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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

    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

    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

    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

    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

    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

    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
    BESTfit Intermediate Elbow Replaces M66-1215 For Kenworth T600, T800 & W900

    BESTfit Intermediate Elbow Replaces M66-1215 For Kenworth T600, T800 & W900

    BESTFIT TRUCK PARTS

    $215.99
    BESTfit Intermediate Elbow Fits Kenworth 1986-2006* High Quality Elbow* Made Of Aluminized Steel* Located on Driver Side Between the Exhaust Tee Flex Pipe and BOM Elbow* Sold Individually* Warranty...
    02-08112150
    SKU:
    02-08112150
    Truck Class:
    Heavy Duty
    Style Options:
    Elbow
    Material Options:
    Aluminized Steel
    Make:
    Kenworth
    Diameter Options:
    5 Inch
    Degree Options:
    45
    Product Type:
    Exhaust
    Ready To Ship:
    Yes
    $215.99
    Qty in Cart: 0
    Price:
    $215.99
    Subtotal:
  • Ridewell RCA-215HM High Mount Lift Axle - Pre-plumbed W/ Outside Monitor

    Ridewell RCA-215HM High Mount Lift Axle - Pre-plumbed W/ Outside Monitor

    RIDEWELL

    $6,109.99
    Ridewell RCA-215HM High Mount Lift Axle - Professional Pre-Plumbed SystemEnhance your vehicle's load-bearing capabilities with the premium Ridewell RCA-215HM system. This professional-grade solution...
    2150205-01
    SKU:
    2150205-01
    Product Type:
    Frame & Chassis
    $6,109.99
    Qty in Cart: 0
    Price:
    $6,109.99
    Subtotal:
  • BESTfit D13 Flywheel Replaces 21514067 For Mack MP8 & Volvo

    BESTfit D13 Flywheel Replaces 21514067 For Mack MP8 & Volvo

    BESTFIT TRUCK PARTS

    $442.99
    BESTfit Flywheel For Mack MP8 & Volvo D13 Engines* High Quality Flywheel* For Mack MP8 And Volvo D13* Sold Individually* Warranty On Flywheels Against Defects In Workmanship & Material From Date Of...
    29-0721514067
    SKU:
    29-0721514067
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Mack
    Make:
    Volvo
    Product Type:
    Engine Parts
    $442.99
    Qty in Cart: 0
    Price:
    $442.99
    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:
  • RigMaster Electric Fan Temperature Sensor Kit For Caterpillar, Perkins Engines

    RigMaster Electric Fan Temperature Sensor Kit For Caterpillar, Perkins Engines

    RIGMASTER

    $65.99
    Temperature Sensor Kit For Electric Fan - RP7-215A-K* High Quality Temperature Sensor Kit * For Electric Fan * Sold Individually * Warranty On Temperature Sensor Kits Against Defects In Workmanship &...
    RP7215AK
    SKU:
    RP7215AK
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $65.99
    Qty in Cart: 0
    Price:
    $65.99
    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:
  • FREE SHIPPING OVER $249
    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:
  • 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:
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    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
    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:
  • Shackle Wear Plate Type 17 For Mack, Volvo, Hendrickson

    Shackle Wear Plate Type 17 For Mack, Volvo, Hendrickson

    AUTOMANN USA

    $11.55
    Hendrickson Shackle Plate For RB Bushing* High Quality Shackle Plate* Dimensions:  - 207 MM Length  - 164 MM Width  - 124 MM C To C  - 21 MM Height* For RB Bushing* Side Bar Type- 17* Sold...
    29-05091215
    SKU:
    29-05091215
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Volvo
    Make:
    Mack
    Product Type:
    Frame & Chassis
    $11.55
    Qty in Cart: 0
    Price:
    $11.55
    Subtotal:
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    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
    Black Plastic Cab Fresh Filter For Freightliner Cascadia, Century, Columbia & Coronado

    Black Plastic Cab Fresh Filter For Freightliner Cascadia, Century, Columbia & Coronado

    CAB FRESH FILTER CO.

