null

Price Range

    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

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • FREE SHIPPING OVER $249
    BESTfit 5 Inch Turbo Pipe Extension Elbow Replaces 14-13409 For Peterbilt 357, 378, 379

    BESTfit 5 Inch Turbo Pipe Extension Elbow Replaces 14-13409 For Peterbilt 357, 378, 379

    BESTFIT TRUCK PARTS

    $69.99
    BESTfit Turbo Extension Pipe Fits PeterbiltFor trucks equipped with high-mount exhaust systems, the BESTfit 5 Inch Turbo Pipe Extension Elbow ensures your Peterbilt 357, 378, or 379 maintains optimal...
    01-08013409
    SKU:
    01-08013409
    Truck Class:
    Heavy Duty
    Diameter Options:
    5 Inch
    Material Options:
    Aluminized Steel
    Degree Options:
    20
    Make:
    Peterbilt
    Product Type:
    Exhaust
    Ready To Ship:
    Yes
    $69.99
    Qty in Cart: 0
    Price:
    $69.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 5 Inch ID/OD 90 Degree Elbow Pipe Replaces 14-13433 For Peterbilt 379

    BESTfit 5 Inch ID/OD 90 Degree Elbow Pipe Replaces 14-13433 For Peterbilt 379

    BESTFIT TRUCK PARTS

    $97.99
    BESTfit Lower Elbow Below Turbo Frame PipeFor Peterbilt 379 owners, the BESTfit 5 Inch ID/O.D. 90 Degree Elbow Pipe offers a replacement for OE number 14-13433. Sold individually, this elbow pipe is...
    01-08134330
    SKU:
    01-08134330
    Diameter Options:
    5 Inch
    Truck Class:
    Heavy Duty
    Style Options:
    Elbow
    Material Options:
    Steel
    Degree Options:
    90
    Make:
    Peterbilt
    Length Options:
    12 Inch
    Finish Options:
    Galvanized
    Product Type:
    Exhaust
    Ready To Ship:
    Yes
    $97.99
    Qty in Cart: 0
    Price:
    $97.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Alumzd Steel Replacement Pipe W/ 58 Degree Bend For Peterbilt 377, 378 & 379 Replaces 14-13430

    BESTfit Alumzd Steel Replacement Pipe W/ 58 Degree Bend For Peterbilt 377, 378 & 379 Replaces 14-13430

    BESTFIT TRUCK PARTS

    $134.99
    Alumzd Steel Replacement Pipe W/ 5 Inch OD By BESTfit Replaces 14-13430 Fits Peterbilt 377, 378 & 379The BESTfit 5 Inch OD 58 Degree Turbo Elbow is designed to provide Peterbilt 377, 378, and 379...
    01-08134300
    SKU:
    01-08134300
    Diameter Options:
    5 Inch
    Truck Class:
    Heavy Duty
    Degree Options:
    58
    Make:
    Peterbilt
    Product Type:
    Exhaust
    Ready To Ship:
    Yes
    Location:
    Made In USA
    Material Options:
    Aluminized Steel
    $134.99
    Qty in Cart: 0
    Price:
    $134.99
    Subtotal:
  • Load Spring Replaces E9410, E-11496, 49377, 49377000, 49377-000, 60879, 60879000, 60879-000, 60879000L, 60879-000L, 400060879000L, 4000-60879000L, 1138983, 8HS640, 1348, 21921 For Hendrickson Suspension

    Load Spring Replaces E9410, E-11496, 49377, 49377000, 49377-000, 60879, 60879000, 60879-000, 60879000L, 60879-000L, 400060879000L, 4000-60879000L, 1138983, 8HS640, 1348, 21921 For Hendrickson Suspension

    AFTERMARKET

    $213.99
    5.625/ 6.875 X 5.25 Inch Load Spring W/ 0.438 Inch Bolt HoleEnsure your Hendrickson suspension operates at peak performance with this premium Load Spring. Top plate length 5.625 inches, bottom plate...
    29-05100134
    SKU:
    29-05100134
    Width Options:
    6 5/8 Inch
    Product Type:
    Frame & Chassis
    Length Options:
    5 5/8 Inch
    Height Options:
    5 Inch
    Make:
    Universal Items
    $213.99
    Qty in Cart: 0
    Price:
    $213.99
    Subtotal:
  • BESTfit 5 Inch Plain Economy Exhaust Elbow BOM Passenger Side W/ Hi Mount Exhaust For Peterbilt 357, 378 & 379

    BESTfit 5 Inch Plain Economy Exhaust Elbow BOM Passenger Side W/ Hi Mount Exhaust For Peterbilt 357, 378 & 379

