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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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  • FREE SHIPPING OVER $249
    Filter Fuel Water Separator Replaces Donaldson P557004 For MX Paccar Engines

    Filter Fuel Water Separator Replaces Donaldson P557004 For MX Paccar Engines

    OPP - ORIGINAL PARTS PROGRAM

    $64.99
    Donaldson Fuel Filter and Water Separator CartridgeThe Fuel Filter and Water Separator removes contaminants and water from the fuel system.* High Quality Fuel Water Separator Filter* P557004...
    DNP557004
    SKU:
    DNP557004
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $64.99
    Qty in Cart: 0
    Price:
    $64.99
    Subtotal:
  • Bulldog HD Rear Shock Absorber Replaces 14QK-413M4, 25624341, 57241-004 For Mack CH

    Bulldog HD Rear Shock Absorber Replaces 14QK-413M4, 25624341, 57241-004 For Mack CH

    BULLDOG HD SHOCKS

    $49.40
    Heavy Duty Shock Absorber Fits Mack CH 1989-2004Bulldog HD shocks are fleet tested and approved. This is a premium rear replacement shock reengineered to be better than the factory part that came...
    11-050000004
    SKU:
    11-050000004
    Truck Class:
    Heavy Duty
    Length Options:
    23 Inch
    Make:
    Mack
    Product Type:
    Frame & Chassis
    $49.40
    Qty in Cart: 0
    Price:
    $49.40
    Subtotal:
  • 3 Layer Replacement Air Filter Wrap For 29-071300044 High Performance Air Filter

    3 Layer Replacement Air Filter Wrap For 29-071300044 High Performance Air Filter

    FLEET FILTERS

    $112.99
    3 Layer Replacement Air Filter Wrap For High Performance Air Filter* High Quality Replacement Air Filter Wrap* For 29-071300044* 3 Layer Design* Does Not Come Pre-Oiled* Oil Is Required Before...
    29-071300045
    SKU:
    29-071300045
    Truck Class:
    Heavy Duty
    Make:
    Freightliner
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $112.99
    Qty in Cart: 0
    Price:
    $112.99
    Subtotal:
  • 3 Layer Replacement Air Filter Wrap For 29-071300042 High Performance Air Filter

    3 Layer Replacement Air Filter Wrap For 29-071300042 High Performance Air Filter

    FLEET FILTERS

    $112.99
    3 Layer Replacement Air Filter Wrap For High Performance Air Filter* High Quality Replacement Air Filter Wrap* For 29-071300042* 3 Layer Design* Does Not Come Pre-Oiled* Oil Is Required Before...
    29-071300043
    SKU:
    29-071300043
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    $112.99
    Qty in Cart: 0
    Price:
    $112.99
    Subtotal:
  • Stainless Steel Diesel Particulate Filter Replaces 5010832R91 For International W/ MaxxForce Engine

    Stainless Steel Diesel Particulate Filter Replaces 5010832R91 For International W/ MaxxForce Engine

    GLOBAL EMISSIONS

    $2,004.99
    Stainless Steel Diesel Particulate Filter Fits International W/ MaxxForce Engine - Replaces 5010832R91* High Quality Diesel Particulate Filter* Made Of Stainless Steel * OEM Quality Clamps And...
    07-080600004
    SKU:
    07-080600004
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    International
    Product Type:
    Exhaust
    $2,004.99
    Qty in Cart: 0
    Price:
    $2,004.99
    Subtotal:
  • 1-Piece Stainless Steel Diesel Particulate Filter Replaces A6804910494 For Detroit DD13, DD15 Engines

    1-Piece Stainless Steel Diesel Particulate Filter Replaces A6804910494 For Detroit DD13, DD15 Engines

    GLOBAL EMISSIONS

    $1,360.99
    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*...
    29-080600043
    SKU:
    29-080600043
    Truck Class:
    Heavy Duty
    Style Options:
    Detroit
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Exhaust
    $1,360.99
    Qty in Cart: 0
    Price:
    $1,360.99
    Subtotal:
  • RigMaster Diesel Glow Plug For Kohler Engine

    RigMaster Diesel Glow Plug For Kohler Engine

    RIGMASTER

    $60.99
    Kohler Diesel Glow Plug - K-004* High Quality Glow Plug* Sold Individually* Warranty On Glow Plugs Against Defects In Workmanship & Material From Date Of Purchase*** High Quality Aftermarket...
    K004
    SKU:
    K004
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $60.99
    Qty in Cart: 0
    Price:
    $60.99
    Subtotal:
  • Stainless Steel Diesel Particulate Filter Replaces 261-2318, 220-6054, 264-1556 For Caterpillar C9 Engine

