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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

    How to Choose the Right W990 Drop Visor(Post)

    The best Kenworth W990 drop visor depends on your design preference, mounting configuration, and windshield type or cab style (curved or flat). Buying a Custom W990 Truck Visor Online?  If you're brow

    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. 

    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

    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

    T880 Visor Ultimate Buyer's Guide(Post)

    There are countless Kenworth T880 visor options to choose from depending on the theme and style you’re going for. Here's a quick buyer's guide for Kenworth T880 aftermarket visors. Before you buy, con

    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

    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

    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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  • 1-Piece Stainless Steel Diesel Particulate Filter Replaces 2888249NX, 4969542NX, 4965317NX For Cummins ISX Engine

    1-Piece Stainless Steel Diesel Particulate Filter Replaces 2888249NX, 4969542NX, 4965317NX For Cummins ISX Engine

    GLOBAL EMISSIONS

    $2,264.99
    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...
    29-080600054
    SKU:
    29-080600054
    Truck Class:
    Heavy Duty
    Style Options:
    Cummins
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Exhaust
    $2,264.99
    Qty in Cart: 0
    Price:
    $2,264.99
    Subtotal:
  • BESTfit CAT Diesel Particulate Filter For Caterpillar C13/C15 Engine Replaces 10R6089, 46003, CQ1704C

    BESTfit CAT Diesel Particulate Filter For Caterpillar C13/C15 Engine Replaces 10R6089, 46003, CQ1704C

    BESTFIT TRUCK PARTS

    $3,767.99
    CAT Diesel Particulate Filter By BESTfit Replaces 10R6089, 46003, CQ1704C Fits Caterpillar C13/C15 EngineMaintain peak performance and emissions compliance with the BESTfit CAT DPF for Caterpillar...
    29-08090054
    SKU:
    29-08090054
    Style Options:
    Caterpillar
    Product Type:
    Exhaust
    Make:
    Universal Items
    $3,767.99
    Qty in Cart: 0
    Price:
    $3,767.99
    Subtotal:
  • FREE SHIPPING OVER $249
    TPHD Control Valve Air Suspension Normally Open

    TPHD Control Valve Air Suspension Normally Open

    TURNPIKE TRUCK TRIM

    $67.99
    12V Control Valve Air By TPHDMaintain consistent air suspension performance with the TPHD Control Valve Air Suspension Normally Open. With a 3-way configuration, 1/4-inch NPT fitting, and 12-volt...
    90054075GTA
    SKU:
    90054075GTA
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $67.99
    Qty in Cart: 0
    Price:
    $67.99
    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:
  • Trunnion Bushing 4 ID X 4.25 OD X 4.28 Inch OAL For Mack

    Trunnion Bushing 4 ID X 4.25 OD X 4.28 Inch OAL For Mack

    AFTERMARKET

    $83.99
    Mack Trunnion BushingReplace worn suspension components with confidence using this engineered Trunnion Bushing for Mack trucks. With 4.00-inch inner diameter, 4.25-inch outer diameter, and 4.28-inch...
    11-05100054
    SKU:
    11-05100054
    Material Options:
    Brass
    Truck Class:
    Heavy Duty
    Make:
    Mack
    Product Type:
    Frame & Chassis
    $83.99
    Qty in Cart: 0
    Price:
    $83.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Chrome Plastic Light Bezel 2 Inch W/ Visor, Twist On

    Chrome Plastic Light Bezel 2 Inch W/ Visor, Twist On

    TRUX ACCESSORIES

    $3.69
    Twist On 2 Inch Chrome Plastic Light Bezel W/ VisorNeed something extra to accent your lights? This seamless, 2-inch bezel from 4 State Trucks with lock-on technology is the perfect addition to your...
    09-1605054
    SKU:
    09-1605054
    Truck Class:
    Universal
    Diameter Options:
    2 Inch
    Shape Options:
    Round
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Product Type:
    Lighting
    Ready To Ship:
    Yes
    Style Options:
    Twist On
    $3.69
    Qty in Cart: 0
    Price:
    $3.69
    Subtotal:
  • FASS Signature Series Fuel System- 250 F, 220 GPH, 55 PSI For Ford F250/F350 Super Duty Powerstroke 6.0L/7.3L

    FASS Signature Series Fuel System- 250 F, 220 GPH, 55 PSI For Ford F250/F350 Super Duty Powerstroke 6.0L/7.3L

