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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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  • 5 Inch Aluminized Multi-Bend Turbo Pipe Replaces 04-17094-015 For Freightliner FLD112, FLD120

    5 Inch Aluminized Multi-Bend Turbo Pipe Replaces 04-17094-015 For Freightliner FLD112, FLD120

    BESTFIT TRUCK PARTS

    $216.99
    Multi-Bend 5 Inch Aluminized Turbo Pipe With Pyrometer Fitting Fits Freightliner FLD* High Quality Multi-Bend Turbo Pipe* Made Of Aluminized Steel* Multi-Bend Turbo Pipe For Freightliner* 5 Inch...
    03-08140150
    SKU:
    03-08140150
    Product Type:
    Exhaust
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Finish Options:
    Chrome-Plated
    Make:
    Freightliner
    $216.99
    Qty in Cart: 0
    Price:
    $216.99
    Subtotal:
  • On Sale
    FREE SHIPPING OVER $249
    Limited Quantity Available
    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
    Subtotal:
  • FREE SHIPPING
    BESTfit 5 Inch OD Chrome 90 Degree Exhaust Elbow For Freightliner Classic & FLD

    BESTfit 5 Inch OD Chrome 90 Degree Exhaust Elbow For Freightliner Classic & FLD

    BESTFIT TRUCK PARTS

    $336.99
    BESTfit Chrome-Plated Steel Exhaust Elbow W/ 5 Inch O.D. Inlet & Outlet* High Quality Exhaust Elbows* Made Of Chrome-Plated Steel* 5 Inch OD/OD* 24 Inch Overall Length (13x11)* 5.50 Inch Centerline...
    03-08106015
    SKU:
    03-08106015
    Truck Class:
    Heavy Duty
    Diameter Options:
    5 Inch
    Style Options:
    Elbow
    Material Options:
    Steel
    Degree Options:
    90
    Make:
    Freightliner
    Finish Options:
    Chrome-Plated
    Product Type:
    Exhaust
    Ready To Ship:
    Yes
    $336.99
    Qty in Cart: 0
    Price:
    $336.99
    Subtotal:
  • High Flow Performance Air Filter With Washable Element Media For International 9000 Series & Peterbilt 348

    High Flow Performance Air Filter With Washable Element Media For International 9000 Series & Peterbilt 348

    FLEET FILTERS

    $444.99
    High Performance Air Filter Media Fits International 9000 SeriesYou never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime, washable,...
    29-071300015
    SKU:
    29-071300015
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    $444.99
    Qty in Cart: 0
    Price:
    $444.99
    Subtotal:
  • Drag Link 23.25 Inch C To C Replaces 15123675, 15790152, And 15943453 For Chevrolet / GMC

    Drag Link 23.25 Inch C To C Replaces 15123675, 15790152, And 15943453 For Chevrolet / GMC

    AFTERMARKET

    $155.99
    23.25 Inch Long C To C Drag Fits Chevrolet / GMC* High Quality Drag Link* 23.25 Inch C To C* 14.50 Inch E To E* Shaft Diameter- 1.315 Inch* Shaft Side Thread- 1-1/8 Inch-12 Passenger Side* Taper Pin...
    12-05090015
    SKU:
    12-05090015
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Length Options:
    23 1/4 Inch
    Make:
    Chevrolet
    Make:
    GMC
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $155.99
    Qty in Cart: 0
    Price:
    $155.99
    Subtotal:
  • 1-Piece Stainless Steel Diesel Particulate Filter Replaces 2606777C1, 2817962C91 For Cummins ISM/ISL Engines

    1-Piece Stainless Steel Diesel Particulate Filter Replaces 2606777C1, 2817962C91 For Cummins ISM/ISL Engines

    GLOBAL EMISSIONS

    $1,920.99
    1-Piece Stainless Steel Diesel Particulate Filter Fits Cummins ISM & ISL Engines* High Quality Diesel Particulate Filter* Made Of Stainless Steel * Exclusive 1-Piece Canister Design For Durability*...
    29-080600015
    SKU:
    29-080600015
    Truck Class:
    Heavy Duty
    Style Options:
    Cummins
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Exhaust
    $1,920.99
    Qty in Cart: 0
    Price:
    $1,920.99
    Subtotal:
  • Engine Oil Filter Screw Cap For PACCAR MX13 Engine Replaces 1876740, 1876740, 1936324, 1936324, 1948922, 2011888