    Stainless Steel Diesel Particulate Filter Replaces 261-2318, 220-6054, 264-1556 For Caterpillar C9 Engine

    GLOBAL EMISSIONS

    $2,589.99
    Stainless Steel Diesel Particulate Filter Fits Caterpillar C9 Engine* High Quality Diesel Particulate Filter* Made Of Stainless Steel * OEM Quality Clamps And Gaskets Included* Sold Individually *...
    29-080600040
    SKU:
    29-080600040
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Exhaust
    $2,589.99
    Qty in Cart: 0
    Price:
    $2,589.99
    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:
  • Front of Rear Spring Leaf Hanger Driver Side- Replaces 1611639004 For Freightliner Airliner

    Front of Rear Spring Leaf Hanger Driver Side- Replaces 1611639004 For Freightliner Airliner

    AFTERMARKET

    $154.99
    Rear Hanger Replaces 1611639004Support your Freightliner Airliner's suspension with this Front of Rear Spring Leaf Hanger, Driver Side, engineered for durability and precision. Replacing OEM...
    03-05100048
    SKU:
    03-05100048
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Freightliner
    Product Type:
    Frame & Chassis
    $154.99
    Qty in Cart: 0
    Price:
    $154.99
    Subtotal:
  • HVAC Intake Pre-Filter For Volvo VNL Gen II 2004-2018

    HVAC Intake Pre-Filter For Volvo VNL Gen II 2004-2018

    FREEDOM AIR FILTERS

    $36.85
    HVAC Intake Pre-Filter Fits Volvo VNL Gen II 2004-2018* High Quality Intake Pre-Filter* Proprietary Polyester Mesh* Passenger Side* Enhance The Efficiency Of Any Performance Or Exposed Air Filter*...
    13-150300004
    SKU:
    13-150300004
    Position:
    Passenger Side
    Color:
    Black
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Make:
    Volvo
    Product Type:
    Interior
    $36.85
    Qty in Cart: 0
    Price:
    $36.85
    Subtotal:
  • 3 Layer Replacement Air Filter Wrap For 29-071300039 High Performance Air Filter

    3 Layer Replacement Air Filter Wrap For 29-071300039 High Performance Air Filter

    FLEET FILTERS

    $112.99
    3 Layer Replacement Air Filter Wrap For High Performance Air Filter* High Quality Replacement Air Filter Wrap* For 29-071300039* 3 Layer Design* Does Not Come Pre-Oiled* Oil Is Required Before...
    29-071300040
    SKU:
    29-071300040
    Truck Class:
    Heavy Duty
    Make:
    Freightliner
    Product Type:
    Engine Parts
    $112.99
    Qty in Cart: 0
    Price:
    $112.99
    Subtotal:
  • 3 Layer Replacement Air Filter Wrap For 29-090500002 High Performance Air Filter

    3 Layer Replacement Air Filter Wrap For 29-090500002 High Performance Air Filter

    FLEET FILTERS

    $383.99
    3 Layer Replacement Air Filter Wrap For High Performance Air Filter* High Quality Replacement Air Filter Wrap* For 29-090500002* 3 Layer Design* Does Not Come Pre-Oiled* Oil Is Required Before...
    29-090500004
    SKU:
    29-090500004
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Make:
    Peterbilt
    Product Type:
    Exterior
    $383.99
    Qty in Cart: 0
    Price:
    $383.99
    Subtotal:
  • 1-Piece Stainless Steel Diesel Particulate Filter Replaces 5273093NX For Cummins ISM Engine

    1-Piece Stainless Steel Diesel Particulate Filter Replaces 5273093NX For Cummins ISM Engine

    GLOBAL EMISSIONS

    $2,070.99
    1-Piece Stainless Steel Diesel Particulate Filter Fits Cummins ISM Engine* High Quality Diesel Particulate Filter* Made Of Stainless Steel * Exclusive 1-Piece Canister Design For Durability* OEM...
    29-080600047
    SKU:
    29-080600047
    Truck Class:
    Heavy Duty
    Style Options:
    Cummins
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Exhaust
    $2,070.99
    Qty in Cart: 0
    Price:
    $2,070.99
    Subtotal:
  • 1-Piece Stainless Steel Diesel Particulate Filter Replaces 5295606NX, 5579357 For Cummins ISC Engine