    FASS

    $855.99
    220 GPH Signature Series Fuel System For Powerstroke 6.0L/7.3L Engine 1999-2007 Fits Ford F250/F350 Super Duty Powerstroke 6.0L/7.3LImprove fuel system performance and reliability with the FASS...
    05-07030054
    SKU:
    05-07030054
    Type Options:
    Bolt Mount
    Position:
    Kit Full
    Product Type:
    Engine Parts
    Style Options:
    Powerstroke
    Make:
    Ford
    $855.99
    Qty in Cart: 0
    Price:
    $855.99
    Subtotal:
  • FASS Signature Series Fuel System- 250F, 220 GPH, 70-75 PSI For GMC/Chevrolet 2500/3500HD Duramax 6.6L

    FASS Signature Series Fuel System- 250F, 220 GPH, 70-75 PSI For GMC/Chevrolet 2500/3500HD Duramax 6.6L

    FASS

    $907.99
    220 GPH Signature Series Fuel SystemBoost fuel system performance and injector protection on your GMC/Chevrolet 2500/3500HD Duramax 6.6L with the FASS Signature Series Fuel System (220 GPH), built...
    12-07030054
    SKU:
    12-07030054
    Style Options:
    Duramax
    Product Type:
    Engine Parts
    Position:
    Kit Full
    Make:
    Chevrolet
    Make:
    GMC
    $907.99
    Qty in Cart: 0
    Price:
    $907.99
    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:
  • 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:
  • BESTfit 14.3125 X 13.5 Inch DPF Gasket For Volvo W/ Cummins Engines

    BESTfit 14.3125 X 13.5 Inch DPF Gasket For Volvo W/ Cummins Engines

    BESTFIT TRUCK PARTS

    $18.59
    14.3125 X 13.5 Inch DPF Gasket By BESTfitKeep your diesel particulate filter system secure and efficient with the BESTfit 14.3125 x 13.5 Inch DPF Gasket for Volvo trucks powered by Cummins engines...
    GR-GRDPFG-1054-10
    SKU:
    GR-GRDPFG-1054-10
    Style Options:
    Cummins
    Product Type:
    Exhaust
    Make:
    Volvo
    $18.59
    Qty in Cart: 0
    Price:
    $18.59
    Subtotal:
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    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:
  • 1-Piece Stainless Steel Diesel Particulate Filter Replaces 21905492, 85001353 For Mack/Volvo MP7/MP8 Engines

    1-Piece Stainless Steel Diesel Particulate Filter Replaces 21905492, 85001353 For Mack/Volvo MP7/MP8 Engines

    GLOBAL EMISSIONS

    $2,070.99
    1-Piece Stainless Steel Diesel Particulate Filter Fits Mack/Volvo MP7 & MP8 Engines* High Quality Diesel Particulate Filter* Made Of Stainless Steel * Exclusive 1-Piece Canister Design For...
    29-080600031
    SKU:
    29-080600031
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Volvo
    Make:
    Mack
    Product Type:
    Exhaust
    $2,070.99
    Qty in Cart: 0
    Price:
    $2,070.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 4 Inch Non-Locking Lever Style Fuel Cap For Peterbilt

    BESTfit 4 Inch Non-Locking Lever Style Fuel Cap For Peterbilt

    BESTFIT TRUCK PARTS

    $75.99 - $689.99
    Choose Option(s) to see description.Fitment* Fits Peterbilt 330 1995 thru 2005* Fits Peterbilt 335 2005 thru 2010* Fits Peterbilt 337 2011 thru 2022* Fits Peterbilt 352 1972 thru 1980* Fits Peterbilt...
    PPR_300546
    SKU:
    PPR_300546
    Truck Class:
    Heavy Duty
    Product Type:
    Fuel Tanks
    Material Options:
    Aluminum
    Diameter Options:
    4 Inch
    Style Options:
    Non Vented
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    $75.99 - $689.99
    Qty in Cart: 0
    Price:
    $75.99 - $689.99
    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
    Ready To Ship:
    Yes
    $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
    CSM Stainless Steel Fuel Tank Strap Kit For Peterbilt W/ 26 Inch Diameter Tanks

    CSM Stainless Steel Fuel Tank Strap Kit For Peterbilt W/ 26 Inch Diameter Tanks

    CHROME SHOP MAFIA

    $411.99 - $679.99
    Secure and protect your Peterbilt's 26-inch diameter fuel tank with the CSM Stainless Steel Fuel Tank Strap Kit by Chrome Shop Mafia. Available in two sizes-8-inch and 4-inch-these high-quality strap...
    PPR_300542
    SKU:
    PPR_300542
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Width Options:
    4 Inch
    Finish Options:
    Polished
    Position:
    Kit Full
    Product Type:
    Fuel Tanks
    Width Options:
    8 Inch
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    Diameter Options:
    26 Inch
    $411.99 - $679.99
    Qty in Cart: 0
    Price:
    $411.99 - $679.99
    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:
  • 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:
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