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    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

    Top Semi Trucks Owned in Each State (Data for All 50 States) (Post)

    Here's some visual data on the most commonly owned heavy duty semi truck models based upon three popular truck brands: Peterbilt, Kenworth, and Freightliner. DISCLAIMER: (as of 2025) this data is four

    Common Steering Problems on Peterbilt 379 Trucks(Post)

    Here are some of the most common steering problems found on older Peterbilt 379 models, how to diagnose those issues, and how to prevent them. Related Posts:  How to Replace a Peterbilt Steering Shaf

    How to Find the Right FL70 Parts Using Your VIN(Post)

    To identify the right Freightliner FL70 parts, you must use your 17-digit VIN and the factory spec decal inside your cab, rather than relying on the exterior model badge. Because FL70 and FL80 Busines

    How to Choose the Best Fridge for Your Semi Truck(Post)

    Every OTR truck driver needs reliable cooling for food and beverages on long haul drives. That's where semi truck refrigerators come in handy. When it comes to buying this must-have accessory, what's

    What Should Be in a Semi Truck Emergency Kit? (Free PDF Checklist for Drivers)(Post)

    Semi-truck breakdowns cost money and time; but they aren't inevitable. With the right emergency accessories, truck drivers can minimize costly delays, tackle minor repairs on the fly, and safely power

    A Buyer's Guide to Semi Truck Toolbox Storage(Post)

    If there's one thing that a truck driver needs it's more storage space. Buying the right heavy-duty commercial truck storage boxes is one of the most useful purchases you can make. Here are some of t

    Top 10 Semi Truck Winter Accessories for Heavy-Duty Drivers(Post)

    Winter truck driving can be downright trecherous to haul payloads in, especially when you don't have the right winter-ready trucker gear to get you through difficult drives in below-freezing temperatu

    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

    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

    Haul of Fame: The Murder Pete Truck(Post)

    They call it the Murder Pete. Blacked-out, rugged, and raw, it’s a notorious big rig known for its “murdered out” style. Supported by the custom fab shop work of Chrome Shop Mafia (CMS) and supplied w

    CB Radios Ultimate Guide(Post)

    “10-4 Roger.” Despite the rise of messaging apps, GPS devices with voice-activated messaging, and push-to-talk (PTT) apps, the classic CB radio remains among the most trusted and well-used accessorie

    What are the Best Heavy-Duty Front Bumper Marker Lights?(Post)

    If you’re looking to start customizing your front bumper with marker lighting, your design options are nearly limitless. If you can dream it, we can build it, then ship it to you or an installation sh

    Best Peterbilt Chrome Upgrades (Interior & Exterior Cab)(Post)

    When it comes to upgrading your Peterbilt truck with chrome accessories, the aftermarket options are virtually endless.  If you're looking to add a bit more personalization to your rig than the tradit

    8 Signs Your Peterbilt 379 Steering Shaft Needs Replacement(Post)

    Steering issues on a Class 8 heavy-duty truck are a critical safety concern, and recognizing the bad steering shaft symptoms Peterbilt 379 trucks exhibit is vital for every owner-operator. If you noti

    How to Prep Your Truck for a Truck Show(Post)

    Getting a working semi-truck ready for a show is a massive undertaking that goes far beyond a standard weekend wash. A winning presentation separates immediate show preparation from long-term customiz

    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

    What Are the Best Floor Mats for My Semi Truck Model?(Post)

    Semi truck floor mats aren’t just a protective element against food or drink spills or stains brought in by mud and snow; they can add some style to your commercial vehicle.  Why Floor Mats Matter in

    Most Common Replacement Parts for Freightliner FL70(Post)

    Freightliner FL70/FL80 Business Class trucks see a lot of wear and tear while running job sites. The parts that risk quick replacement are those that see the most pressure and stress, like the suspens

    How to Customize Your Semi Truck On a Budget(Post)

    Let's be honest. Customizing a semi truck with aftermarket parts and accessories isn't cheap, even if you're shopping for special bargain-priced deals. It also depends on how flexible your actual "bud

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    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:
  • FREE SHIPPING OVER $249
    Interior Cab Fresh Air Filter For Peterbilt 330, 335, 340, 357, 367, 377, 378, 379, 385 & 386

    Interior Cab Fresh Air Filter For Peterbilt 330, 335, 340, 357, 367, 377, 378, 379, 385 & 386

    CAB FRESH FILTER CO.

