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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

    5 Unique Lug Nut Cover Styles to Give Your Truck a More Polished Look(Post)

    Semi truck lug nut covers aren’t just useful in protecting your lug nut and wheel studs, but they’re a great way to achieve a more polished, cleaner look at a low-cost.  Here are some of the coolest-l

    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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  • 3 Layer Replacement Air Filter Wrap For 29-090500008 High Performance Air Filter

    3 Layer Replacement Air Filter Wrap For 29-090500008 High Performance Air Filter

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    $383.99
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    29-090500010
    SKU:
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    Truck Class:
    Heavy Duty
    Make:
    Western Star
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    $383.99
    Qty in Cart: 0
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    Subtotal:
  • 3 Layer Replacement Air Filter Wrap For 29-090500015 High Performance Air Filter

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    $383.99
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    29-090500016
    SKU:
    29-090500016
    Truck Class:
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    Make:
    Peterbilt
    Product Type:
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    $383.99
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    Subtotal:
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    29-090500023
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    Truck Class:
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    Make:
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    $383.99
    Qty in Cart: 0
    Price:
    $383.99
    Subtotal:
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    FLEET FILTERS

    $383.99
    3 Layer Replacement Air Filter Wrap For High Performance Air Filter* High Quality Replacement Air Filter Wrap* For 29-090500024* 3 Layer Design* Does Not Come Pre-Oiled* Oil Is Required Before...
    29-090500026
    SKU:
    29-090500026
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Make:
    Peterbilt
    Product Type:
    Exterior
    $383.99
    Qty in Cart: 0
    Price:
    $383.99
    Subtotal:
  • 3 Layer Replacement Air Filter Wrap For 29-090500002 High Performance Air Filter

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    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:
  • 3 Layer Replacement Air Filter Wrap For 29-090500004 High Performance Air Filter

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    $383.99
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    SKU:
    29-090500007
    Truck Class:
    Heavy Duty
    Make:
    Mack
    Make:
    Kenworth
    Make:
    Freightliner
    Make:
    Peterbilt
    Make:
    GMC
    Product Type:
    Exterior
    $383.99
    Qty in Cart: 0
    Price:
    $383.99
    Subtotal:
  • 3 Layer Replacement Air Filter Wrap For 29-090500017 High Performance Air Filter

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    FLEET FILTERS

    $383.99
    3 Layer Replacement Air Filter Wrap For High Performance Air Filter* High Quality Replacement Air Filter Wrap* For 29-090500017* 3 Layer Design* Does Not Come Pre-Oiled* Oil Is Required Before...
    29-090500019
    SKU:
    29-090500019
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Make:
    Kenworth
    Product Type:
    Exterior
    $383.99
    Qty in Cart: 0
    Price:
    $383.99
    Subtotal:
  • On Sale
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    3 Layer Replacement Air Filter Wrap For 29-090500011 High Performance Air Filter

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    29-090500013
    SKU:
    29-090500013
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Make:
    Kenworth
    Product Type:
    Exterior
    Ready To Ship:
    Yes
    Now: $157.94
    Was: $383.99
    Qty in Cart: 0
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    Now: $157.94
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    Subtotal:
  • 3 Layer Replacement Air Filter Wrap For 29-090500027 High Performance Air Filter For Kenworth, Peterbilt

    3 Layer Replacement Air Filter Wrap For 29-090500027 High Performance Air Filter For Kenworth, Peterbilt

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    29-090500029
    SKU:
    29-090500029
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Make:
    Kenworth
    Product Type:
    Exterior
    $383.99
    Qty in Cart: 0
    Price:
    $383.99
    Subtotal:
  • On Sale
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    High Flow Performance Air Filter With Washable Element Media For Peterbilt - Pair

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    SKU:
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    Truck Class:
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    Product Type:
    Exterior
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    Now: $325.13
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    Subtotal:
  • 1-Piece Stainless Steel Diesel Particulate Filter Replaces 21716414, 21716416 For Volvo/Mack MP7, MP8 Engines

