33
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  • Stainless Steel DPF Cover For International LT 2018-Current

    Stainless Steel DPF Cover For International LT 2018-Current

    ROADWORKS

    $478.99
    International LT Diesel Particulate Filter Cover By RoadWorks* High Quality DPF Cover* Made Of 430 Grade Stainless Steel * Cover Only* Does Not Include Step Or Brackets* Sold Individually* Warranty...
    07-050200002
    SKU:
    07-050200002
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    International
    Product Type:
    Fuel Tanks
    $478.99
    Qty in Cart: 0
    Price:
    $478.99
    Subtotal:
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    Aluminum HEXTHREAD ® Filter Cartridge Assembly Compatible With XTRACTOR ® XTR-8856 And XTRACTOR ® XTR-8058 For Trailer Axles

    Aluminum HEXTHREAD ® Filter Cartridge Assembly Compatible With XTRACTOR ® XTR-8856 And XTRACTOR ® XTR-8058 For Trailer Axles

    THE HUB CORPORATION

    $45.99
    HEXTHREAD Filter Cartridge For Trailer Axle ApplicationsThe HEXTHREAD Filter Cartridge is a high-quality replacement filtration component designed for trailer axle hub caps using the XTRACTOR...
    19-20200031
    SKU:
    19-20200031
    Product Type:
    Trailer
    Material Options:
    Aluminum
    Make:
    Trailer
    Ready To Ship:
    Yes
    $45.99
    Qty in Cart: 0
    Price:
    $45.99
    Subtotal:
  • Smooth Aluminum Underbody Tool Box W/ Dual Barn Doors- 72 X 36 X 36 Inch

    Smooth Aluminum Underbody Tool Box W/ Dual Barn Doors- 72 X 36 X 36 Inch

    ICONIC

    $2,014.99
    72 X 36 X 36 Inch Smooth Aluminum Underbody Tool Box W/ Dual Barn DoorsTake your truck organization to the next level with this oversized 72-inch underbody tool box crafted from smooth marine-grade...
    09-020100850
    SKU:
    09-020100850
    Finish Options:
    Smooth
    Height Options:
    36 Inch
    Product Type:
    Toolboxes
    Width Options:
    36 Inch
    Length Options:
    72 Inch
    Material Options:
    Aluminum
    Make:
    Universal Items
    $2,014.99
    Qty in Cart: 0
    Price:
    $2,014.99
    Subtotal:
  • Bright Diamond Plate Aluminum Single Door Dog Box W/ Open Rungs- 36 X 36 Inch

    Bright Diamond Plate Aluminum Single Door Dog Box W/ Open Rungs- 36 X 36 Inch

    AFTERMARKET

    $1,010.99
    36 X 36 Inch Bright Diamond Plate Aluminum Single Door Dog Box W/ Open RungsKeep your dogs comfortable and secure with the Bright Diamond Plate Aluminum Single Door Dog Box featuring open rungs for...
    09-020100181
    SKU:
    09-020100181
    Truck Class:
    Universal
    Length Options:
    63 Inch
    Material Options:
    Aluminum
    Make:
    Universal Items
    Finish Options:
    Diamond Plate
    Product Type:
    Toolboxes
    $1,010.99
    Qty in Cart: 0
    Price:
    $1,010.99
    Subtotal:
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    BESTfit Coolant Flex Hose Heavy Duty Silicone 2.5 ID X 36 Inch

    BESTfit Coolant Flex Hose Heavy Duty Silicone 2.5 ID X 36 Inch

    BESTFIT TRUCK PARTS

    $452.99
    BESTfit 2.50 ID X 36 Inch Heavy Duty Silicone Coolant Flex Hose* High Quality Silicone Coolant Hose* 2.50 Inch Inside Diameter - 64MM* 2.92 Inch Outside Diameter - 74MM* 36 Inches Length* 6 Inch Bend...
    09-0702045
    SKU:
    09-0702045
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $452.99
    Qty in Cart: 0
    Price:
    $452.99
    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:
  • 2 Leaf Parabolic Steer Spring 4 Inch Wide Replaces 1664618C91 & EE16002002 For International

    2 Leaf Parabolic Steer Spring 4 Inch Wide Replaces 1664618C91 & EE16002002 For International

    AFTERMARKET

    $543.99
    2 Leaf Spring For Steer Fits International 2500, 2600, 8100, 8200, 8300, 9100, 9200, 9400, 9900Provide your International truck with enhanced handling and ride quality using this high-performance 2...
    07-0591020
    SKU:
    07-0591020
    Length Options:
    29 Inch
    Truck Class:
    Heavy Duty
    Width Options:
    4 Inch
    Make:
    International
    Product Type:
    Frame & Chassis
    $543.99
    Qty in Cart: 0
    Price:
    $543.99
    Subtotal:
  • Minimizer 36 Inch White Chest Tool Box

    Minimizer 36 Inch White Chest Tool Box

    MINIMIZER

    $485.99
    Medium Weather Resistant Chest Tool BoxNeed a reliable place to store your tools? The Minimizer 36 Inch White Chest Tool Box has you covered. It's sturdy, weatherproof, and fits perfectly in your...
    09-02010023
    SKU:
    09-02010023
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    $485.99
    Qty in Cart: 0
    Price:
    $485.99
    Subtotal:
  • Minimizer 36 Inch Red Chest Tool Box

    Minimizer 36 Inch Red Chest Tool Box

    MINIMIZER

    $485.99
    Medium Weather Resistant Chest Tool BoxLooking for a tough toolbox for your truck? Check out the Minimizer 36 Inch Red Chest Tool Box. It's made from rugged poly material, so no worries about rust or...
    09-02010022
    SKU:
    09-02010022
    Material Options:
    Plastic/Poly
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    $485.99
    Qty in Cart: 0
    Price:
    $485.99
    Subtotal:
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