    BESTFIT TRUCK PARTS

    $400.99
    5 Inch Plain Economy Exhaust Elbow BOM Passenger Side W/ Hi Mount Exhaust By BESTfit Fits Peterbilt 357, 378 & 379For a cost-effective solution that doesn't sacrifice performance, choose the BESTfit...
    01-08134121
    SKU:
    01-08134121
    Diameter Options:
    5 Inch
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Exhaust
    Ready To Ship:
    Yes
    Material Options:
    Aluminized Steel
    Style Options:
    Elbow Multi-Bend
    $400.99
    Qty in Cart: 0
    Price:
    $400.99
    Subtotal:
  • 85MM Front Shackle Side Bar For Peterbilt, Kenworth

    85MM Front Shackle Side Bar For Peterbilt, Kenworth

    AUTOMANN USA

    $17.34
    85MM Leaf Spring Shackle Side Bar Replaces B20-6017Reinforce your Peterbilt or Kenworth suspension with the 85MM Front Shackle Side Bar. Engineered for front medium-duty axles with bushings, this...
    29-05090134
    SKU:
    29-05090134
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Peterbilt
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $17.34
    Qty in Cart: 0
    Price:
    $17.34
    Subtotal:
  • BESTfit 5 Inch Plain Exhaust Elbow Replaces 14-15503 For Peterbilt 357 & 378 Passenger Side

    BESTfit 5 Inch Plain Exhaust Elbow Replaces 14-15503 For Peterbilt 357 & 378 Passenger Side

    BESTFIT TRUCK PARTS

    $781.99
    BESTfit Exhaust Elbow Below Muffler Fits PeterbiltThis high quality 5 inch plain exhaust elbow fits Peterbilt passenger side. The elbow comes with a 1 year warranty.* High Quality Exhaust Elbow* 4...
    01-08134120
    SKU:
    01-08134120
    Diameter Options:
    5 Inch
    Truck Class:
    Heavy Duty
    Style Options:
    Elbow Multi-Bend
    Material Options:
    Steel
    Make:
    Peterbilt
    Product Type:
    Exhaust
    Ready To Ship:
    Yes
    $781.99
    Qty in Cart: 0
    Price:
    $781.99
    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:
  • 20 Inch SBA Bumper W/ Mounting & Vent Holes For Kenworth T400 SBA

    20 Inch SBA Bumper W/ Mounting & Vent Holes For Kenworth T400 SBA

    VALLEY CHROME PLATING

    $1,641.99
    Valley Chrome 20 Inch SBA Bumper With Mounting & Vent Holes* High Quality Replacement Bumper* 20 Inch SBA* Has Cutouts For: - Mounting - Vent Holes* Does Not Include Lights, Mounting Bolts, Washers...
    FM000134
    SKU:
    FM000134
    Truck Class:
    Heavy Duty
    Light Options:
    Without Lights
    Height Options:
    20 Inch
    Make:
    Kenworth
    Style Options:
    Set Back Axle
    Material Options:
    Steel
    Finish Options:
    Chrome-Plated
    Type Options:
    Standard Mount
    Product Type:
    Bumpers
    $1,641.99
    Qty in Cart: 0
    Price:
    $1,641.99
    Subtotal:
  • FREE SHIPPING OVER $249
    17 Inch 24 Diode Slim Flatline Amber LED Light W/ Clear Lens & Chrome Bezel

    17 Inch 24 Diode Slim Flatline Amber LED Light W/ Clear Lens & Chrome Bezel

    TRUX ACCESSORIES

    $36.59
    Amber LED Slim Flatline Light W/ Clear Lens & Chrome Bezel4 State Trucks offers this quality 17-inch LED marker light with a sleek and shiny chrome bezel. Made to withstand outside elements, it has...
    09-1601011134
    SKU:
    09-1601011134
    Color:
    Amber
    Truck Class:
    Universal
    Length Options:
    17 Inch
    Style Options:
    Flatline
    Shape Options:
    Oval
    Make:
    Universal Items
    Product Type:
    Lighting
    Ready To Ship:
    Yes
    $36.59
    Qty in Cart: 0
    Price:
    $36.59
    Subtotal:
  • 20 Inch SS SBA Bumper With Vent Holes For Kenworth T400

    20 Inch SS SBA Bumper With Vent Holes For Kenworth T400

    VALLEY CHROME PLATING

    $1,300.99
    Valley Chrome SBA Bumper With Vent Holes* High Quality Bumper* Stainless Steel* 20 Inch* Has Vent Holes* Set Back Axle* Made In USA* Sold Individually* Warranty On Bumpers Against Defects In...
    FM000134S
    SKU:
    FM000134S
    Product Type:
    Bumpers
    Height Options:
    20 Inch
    Truck Class:
    Heavy Duty
    Style Options:
    Set Back Axle
    Material Options:
    Stainless Steel
    Make:
    Kenworth
    $1,300.99
    Qty in Cart: 0
    Price:
    $1,300.99
    Subtotal:
  • 20 Inch 17 Diode Spyder Front, Park, Turn Light Bar - Amber LED/ Clear Lens

