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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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  • 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:
  • High Flow Performance Air Filter With Washable Element Media For Volvo

    High Flow Performance Air Filter With Washable Element Media For Volvo

    FLEET FILTERS

    $444.99
    High Flow Performance Air Filter With Washable Element Media Fits VolvoYou never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime,...
    29-071300018
    SKU:
    29-071300018
    Truck Class:
    Heavy Duty
    Make:
    Volvo
    Product Type:
    Engine Parts
    $444.99
    Qty in Cart: 0
    Price:
    $444.99
    Subtotal:
  • Stainless Steel Diesel Particulate Filter Replaces 20869859, 20992181 For Mack, Volvo W/ MP7 Engine

    Stainless Steel Diesel Particulate Filter Replaces 20869859, 20992181 For Mack, Volvo W/ MP7 Engine

    GLOBAL EMISSIONS

    $2,020.99
    Stainless Steel Diesel Particulate Filter Fits Mack & Volvo W/ MP7 Engine* High Quality Diesel Particulate Filter* Made Of Stainless Steel * OEM Quality Clamps And Gaskets Included* Sold Individually...
    29-080600018
    SKU:
    29-080600018
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Mack
    Make:
    Volvo
    Product Type:
    Exhaust
    $2,020.99
    Qty in Cart: 0
    Price:
    $2,020.99
    Subtotal:
  • FASS Drop- In Series Fuel System Filter Pack W/ 2 Extreme Water Separator Filters & 2 Extended Life Particulate Filters

    FASS Drop- In Series Fuel System Filter Pack W/ 2 Extreme Water Separator Filters & 2 Extended Life Particulate Filters

    FASS

    $107.99
    Drop- In Series Fuel System Filter Pack W/ 2 Extreme Water Separator Filters & 2 Extended Life Particulate FiltersImprove fuel system protection and long-term performance with this FASS Drop-In...
    09-07030018
    SKU:
    09-07030018
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $107.99
    Qty in Cart: 0
    Price:
    $107.99
    Subtotal:
  • BESTfit 5 ID X 18.5 Inch Aluminized Steel Flare Pipe Replaces 04-26200-018 For Freightliner

    BESTfit 5 ID X 18.5 Inch Aluminized Steel Flare Pipe Replaces 04-26200-018 For Freightliner

    BESTFIT TRUCK PARTS

    $285.99
    5 ID X 18.5 Inch Aluminized Flare Pipe By BESTfitThe BESTfit 5 ID x 18.5 Inch Aluminized Steel Flare Pipe delivers dependable exhaust performance for Freightliner trucks. Made of aluminized steel,...
    GR-FL-26200-018
    SKU:
    GR-FL-26200-018
    Product Type:
    Exhaust
    $285.99
    Qty in Cart: 0
    Price:
    $285.99
    Subtotal:
  • 24 1/2 Inch Fixed Torque Rod Replaces 62362101800 For Freightliner

    24 1/2 Inch Fixed Torque Rod Replaces 62362101800 For Freightliner

    AFTERMARKET

    $259.99
    Fixed Torque Rod With 1 1/8 Inch Shaft Diameter* High Quality Torque Rod* 24 1/2 Inch C To C* 1 1/8 Inch Shaft* Fixed Rod* (2) Torque Rod Bushing* Sold Individually * Warranty On Torque Rods Against...
    03-05100018
    SKU:
    03-05100018
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Freightliner
    Product Type:
    Frame & Chassis
    $259.99
    Qty in Cart: 0
    Price:
    $259.99
    Subtotal:
  • Black Faux Leather Armrest Cover Set, 33 Inch For Freightliner Cascadia

    Black Faux Leather Armrest Cover Set, 33 Inch For Freightliner Cascadia

    V-TRUCK CORP

    $45.77
    33 Inch Black Faux Leather Armrest Cover Set* High Quality Armrest Cover Set* Faux Leather* Black* 33 Inch* (2) Covers - Driver And Passenger Side * Sold As Pair* Warranty On Armrest Cover Sets...
    03-19200018
    SKU:
    03-19200018
    Material Options:
    Synthetic Leather
    Length Options:
    33 Inch
    Color:
    Black
    Truck Class:
    Heavy Duty
    Make:
    Freightliner
    Product Type:
    Seats
    $45.77
    Qty in Cart: 0
    Price:
    $45.77
    Subtotal:
  • Tie Rod End 5.906 Inch W/ 1-1/4 in Inch OD -12 Ends, Straight Bend, Passenger Side - 99018820 For Watson & Chalin

    Tie Rod End 5.906 Inch W/ 1-1/4 in Inch OD -12 Ends, Straight Bend, Passenger Side - 99018820 For Watson & Chalin