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    29-080600050
    SKU:
    29-080600050
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Mack
    Make:
    Volvo
    Product Type:
    Exhaust
    $2,324.99
    Qty in Cart: 0
    Price:
    $2,324.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Klotz Foam Filter Oil Blocks Out Moisture, Dirt, Water - 15.25 Oz. Aerosol

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    $24.13
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    09-090500001
    SKU:
    09-090500001
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $24.13
    Qty in Cart: 0
    Price:
    $24.13
    Subtotal:
  • On Sale
    Limited Quantity Available
    High Flow Performance Air Filter With Washable Element Media For Freightliner and Volvo - Pair

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    29-090500021
    SKU:
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    Truck Class:
    Heavy Duty
    Make:
    Freightliner
    Product Type:
    Exterior
    Ready To Ship:
    Yes
    Now: $325.13
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    Now: $325.13
    Was: $839.99
    Subtotal:
  • High Flow Performance Air Filter With Washable Element Media For GM, Freightliner, Mack, Western Star - Pair

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    29-090500008
    SKU:
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    Truck Class:
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    Make:
    Freightliner
    Product Type:
    Exterior
    $839.99
    Qty in Cart: 0
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    $839.99
    Subtotal:
  • High Flow Performance Air Filter With Washable Element Media For Peterbilt, Kenworth, Mack - Pair

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

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    29-090500002
    SKU:
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    Truck Class:
    Heavy Duty
    Make:
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    Make:
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    Product Type:
    Exterior
    Ready To Ship:
    Yes
    $839.99
    Qty in Cart: 0
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    Subtotal:
  • High Flow Performance Air Filter With Washable Element Media For Kenworth T800, Peterbilt 388 - Pair

    High Flow Performance Air Filter With Washable Element Media For Kenworth T800, Peterbilt 388 - Pair

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    29-090500024
    SKU:
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    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Make:
    Peterbilt
    Product Type:
    Exterior
    $839.99
    Qty in Cart: 0
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    $839.99
    Subtotal:
  • High Flow Performance Air Filter With Washable Element Media For Kenworth, Peterbilt & Western Star - Pair

    High Flow Performance Air Filter With Washable Element Media For Kenworth, Peterbilt & Western Star - Pair

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    $839.99
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    29-090500014
    SKU:
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    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Make:
    Peterbilt
    Product Type:
    Exterior
    $839.99
    Qty in Cart: 0
    Price:
    $839.99
    Subtotal:
  • High Flow Performance Air Filter With Washable Element Media For PACCAR, GM, Freightliner, Mack - Pair

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    $839.99
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    29-090500005
    SKU:
    29-090500005
    Truck Class:
    Heavy Duty
    Make:
    GMC
    Make:
    Freightliner
    Make:
    Peterbilt
    Make:
    Kenworth
    Make:
    Bus
    Make:
    Mack
    Product Type:
    Exterior
    $839.99
    Qty in Cart: 0
    Price:
    $839.99
    Subtotal:
  • High Flow Performance Air Filter W/ Washable Element For Freightliner, Kenworth, Peterbilt & Western Star - Pair

    High Flow Performance Air Filter W/ Washable Element For Freightliner, Kenworth, Peterbilt & Western Star - Pair

    FLEET FILTERS

    $839.99
    High Flow Performance Air Filter W/ Washable Element Fits Freightliner, Kenworth, Peterbilt, Western Star - PairYou never need to waste money on paper filters again! 4 State Trucks proudly offers...
    29-090500017
    SKU:
    29-090500017
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Make:
    Kenworth
    Product Type:
    Exterior
    $839.99
    Qty in Cart: 0
    Price:
    $839.99
    Subtotal:
  • High Flow Performance Air Filter With Washable Element Media For Kenworth T800 & Peterbilt 388 - Pair

    High Flow Performance Air Filter With Washable Element Media For Kenworth T800 & Peterbilt 388 - Pair

    FLEET FILTERS

    $839.99
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    29-090500027
    SKU:
    29-090500027
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Make:
    Kenworth
    Product Type:
    Exterior
    $839.99
    Qty in Cart: 0
    Price:
    $839.99
    Subtotal:
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