    $46.73
    Peterbilt Cab Fresh Air FilterThis air filter is easy to install under the dash. Just slide it into the existing OEM track located by the passenger door. Follow these simple steps, and you'll have it...
    01-1503018
    SKU:
    01-1503018
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Material Options:
    Cloth
    Make:
    Peterbilt
    Product Type:
    Interior
    Ready To Ship:
    Yes
    $46.73
    Qty in Cart: 0
    Price:
    $46.73
    Subtotal:
  • Air Intake Pre - Filter For Side Of Hood For Volvo VNL Gen I 1998 - 2003

    Air Intake Pre - Filter For Side Of Hood For Volvo VNL Gen I 1998 - 2003

    FREEDOM AIR FILTERS

    $52.99
    Air Intake Pre-Filter On Side Of Hood Fits Volvo VNL Version 1 1997-2003Increase the efficiency of your filters by keeping them clean longer. This quality air intake pre-filter deflects large debris...
    13-12318
    SKU:
    13-12318
    Truck Class:
    Heavy Duty
    Color:
    Black
    Material Options:
    Plastic/Poly
    Make:
    Volvo
    Product Type:
    Hood Parts & Acc.
    $52.99
    Qty in Cart: 0
    Price:
    $52.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Chrome Hood Air Intake Pre-Filter For Volvo VNL Gen II

    Chrome Hood Air Intake Pre-Filter For Volvo VNL Gen II

    CAB FRESH FILTER CO.

    $192.99
    Air Intake Pre-Filter On Hood Fits Volvo VNL 2004-2018Looking to upgrade your Volvo VNL? Check out these chrome pre-filters for hood air intakes. They fit models from 2004 to 2018 and slip right over...
    13-12305
    SKU:
    13-12305
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Make:
    Volvo
    Finish Options:
    Chrome-Plated
    Product Type:
    Hood Parts & Acc.
    $192.99
    Qty in Cart: 0
    Price:
    $192.99
    Subtotal:
  • On Sale
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    Chrome AC Heater Filter Door For Peterbilt

    Chrome AC Heater Filter Door For Peterbilt

    UNITED PACIFIC

    Now: $21.74
    Was: $31.06
    Air Filter Door Fits Peterbilt* High Quality Filter Door* Made Of Chrome Plated Plastic* Sold Individually* Warranty On Filter Door Against Defects In Workmanship & Material From Date Of...
    01-1503015
    SKU:
    01-1503015
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Make:
    Peterbilt
    Finish Options:
    Chrome-Plated
    Product Type:
    Interior
    Ready To Ship:
    Yes
    Now: $21.74
    Was: $31.06
    Qty in Cart: 0
    Price:
    Now: $21.74
    Was: $31.06
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    High Flow Performance Air Filter With Washable Element Media For Freightliner and Volvo - Pair

    High Flow Performance Air Filter With Washable Element Media For Freightliner and Volvo - Pair

    FLEET FILTERS

    Now: $325.13
    Was: $839.99
    High Performance Air Filter Media Fits Freightliner and Volvo - PairYou never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime, washable,...
    29-090500021
    SKU:
    29-090500021
    Truck Class:
    Heavy Duty
    Make:
    Freightliner
    Product Type:
    Exterior
    Ready To Ship:
    Yes
    Now: $325.13
    Was: $839.99
    Qty in Cart: 0
    Price:
    Now: $325.13
    Was: $839.99
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    FS1040 Fuel Filter Cummins ISX