    AFTERMARKET

    $78.99
    5.906 Inch Center To End Tie Rod End Replaces 99018820* High Quality Tie Rod End* 11/14 Inch Rod OD* 5.906 Inch Center To End* 2.631 Inch Height Of Taper* 1.08 Inch Taper Minor Diameter* 1.25 Inch...
    19-05180181
    SKU:
    19-05180181
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Position:
    Passenger Side
    Make:
    Trailer
    Product Type:
    Trailer
    $78.99
    Qty in Cart: 0
    Price:
    $78.99
    Subtotal:
  • Stainless Steel Cab Panels W/ 16 Amber/Clear Crew LEDs For International ProStar W/ Heater Plug 2008-2018

    Stainless Steel Cab Panels W/ 16 Amber/Clear Crew LEDs For International ProStar W/ Heater Plug 2008-2018

    ROADWORKS

    $738.99
    Stainless Steel Cab Panels W/ 16 Amber/Clear Crew LEDs Fits International ProStar* High Quality Cab Panels* Made Of Stainless Steel * For Trucks With Heater Plug * With 8 Amber/Clear Crew Lights *...
    07-091200187
    SKU:
    07-091200187
    Location:
    Made In USA
    Light Options:
    With Lights
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    International
    Finish Options:
    Polished
    Length Options:
    52 Inch
    Product Type:
    Exterior
    $738.99
    Qty in Cart: 0
    Price:
    $738.99
    Subtotal:
  • Tie Rod End 5.906 In,1-1/4 in Inch OD -12 Ends, Straight Bend, Driver Side Replaces 99018810 For Watson & Chalin

    Tie Rod End 5.906 In,1-1/4 in Inch OD -12 Ends, Straight Bend, Driver Side Replaces 99018810 For Watson & Chalin

    AFTERMARKET

    $78.99
    5.906 Inch Center To End Tie Rod End Replaces 99018810Maintain dependable steering and vehicle control with the Tie Rod End 5.906 In, 1-1/4 Inch OD -12 Ends, Straight Bend, Driver Side, replacing...
    19-05180182
    SKU:
    19-05180182
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Position:
    Driver Side
    Make:
    Trailer
    Product Type:
    Trailer
    $78.99
    Qty in Cart: 0
    Price:
    $78.99
    Subtotal:
  • Stainless Steel Cab Panels W/ 16 Amber Super Nova LEDs For International ProStar W/ Heater Plug 2008-2018

    Stainless Steel Cab Panels W/ 16 Amber Super Nova LEDs For International ProStar W/ Heater Plug 2008-2018

    ROADWORKS

    $704.99
    Stainless Steel Cab Panels W/ 16 Amber Super Nova LEDs Fits International ProStar* High Quality Cab Panels* Made Of Stainless Steel* For Trucks With Heater Plug * With 8 Amber Super Nova Lights* Sold...
    07-091200185
    SKU:
    07-091200185
    Location:
    Made In USA
    Light Options:
    With Lights
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    International
    Finish Options:
    Polished
    Length Options:
    52 Inch
    Product Type:
    Exterior
    $704.99
    Qty in Cart: 0
    Price:
    $704.99
    Subtotal:
  • Stainless Steel Cab Panels W/ 24 Amber 2 Inch Flat LEDs For International ProStar W/ Heater Plug 2008-2018

    Stainless Steel Cab Panels W/ 24 Amber 2 Inch Flat LEDs For International ProStar W/ Heater Plug 2008-2018

    ROADWORKS

    $659.99
    Stainless Steel Cab Panels W/ 24 Amber 2 Inch Flat LEDs Fits International ProStar* High Quality Cab Panels* Made Of Stainless Steel * For Trucks With Heater Plug * With 12- 2 Inch Amber Round Flat...
    07-091200188
    SKU:
    07-091200188
    Location:
    Made In USA
    Light Options:
    With Lights
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    International
    Finish Options:
    Polished
    Length Options:
    52 Inch
    Product Type:
    Exterior
    $659.99
    Qty in Cart: 0
    Price:
    $659.99
    Subtotal:
  • Stainless Steel Cab Panels W/ 16 Amber Crew LEDs For International ProStar W/ Heater Plug 2008-2018

    Stainless Steel Cab Panels W/ 16 Amber Crew LEDs For International ProStar W/ Heater Plug 2008-2018

    ROADWORKS

    $654.99
    Stainless Steel Cab Panels W/ 16 Amber Crew LEDs Fits International ProStar* High Quality Cab Panels* Made Of Stainless Steel * For Trucks With Heater Plug* With 8 Amber Crew Lights * Sold...
    07-091200186
    SKU:
    07-091200186
    Location:
    Made In USA
    Light Options:
    With Lights
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    International
    Finish Options:
    Polished
    Length Options:
    52 Inch
    Product Type:
    Exterior
    $654.99
    Qty in Cart: 0
    Price:
    $654.99
    Subtotal:
  • Stainless Steel Cab Panels W/ 24 Amber/Clear 2 Inch Flat LEDs For International ProStar W/ Heater Plug 2008-2018