    20 Inch 17 Diode Spyder Front, Park, Turn Light Bar - Amber LED/ Clear Lens

    GRAND GENERAL

    $48.07
    Amber LED Front Park Turn Spyder Light Bar With Sealed Clear LensThe 20-inch Spyder LED light bar comes with amber-clear front park and turn light functions. It features a sealed polycarbonate lens,...
    09-160101340
    SKU:
    09-160101340
    Truck Class:
    Heavy Duty
    Length Options:
    20 Inch
    Material Options:
    Plastic/Poly
    Color:
    Amber/Clear
    Make:
    Universal Items
    Product Type:
    Lighting
    $48.07
    Qty in Cart: 0
    Price:
    $48.07
    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:
  • 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:
  • Roadworks 15.5 X 17.5 Inch Untie Drop Visor W/ 5 H1 Amber LED Lights For Kenworth T680 & T880

    Roadworks 15.5 X 17.5 Inch Untie Drop Visor W/ 5 H1 Amber LED Lights For Kenworth T680 & T880

    ROADWORKS

    $1,067.99
    15.5 X 17.5 Inch Untie Drop Visor W/ 5 H1 Amber LED Lights By Roadworks Fits Kenworth T680 & T880* High Quality Untie Drop Visor* 17.5 To 15.5 Inch Inner * (5) H1 Hero LED Lights* Amber/Amber* Blind...
    02-0901340
    SKU:
    02-0901340
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Light Options:
    With Lights
    Material Options:
    Stainless Steel
    Make:
    Kenworth
    Finish Options:
    Polished
    Type Options:
    Blind Mount
    Product Type:
    Exterior
    Style Options:
    Drop
    $1,067.99
    Qty in Cart: 0
    Price:
    $1,067.99
    Subtotal:
  • 10 Inch Stainless Steel Bowtie Drop Visor W/ Standard Mount For Kenworth Curved Windshield

    10 Inch Stainless Steel Bowtie Drop Visor W/ Standard Mount For Kenworth Curved Windshield

    ROADWORKS

    $453.99
    RoadWorks Standard Mount SS Bowtie Drop Visor* High Quality Visor* Standard Mount* Bowtie Visor* For Curved Windshield* 1 Piece With Cast Mirror Brackets* Sold Individually* Warranty On Visors...
    02-0901342
    SKU:
    02-0901342
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Make:
    Kenworth
    Light Options:
    Without Lights
    Product Type:
    Exterior
    Cab Style:
    Curved Windshield
    $453.99
    Qty in Cart: 0
    Price:
    $453.99
    Subtotal:
  • 12 Gauge Customs 10X7 Inch Stainless Steel Bowtie Visor For Kenworth T600, T800, W900B, W900 L W/ Flat Glass

    12 Gauge Customs 10X7 Inch Stainless Steel Bowtie Visor For Kenworth T600, T800, W900B, W900 L W/ Flat Glass

    TWELVE GAUGE

    $509.99
    10X7 Inch Stainless Steel Bowtie Visor By 12 Gauge Customs Fits Kenworth T600, T800, W900B, W900 L W/ Flat Glass* High Quality Bowtie Visor* Made Of Polished Stainless Steel * 2 Piece * Side Mount *...
    02-0901343
    SKU:
    02-0901343
    Truck Class:
    Heavy Duty
    Height Options:
    10 Inch
    Make:
    Kenworth
    Style Options:
    Bow Tie
    Material Options:
    Stainless Steel
    Finish Options:
    Polished
    Light Options:
    Without Lights
    Type Options:
    Standard Mount
    Product Type:
    Exterior
    Ready To Ship:
    Yes
    $509.99
    Qty in Cart: 0
    Price:
    $509.99
    Subtotal:
  • Twelve Gauge 9 Inch Stainless Steel Drop Visor For Kenworth T600 Aerocab, T660, T800, W900B And W900L Aerocab Models

    Twelve Gauge 9 Inch Stainless Steel Drop Visor For Kenworth T600 Aerocab, T660, T800, W900B And W900L Aerocab Models

    TWELVE GAUGE

    $448.99
    9 Inch Stainless Steel Drop Visor By Twelve Gauge Fits Kenworth T600 Aerocab, T660, T800, W900B And W900L Aerocab ModelsAdd a sleek touch to your Kenworth truck with this stainless steel reverse...
    02-0901345
    SKU:
    02-0901345
    Truck Class:
    Heavy Duty
    Height Options:
    13 Inch
    Make:
    Kenworth
    Material Options:
    Stainless Steel
    Light Options:
    Without Lights
    Type Options:
    Blind Mount
    Product Type:
    Exterior
    Style Options:
    Reverse Bowtie
    Ready To Ship:
    Yes
    $448.99
    Qty in Cart: 0
    Price:
    $448.99
    Subtotal:
  • Total: items /

Adding your products to cart


Introducing the Official 4 State Trucks Mobile App – Gear Up On the Go!