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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

    Semi-Truck Mattress Sizes: Fitment Chart & Buying Guide(Post)

    Looking for the right sized semi truck mattress? Every long-haul trucker should prioritize spending a sizeable portion of their budget on a quality mattress and driver's seat. That's where you spend

    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

    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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  • BESTfit Oil Pan Isolator Seal Gasket For Caterpillar C15 & Late 3406E Engines

    BESTfit Oil Pan Isolator Seal Gasket For Caterpillar C15 & Late 3406E Engines

    BESTFIT TRUCK PARTS

    $119.99
    BESTfit Diesel CAT C15 & Late 3406E Oil Pan GasketMade of HNBR rubber, this oil pan gasket seal has a one piece design and can withstand service temperatures of -40 to 115C. It is resistant to fuel,...
    09-071685248
    SKU:
    09-071685248
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $119.99
    Qty in Cart: 0
    Price:
    $119.99
    Subtotal:
  • 7 LED 194/168 Dome Type Bulb

    7 LED 194/168 Dome Type Bulb

    GRAND GENERAL

    $14.46
    Revamp your truck lighting with the 7 LED 194/168 Dome Type Bulb. This LED replacement bulb uses the 194/168 bulb number and a dome-style design, making it a direct replacement for compatible...
    PPR_205754
    SKU:
    PPR_205754
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Lighting
    Ready To Ship:
    Yes
    $14.46
    Qty in Cart: 0
    Price:
    $14.46
    Subtotal:
  • 10 LED 194/168 Tower Style Bulb

    10 LED 194/168 Tower Style Bulb

    GRAND GENERAL

    $15.19
    The 10 LED 194/168 Tower Style Bulb is an LED replacement for select truck lighting applications. Designed for 12-volt systems, this tower-style bulb uses 5630 SMD LEDs, with the white version...
    PPR_205757
    SKU:
    PPR_205757
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Lighting
    Ready To Ship:
    Yes
    $15.19
    Qty in Cart: 0
    Price:
    $15.19
    Subtotal:
  • 194/168 Tower Style 6 LED Light Bulb

    194/168 Tower Style 6 LED Light Bulb

    GRAND GENERAL

    $14.25 - $14.72
    Refresh truck lighting with the 194/168 Tower Style 6 LED Light Bulb. Made as an aftermarket replacement for 194/168 bulbs, this 12-volt tower-style bulb uses six 5630 SMD LEDs, with two positioned...
    PPR_205747
    SKU:
    PPR_205747
    Truck Class:
    Universal
    Make:
    Universal Items
    Material Options:
    Aluminum
    Product Type:
    Lighting
    Ready To Ship:
    Yes
    $14.25 - $14.72
    Qty in Cart: 0
    Price:
    $14.25 - $14.72
    Subtotal:
  • FREE SHIPPING OVER $249
    Chrome Bezel For 168 Series Lights

    Chrome Bezel For 168 Series Lights

    PETERSON MFG

    $2.74
    168 Series Bezel* High Quality Bezel* Chrome Plated* Fits M168 Series Lights* Bezel Only* Sold Individually* Made In USA* Warranty On Bezel Against Defects In Workmanship & Material From Date Of...
    09-1605073
    SKU:
    09-1605073
    Location:
    Made In USA
    Truck Class:
    Universal
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Product Type:
    Lighting
    $2.74
    Qty in Cart: 0
    Price:
    $2.74
    Subtotal:
  • FREE SHIPPING OVER $249
    2 Inch 2 Diode Red LED 168 Marker Light

    2 Inch 2 Diode Red LED 168 Marker Light

    PETERSON MFG

    $14.02
    Clearance/Marker Light* High Quality Light* LED 168* LED 2 Diodes* Red Light* Sold Individually* Made in the USA* Warranty on lights against defects in workmanship & material from date of purchase...
    09-160106081
    SKU:
    09-160106081
    Truck Class:
    Universal
    Make:
    Universal Items
    Location:
    Made In USA
    Color:
    Red
    Material Options:
    Plastic/Poly
    Product Type:
    Lighting
    Ready To Ship:
    Yes
    $14.02
    Qty in Cart: 0
    Price:
    $14.02
    Subtotal:
  • Oil Plug Replaces 168-2288, 1682288 For Caterpillar C7 Engines