    Stainless Steel Cab Panels W/ 24 Amber/Clear 2 Inch Flat LEDs For International ProStar W/ Heater Plug 2008-2018

    ROADWORKS

    $659.99
    Stainless Steel Cab Panels W/ 24 Amber/Clear 2 Inch Flat LEDs Fits International ProStar* High Quality Cab Panels* Made Of Stainless Steel* For Trucks With Heater Plug * With 12- 2 Inch Amber/Clear...
    07-091200189
    SKU:
    07-091200189
    Location:
    Made In USA
    Light Options:
    With Lights
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    International
    Finish Options:
    Polished
    Length Options:
    52 Inch
    Product Type:
    Exterior
    $659.99
    Qty in Cart: 0
    Price:
    $659.99
    Subtotal:
  • Drag Link 18.110 Inch C To C Replaces 1416146000 For Freightliner

    Drag Link 18.110 Inch C To C Replaces 1416146000 For Freightliner

    AFTERMARKET

    $164.99
    18.11 Inch C To C Drag Link Replaces 1416146000, 1417323000Reliable and heavy-duty, this 18.11-inch drag link for Freightliner replaces OEM 1416146000 and 1417323000 with exact fit. With...
    03-05090018
    SKU:
    03-05090018
    Truck Class:
    Heavy Duty
    Length Options:
    14 1/2 Inch
    Material Options:
    Steel
    Make:
    Freightliner
    Product Type:
    Frame & Chassis
    $164.99
    Qty in Cart: 0
    Price:
    $164.99
    Subtotal:
  • Drag Link 27 Inch C To C - F81A3304DA For Ford F650, F750, F800

    Drag Link 27 Inch C To C - F81A3304DA For Ford F650, F750, F800

    AFTERMARKET

    $313.99
    27 Inch C To C Drag Link Replaces F81A3304DA, F81Z3304DE* High Quality Drag Link* 27.00 Inch C To C Length* 14.50 Inch E To E Length* 1.625 Inch Shaft Diameter* Shaft Side Thread- 1-1/8 Inch-12...
    05-05090018
    SKU:
    05-05090018
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Ford
    Product Type:
    Frame & Chassis
    $313.99
    Qty in Cart: 0
    Price:
    $313.99
    Subtotal:
  • BESTfit 5 X 18 Inch DPF Flex Connector Replaces A04-27334-018 For Freightliner, Western Star

    BESTfit 5 X 18 Inch DPF Flex Connector Replaces A04-27334-018 For Freightliner, Western Star

    BESTFIT TRUCK PARTS

    $1,064.99
    BESTfit 5 X 18 Inch Exhaust Flexible Connector fits Freightliner & Western StarProtect your DPF system with the BESTfit 5 x 18 Inch Flex Connector for Freightliner and Western Star trucks. It...
    29-080416
    SKU:
    29-080416
    Truck Class:
    Heavy Duty
    Diameter Options:
    5 Inch
    Length Options:
    18 Inch
    Material Options:
    Steel
    Make:
    Western Star
    Make:
    Freightliner
    Finish Options:
    Chrome-Plated
    Product Type:
    Exhaust
    $1,064.99
    Qty in Cart: 0
    Price:
    $1,064.99
    Subtotal:
  • FREE SHIPPING
    BESTfit A/C Evaporator W/ Plate Fin Design For Mack CHU & Granite

    BESTfit A/C Evaporator W/ Plate Fin Design For Mack CHU & Granite

    BESTFIT TRUCK PARTS

    $355.99
    A/C Evaporator W/ Plate Fin Design By BESTfit Fits Mack CHU & GraniteRestore reliable cooling performance in your Mack CHU and Granite trucks with the BESTfit A/C Evaporator featuring a Plate Fin...
    11-070000018
    SKU:
    11-070000018
    Product Type:
    Engine Parts
    Height Options:
    7 Inch
    Width Options:
    2 1/2 Inch
    Length Options:
    10 1/4 Inch
    Make:
    Mack
    $355.99
    Qty in Cart: 0
    Price:
    $355.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Hood Latch Catch Hook W/ 1.25 Inch C To C Bolt Holes For Freightliner FL70-80 & M2 Replaces 17-14781-000

    Hood Latch Catch Hook W/ 1.25 Inch C To C Bolt Holes For Freightliner FL70-80 & M2 Replaces 17-14781-000

    AUTOMANN USA

    $9.51
    Hood Latch Catch Hook W/ 1.25 Inch C To C Bolt Holes Replaces 17-14781-000 Fits Freightliner FL70-80 & M2Avoid hood misalignment and enhance safety with the Hood Latch Catch Hook, specifically...
    03-124018
    SKU:
    03-124018
    Truck Class:
    Heavy Duty
    Make:
    Freightliner
    Color:
    Black
    Material Options:
    Plastic/Poly
    Product Type:
    Hood Parts & Acc.
    Ready To Ship:
    Yes
    $9.51
    Qty in Cart: 0
    Price:
    $9.51
    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:
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