    Engine Oil Filter Screw Cap For PACCAR MX13 Engine Replaces 1876740, 1876740, 1936324, 1936324, 1948922, 2011888

    AUTOMANN USA

    $69.99
    PACCAR MX13 Engine Oil Filter Screw CapEnsure your PACCAR MX13 engine continues to operate efficiently with this replacement Engine Oil Filter Screw Cap. Its centrifugal screw-on design with included...
    29-072000015
    SKU:
    29-072000015
    Style Options:
    Paccar
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $69.99
    Qty in Cart: 0
    Price:
    $69.99
    Subtotal:
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    Jost 5th Wheel Air Cylinder Replaces SK7501503

    Jost 5th Wheel Air Cylinder Replaces SK7501503

    AUTOMANN USA

    $258.99
    Air Cylinder With 12 Inch Center To Center Mounting HolesThis air cylinder offers reliable performance for your rigs Jost 5th wheel slider. Featuring a 7.572-inch cylinder and .408-inch shaft, this...
    09-051100015
    SKU:
    09-051100015
    Length Options:
    12 Inch
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $258.99
    Qty in Cart: 0
    Price:
    $258.99
    Subtotal:
  • FREE SHIPPING
    BESTfit 8 To 5 Inch OD Chrome Exhaust Elbow Replaces 14Zflx-60158050Cp For Freightliner Classic & FLD

    BESTfit 8 To 5 Inch OD Chrome Exhaust Elbow Replaces 14Zflx-60158050Cp For Freightliner Classic & FLD

    BESTFIT TRUCK PARTS

    $501.99
    8 To 5 Inch OD Exhaust Elbow By BESTfit Fits FreightlinerRestore proper exhaust alignment on your Freightliner Classic or FLD with the BESTfit 8 to 5 Inch OD Chrome Exhaust Elbow. Crafted from...
    03-081856015
    SKU:
    03-081856015
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Degree Options:
    90
    Make:
    Freightliner
    Finish Options:
    Chrome-Plated
    Style Options:
    Elbow
    Product Type:
    Exhaust
    Diameter Options:
    8 To 5 Inch
    Ready To Ship:
    Yes
    $501.99
    Qty in Cart: 0
    Price:
    $501.99
    Subtotal:
  • BESTfit Camshaft Bushing 1.50 ID X 2.469 OD X 1.75 Inch Replaces M10WJ237X, E9792A, R617015

    BESTfit Camshaft Bushing 1.50 ID X 2.469 OD X 1.75 Inch Replaces M10WJ237X, E9792A, R617015

    BESTFIT TRUCK PARTS

    $8.35
    1.50 ID X 2.469 OD X 1.75 Inch Camshaft Bushing By BESTfitDepend on this BESTfit Camshaft Bushing to provide long-lasting, low-maintenance performance for your axles. Replacement for M10WJ237X,...
    09-05170150
    SKU:
    09-05170150
    Diameter Options:
    2 1/2 Inch
    Length Options:
    1 3/4 Inch
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $8.35
    Qty in Cart: 0
    Price:
    $8.35
    Subtotal:
  • On Sale
    Vortox 13 Inch Air Cleaner Assembly Driver Side For Freightliner Classic 120/ XL 132

    Vortox 13 Inch Air Cleaner Assembly Driver Side For Freightliner Classic 120/ XL 132

    PANELITE

    Now: $732.11
    Was: $959.99
    Freightliner Classic Vortox Air Cleaner Assembly Fits Freightliner Classic 120/ XL 132* High Quality Air Cleaner* Vortox Style* 13 Inch Diameter* Driver Side* Sold Individually* Warranty On Air...
    01015912
    SKU:
    01015912
    Make:
    Freightliner
    Height Options:
    13 Inch
    Position:
    Driver Side
    Product Type:
    Exterior
    Ready To Ship:
    Yes
    Now: $732.11
    Was: $959.99
    Qty in Cart: 0
    Price:
    Now: $732.11
    Was: $959.99
    Subtotal:
  • Radiator Support Rod 25.25 Inch Offset C To C For Peterbilt