    FS1040 Fuel Filter Cummins ISX

    OPP - ORIGINAL PARTS PROGRAM

    $59.99
    FS1040 Fuel Filter Cummins ISX* High Quality Fuel Filter* Sold Individually* Warranty On Fuel Filter Against Defects In Workmanship & Material From Date Of Purchase*** High Quality Aftermarket...
    FS1040FLG
    SKU:
    FS1040FLG
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $59.99
    Qty in Cart: 0
    Price:
    $59.99
    Subtotal:
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    LF3970 Fleetguard Oil Filter Cummins ISB

    LF3970 Fleetguard Oil Filter Cummins ISB

    OPP - ORIGINAL PARTS PROGRAM

    $18.66
    LF3970 Fleetguard Oil Filter Cummins ISB* High Quality Filter Oil* Sold Individually* Warranty On Fuel Filter Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...
    LF3970FLG
    SKU:
    LF3970FLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $18.66
    Qty in Cart: 0
    Price:
    $18.66
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    Fleetguard Fuel Filter 3406 A-B

    Fleetguard Fuel Filter 3406 A-B

    OPP - ORIGINAL PARTS PROGRAM

    $23.39
    Fleetguard Fuel Filter 3406 A-B* High Quality Fuel Filter* Sold Individually* Fits Many Makes And Models Of Trucks* Warranty On Fuel Filters Against Defects In Workmanship & Material From Date Of...
    FF5264FLG
    SKU:
    FF5264FLG
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $23.39
    Qty in Cart: 0
    Price:
    $23.39
    Subtotal:
  • FREE SHIPPING OVER $249
    Caterpillar 1R0716 Spin-On Oil Filter

    Caterpillar 1R0716 Spin-On Oil Filter

    OPP - ORIGINAL PARTS PROGRAM

    $49.31
    Caterpillar 1R0716 Oil Filter* High Quality Oil Filter* Spin-On Filter* Efficiency Rating: Standard Efficiency* Height 307MM* Installation Type: Spin-On* Diameter / Length: 135.8MM* Media Type:...
    1R0716
    SKU:
    1R0716
    Truck Class:
    Universal
    Location:
    Made In USA
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $49.31
    Qty in Cart: 0
    Price:
    $49.31
    Subtotal:
  • FREE SHIPPING OVER $249
    FF105FLG Cummins Short Fuel Filter

    FF105FLG Cummins Short Fuel Filter

    OPP - ORIGINAL PARTS PROGRAM

    $14.33
    FF105 Cummins Short Fuel FilterDealing with fuel issues? The Fleetguard Cummins FF105 spin-on filter can help. Compatible with Cummins 154709, it efficiently filters out impurities, ensuring your...
    FF105FLG
    SKU:
    FF105FLG
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $14.33
    Qty in Cart: 0
    Price:
    $14.33
    Subtotal:
  • Fuel Filter Water Separator Spin On FS19684 For International 4300 W/ T466

    Fuel Filter Water Separator Spin On FS19684 For International 4300 W/ T466

    OPP - ORIGINAL PARTS PROGRAM

    $23.76
    Spin On Fuel Filter Water Separator* High Quality Fuel Filter And Water Separator* Overall Height 5.58 Inch (41.73 Mm)* End 2 OD 3.57 Inch (90.68 Mm)* Largest OD 3.74 Inch (95 Mm)* End 2 Id .82 Inch...
    FS19684EFLG
    SKU:
    FS19684EFLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $23.76
    Qty in Cart: 0
    Price:
    $23.76
    Subtotal:
  • FREE SHIPPING OVER $249
    FF2200FLG Cummins ISX Fuel Filter

    FF2200FLG Cummins ISX Fuel Filter

    OPP - ORIGINAL PARTS PROGRAM

    $32.90
    Fleetguard Filter-Fuel ID: FF2200* High Quality Fuel Filter* Sold Individually* Warranty On Fuel Filters Against Defects In Workmanship & Material From Date Of Purchase*** This Is An OEM Replacement...
    FF2200FLG
    SKU:
    FF2200FLG
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $32.90
    Qty in Cart: 0
    Price:
    $32.90
    Subtotal:
  • FREE SHIPPING OVER $249
    FF5632 Fleetguard Fuel Filter Cummins ISB