    $51.99
    Cab Fresh Filter Fits FreightlinerReplace your original filter with this cab fresh filter with a charcoal spor-ax antimicrobial layer. This charcoal layer has adsorption properties that help capture...
    03-091305
    SKU:
    03-091305
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Make:
    Freightliner
    Color:
    Black
    Product Type:
    Exterior
    $51.99
    Qty in Cart: 0
    Price:
    $51.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Chrome LED Indicator Light - Green

    Chrome LED Indicator Light - Green

    VELVAC

    $7.34
    Green LED Indicator LightThis green LED indicator light features chrome plated housing and mounts in a 7/16 inch hole. It is rated for 15mA at 12VDC and has a 100,000 hours estimated bulb life...
    090215
    SKU:
    090215
    Truck Class:
    Universal
    Make:
    Universal Items
    Color:
    Green
    Product Type:
    Lighting
    $7.34
    Qty in Cart: 0
    Price:
    $7.34
    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:
  • TPHD 80 Inch Stainless Steel Half Fenders With Extra Long Front Drop, 14 Gauge

    TPHD 80 Inch Stainless Steel Half Fenders With Extra Long Front Drop, 14 Gauge

    TPHD

    $764.99
    80 Inch 14 Gauge Stainless Steel Low Straight Drop Half Fenders By TPHDIntroducing the 80-inch Low Straight Drop Half Fenders crafted from durable 14-gauge stainless steel by TPHD. These 80-inch low...
    09-11030215
    SKU:
    09-11030215
    Truck Class:
    Universal
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Finish Options:
    Polished
    Product Type:
    Rear Fenders
    Height Options:
    35 Inch
    Style Options:
    Half Fender
    Length Options:
    80 Inch
    Location:
    Made In USA
    Width Options:
    24 Inch
    Size Options:
    14 Gauge
    Ready To Ship:
    Yes
    $764.99
    Qty in Cart: 0
    Price:
    $764.99
    Subtotal:
  • FREE SHIPPING OVER $249
    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
    CAT Fuel Filter FF5319 3406 C-E

    CAT Fuel Filter FF5319 3406 C-E

    OPP - ORIGINAL PARTS PROGRAM

    $21.42
    FF5319 CAT Fuel Filter 3406 C-EThis Fleetguard Spin-On Fuel Filter actively filters and improves fuel efficiency for your vehicle. It removes contaminants, enhances engine performance, and reduces...
    FF5319FLG
    SKU:
    FF5319FLG
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Make:
    Freightliner
    Make:
    International
    Make:
    Other - Semi-Truck
    Make:
    Kenworth
    Make:
    Peterbilt
    Make:
    Mack
    Make:
    Volvo
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $21.42
    Qty in Cart: 0
    Price:
    $21.42
    Subtotal:
  • FREE SHIPPING OVER $249
    Cab Fresh HVAC Pre-Filter W/ Black Housing For Peterbilt & Kenworth

    Cab Fresh HVAC Pre-Filter W/ Black Housing For Peterbilt & Kenworth

    CAB FRESH FILTER CO.

    $50.99
    Air Filter HVAC Pre-FilterHelp protect your cab's HVAC system with this complete pre-filter assembly featuring a durable housing and replaceable filter element. Designed to capture dust, debris, and...
    29-091300
    SKU:
    29-091300
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $50.99
    Qty in Cart: 0
    Price:
    $50.99
    Subtotal:
  • Turnpike Truck Trim Peterbilt 378 / 379 Solid Mount Fender Guards For Rectangle Headlights - Stainless Steel

    Turnpike Truck Trim Peterbilt 378 / 379 Solid Mount Fender Guards For Rectangle Headlights - Stainless Steel

    TURNPIKE TRUCK TRIM

    $135.99
    Peterbilt 379 & 378 Single Headlight Fender GuardsProtect the area around your headlights with these stainless steal blank headlight guards. Fit for Peterbilt 387 and 389 models, these solid mount...
    01-12215
    SKU:
    01-12215
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Peterbilt
    Product Type:
    Hood Parts & Acc.
    Ready To Ship:
    Yes
    $135.99
    Qty in Cart: 0
    Price:
    $135.99
    Subtotal:
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