    Radiator Support Rod 25.25 Inch Offset C To C For Peterbilt

    AFTERMARKET

    $132.99
    Replacement Radiator Support Rod W/ 2 OEM B70879 Ends & 17 MM ID X 33 MM SleeveStrengthen your truck's cooling system with the Radiator Support Rod, designed to provide sturdy support and reduce...
    01-070200015
    SKU:
    01-070200015
    Truck Class:
    Heavy Duty
    Product Type:
    Engine Parts
    Material Options:
    Steel
    Make:
    Peterbilt
    $132.99
    Qty in Cart: 0
    Price:
    $132.99
    Subtotal:
  • Drag Link 27.625 Inch C To C Replaces 4C403304DA For Ford F650, F750

    Drag Link 27.625 Inch C To C Replaces 4C403304DA For Ford F650, F750

    AFTERMARKET

    $288.99
    27.625 Inch C To C Drag Link Replaces 4C403304DA, 4C4O3304DA, 4C4Z3304DA, L20VU8141A11Ensure your Ford F650 or F750 maintains precise steering control with this premium Drag Link. Featuring 27.625...
    05-05090015
    SKU:
    05-05090015
    Material Options:
    Steel
    Length Options:
    14 1/2 Inch
    Truck Class:
    Heavy Duty
    Make:
    Ford
    Product Type:
    Frame & Chassis
    $288.99
    Qty in Cart: 0
    Price:
    $288.99
    Subtotal:
  • Drag Link 28.125 Inch C To C Replaces 14-17553-000 For Freightliner

    Drag Link 28.125 Inch C To C Replaces 14-17553-000 For Freightliner

    AFTERMARKET

    $174.99
    28.125 Inch C To C Drag Link Replaces 14-17553-000, 1417553000Maintain precise, dependable steering on your Freightliner with this 28.125-inch drag link. With 28.125 inches C-to-C and 7/8 inch-14...
    03-05090015
    SKU:
    03-05090015
    Length Options:
    28 Inch
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Freightliner
    Product Type:
    Frame & Chassis
    $174.99
    Qty in Cart: 0
    Price:
    $174.99
    Subtotal:
  • Steel Center Suspension Fame Bracket 21.25 Inch C To C For Kenworth W/ AG230 And AG460 Suspension

    Steel Center Suspension Fame Bracket 21.25 Inch C To C For Kenworth W/ AG230 And AG460 Suspension

    AFTERMARKET

    $1,676.99
    21.25 Inch C To C Center Suspension Frame Bracket* High Quality Frame Bracket* Steel* 21.25 Inch C To C* For Center Suspension* Made In USA* Sold Individually * Warranty On Frame Brackets Against...
    02-0510015
    SKU:
    02-0510015
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $1,676.99
    Qty in Cart: 0
    Price:
    $1,676.99
    Subtotal:
  • A/C Control & Vent Trim For Peterbilt 379

    A/C Control & Vent Trim For Peterbilt 379

    VALLEY CHROME PLATING

    $40.79
    Peterbilt 379 A/C Control & Vent Trim* High Quality Vent Trim* A/C Control* Sold Individually* Warranty On Vent Trims Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...
    01-15010015
    SKU:
    01-15010015
    Product Type:
    Interior
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    $40.79
    Qty in Cart: 0
    Price:
    $40.79
    Subtotal:
  • Actuator Dump Pump- Metering

    Actuator Dump Pump- Metering

    AFTERMARKET

    $289.99
    Actuator Dump Pump Replaces C-3805-DM, C3805DM* High Quality Actuator Dump Pump* Metering* Hardware Included* Sold Individually* Warranty On Actuator Dump Pumps Against Defects In Workmanship &...
    09-02500154
    SKU:
    09-02500154
    Product Type:
    Cargo Control
    Make:
    Universal Items
    $289.99
    Qty in Cart: 0
    Price:
    $289.99
    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:
  • Drag Link 31.69 Inch C To C Replaces 10-02132, 10-02260, 10-02499 For Peterbilt 579, 587

    Drag Link 31.69 Inch C To C Replaces 10-02132, 10-02260, 10-02499 For Peterbilt 579, 587

    AUTOMANN USA

    $188.99
    Peterbilt Drag Link - Replaces L24VU7051B11, L24VU8001C11, L24VU8001C11K & L24VU8001C11LOptimize your vehicle's handling with the Drag Link 31.69 Inch C To C, built for Peterbilt 579 and 587. This...
    01-050900015
    SKU:
    01-050900015
    Length Options:
    31 Inch
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $188.99
    Qty in Cart: 0
    Price:
    $188.99
    Subtotal:
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