    FF5632 Fleetguard Fuel Filter Cummins ISB

    OPP - ORIGINAL PARTS PROGRAM

    $33.40
    FF5632 Fleetguard Fuel Filter Cummins ISB* High Quality Fuel Filter* Sold Individually* Warranty On Fuel Filter Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...
    FF5632FLG
    SKU:
    FF5632FLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $33.40
    Qty in Cart: 0
    Price:
    $33.40
    Subtotal:
  • FREE SHIPPING OVER $249
    FF2203 Fleetguard Fuel Filter Cummins ISX

    FF2203 Fleetguard Fuel Filter Cummins ISX

    OPP - ORIGINAL PARTS PROGRAM

    $40.85
    FF2203 Fleetguard Fuel Filter Cummins ISX* High Quality Fuel Filter* Alternate Fuel/Water Separator With Drain FS1023* Replaces OEM # 4010476* Sold Individually* Warranty On Fuel Filters Against...
    FF2203FLG
    SKU:
    FF2203FLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $40.85
    Qty in Cart: 0
    Price:
    $40.85
    Subtotal:
  • FREE SHIPPING OVER $249
    FF5686 Fleetguard Fuel Filter Cummins ISX

    FF5686 Fleetguard Fuel Filter Cummins ISX

    OPP - ORIGINAL PARTS PROGRAM

    $103.99
    FF5686 Fleetguard Fuel Filter Cummins ISX* High Quality Fuel Filter* Sold Individually* Warranty On Fuel Filter Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...
    FF5686FLG
    SKU:
    FF5686FLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $103.99
    Qty in Cart: 0
    Price:
    $103.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Caterpillar 1R0749 Secondary Fuel Filter

    Caterpillar 1R0749 Secondary Fuel Filter

    OPP - ORIGINAL PARTS PROGRAM

    $40.57
    Caterpillar Secondary Fuel FilterSecondary Fuel Filters Capture The Smaller Particles That Do The Most Damage To Fuel Injectors And Other Fuel System Components.* High Quality Fuel Filter* Height...
    1R0749
    SKU:
    1R0749
    Truck Class:
    Universal
    Location:
    Made In USA
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $40.57
    Qty in Cart: 0
    Price:
    $40.57
    Subtotal:
  • 1-Piece Stainless Steel Diesel Particulate Filter Replaces 3103617, 3976606, 3978026 For Cummins ISC Engine

    1-Piece Stainless Steel Diesel Particulate Filter Replaces 3103617, 3976606, 3978026 For Cummins ISC Engine

    BESTFIT TRUCK PARTS

    $2,135.99
    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...
    29-080600039
    SKU:
    29-080600039
    Truck Class:
    Heavy Duty
    Style Options:
    Cummins
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Exhaust
    $2,135.99
    Qty in Cart: 0
    Price:
    $2,135.99
    Subtotal:
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    LF9009 Fleetguard Oil Filter Cummins ISC - ISL

    LF9009 Fleetguard Oil Filter Cummins ISC - ISL

    OPP - ORIGINAL PARTS PROGRAM

    $60.99
    LF9009 Fleetguard Oil Filter Cummins ISC - ISL* High Quality Oil Filter Cummins * Sold Individually* Warranty On Oil Filter Cummins Against Defects In Workmanship & Material From Date Of Purchase*|**...
    LF9009FLG
    SKU:
    LF9009FLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $60.99
    Qty in Cart: 0
    Price:
    $60.99
    Subtotal:
  • FREE SHIPPING OVER $249
    FF5207 Detroit 60 Series Fuel Filter

    FF5207 Detroit 60 Series Fuel Filter

    OPP - ORIGINAL PARTS PROGRAM

    $14.33
    Fleetguard FF5207 Spin-On FilterBest-in-class performance using advanced filtration media to remove harmful contaminants and ensure clean fuel systems.* High Quality Fuel Filter* VMRS044002002*...
    FF5207FLG
    SKU:
    FF5207FLG
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $14.33
    Qty in Cart: 0
    Price:
    $14.33
    Subtotal:
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