    1-Piece Stainless Steel Diesel Particulate Filter Replaces 5295606NX, 5579357 For Cummins ISC Engine

    GLOBAL EMISSIONS

    $2,020.99
    1-Piece Stainless Steel Diesel Particulate Filter Fits Cummins ISC Engine* High Quality Diesel Particulate Filter* Made Of Stainless Steel * Exclusive 1-Piece Canister Design For Durability* OEM...
    29-080600049
    SKU:
    29-080600049
    Truck Class:
    Heavy Duty
    Style Options:
    Cummins
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Exhaust
    $2,020.99
    Qty in Cart: 0
    Price:
    $2,020.99
    Subtotal:
  • High Flow Performance Air Filter With Washable Element Media For Freightliner, Western Star

    High Flow Performance Air Filter With Washable Element Media For Freightliner, Western Star

    FLEET FILTERS

    $585.99
    High Performance Air Filter Media Fits Freightliner, Western StarYou never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime, washable,...
    29-071300044
    SKU:
    29-071300044
    Truck Class:
    Heavy Duty
    Make:
    Freightliner
    Product Type:
    Engine Parts
    $585.99
    Qty in Cart: 0
    Price:
    $585.99
    Subtotal:
  • 1-Piece Stainless Steel Diesel Particulate Filter Replaces 5295603NX, 5579367 For Cummins ISB Engine

    1-Piece Stainless Steel Diesel Particulate Filter Replaces 5295603NX, 5579367 For Cummins ISB Engine

    GLOBAL EMISSIONS

    $1,476.99
    1-Piece Stainless Steel Diesel Particulate Filter Fits Cummins ISB Engine* High Quality Diesel Particulate Filter* Made Of Stainless Steel * Exclusive 1-Piece Canister Design For Durability* OEM...
    29-080600048
    SKU:
    29-080600048
    Truck Class:
    Heavy Duty
    Style Options:
    Cummins
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Exhaust
    $1,476.99
    Qty in Cart: 0
    Price:
    $1,476.99
    Subtotal:
  • Stainless Steel Diesel Particulate Filter Replaces 2871462NX, 5579366 For Cummins, PACCAR ISB, PX6 Engines

    Stainless Steel Diesel Particulate Filter Replaces 2871462NX, 5579366 For Cummins, PACCAR ISB, PX6 Engines

    GLOBAL EMISSIONS

    $1,509.99
    Stainless Steel Diesel Particulate Filter Fits Cummins/PACCAR ISB & PX6 Engines* High Quality Diesel Particulate Filter* Made Of Stainless Steel * OEM Quality Clamps And Gaskets Included* Sold...
    29-080600046
    SKU:
    29-080600046
    Truck Class:
    Heavy Duty
    Style Options:
    Cummins
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Exhaust
    $1,509.99
    Qty in Cart: 0
    Price:
    $1,509.99
    Subtotal:
  • 1-Piece Stainless Steel Diesel Particulate Filter Replaces 5295604, 5283283 For Cummins ISX Engine

    1-Piece Stainless Steel Diesel Particulate Filter Replaces 5295604, 5283283 For Cummins ISX Engine

    GLOBAL EMISSIONS

    $2,120.99
    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...
    29-080600044
    SKU:
    29-080600044
    Truck Class:
    Heavy Duty
    Style Options:
    Cummins
    Material Options:
    Stainless Steel
    Product Type:
    Exhaust
    Make:
    Universal Items
    $2,120.99
    Qty in Cart: 0
    Price:
    $2,120.99
    Subtotal:
  • 1-Piece Stainless Steel Diesel Particulate Filter Replaces 2871461NX, 3618711, Q629355 For Cummins ISB Engine

    1-Piece Stainless Steel Diesel Particulate Filter Replaces 2871461NX, 3618711, Q629355 For Cummins ISB Engine

    GLOBAL EMISSIONS

    $1,641.99
    1-Piece Stainless Steel Diesel Particulate Filter Fits Cummins ISB Engine* High Quality Diesel Particulate Filter* Made Of Stainless Steel * Exclusive 1-Piece Canister Design For Durability* OEM...
    29-080600045
    SKU:
    29-080600045
    Truck Class:
    Heavy Duty
    Style Options:
    Cummins
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Exhaust
    $1,641.99
    Qty in Cart: 0
    Price:
    $1,641.99
    Subtotal:
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