    Oil Plug Replaces 168-2288, 1682288 For Caterpillar C7 Engines

    AUTOMANN USA

    $15.24
    0.953 Inch Oil Plug W/ 1.122 Inch A/F & M18 x 1.5 ThreadReplace worn or damaged plugs with this premium Oil Plug for Caterpillar C7 engines. With a 1.122-inch A/F, 0.953-inch length, and M18 x 1.5...
    29-07200009
    SKU:
    29-07200009
    Product Type:
    Engine Parts
    Style Options:
    Caterpillar
    Make:
    Universal Items
    $15.24
    Qty in Cart: 0
    Price:
    $15.24
    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:
  • 3 Inch Sleeper Panels W/ 4 P1 Amber/Clear LED Lights, 12 In Spacing For Peterbilt W/ 36/44 Inch Unibilt Sleepers No Extenders

    3 Inch Sleeper Panels W/ 4 P1 Amber/Clear LED Lights, 12 In Spacing For Peterbilt W/ 36/44 Inch Unibilt Sleepers No Extenders

    PHOENIX DESIGN

    $266.99
    Sleeper Panels W/ 4 P1 Amber LED Clear Lens LED Lights Fit Peterbilt W/ 36/44 Inch Unibilt Sleepers* High Quality Sleeper Panels * Made Of 304 Stainless Steel * 3 Inch* With 2 P1 Amber/Clear LED...
    01-10123168
    SKU:
    01-10123168
    Light Options:
    With Lights
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Finish Options:
    Polished
    Make:
    Peterbilt
    Length Options:
    44 Inch
    Product Type:
    Exterior
    $266.99
    Qty in Cart: 0
    Price:
    $266.99
    Subtotal:
  • Radiator Gasket 4.187 X 3.25 Inch C To C For Kenworth

    Radiator Gasket 4.187 X 3.25 Inch C To C For Kenworth

    AUTOMANN USA

    $11.55
    Kenworth Radiator Gasket Replaces K134168* High Quality Radiator Gasket* Dimensions: - 4.187 Inch C To C Length - 3.25 Inch C To C Width - 0.653 Inch Bolt Holes* Sold Individually * Warranty On...
    02-07020001
    SKU:
    02-07020001
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Product Type:
    Engine Parts
    $11.55
    Qty in Cart: 0
    Price:
    $11.55
    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:
  • Gloss Black Diamond Plate Aluminum Low Profile Deep Angled Crossover Tool Box- 63 Inch For Pickup Trucks

    Gloss Black Diamond Plate Aluminum Low Profile Deep Angled Crossover Tool Box- 63 Inch For Pickup Trucks

    AFTERMARKET

    $828.99
    63 Inch Gloss Black Diamond Plate Aluminum Low Profile Deep Angled Crossover Tool Box Fits Pickup TrucksBuilt to fit irregular truck beds, the Gloss Black Low Profile Deep Angled 63-Inch Crossover...
    09-020100168
    SKU:
    09-020100168
    Length Options:
    63 Inch
    Color:
    Black
    Truck Class:
    Universal
    Height Options:
    17 Inch
    Width Options:
    20 Inch
    Material Options:
    Aluminum
    Make:
    Universal Items
    Finish Options:
    Diamond Plate
    Product Type:
    Toolboxes
    $828.99
    Qty in Cart: 0
    Price:
    $828.99
    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
    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 OVER $249
    Black Rubber Caution Wide Turns Mud Flap 24 X 30 Inch

    Black Rubber Caution Wide Turns Mud Flap 24 X 30 Inch

    AFTERMARKET

    $73.99
    24 X 30 Inch Black Caution Wide Turns Mud FlapThis pair of black rubber mud flaps has bright yellow text to caution passing vehicles of wide turns. They mount behind your tires to prevent small...
    09-0507168
    SKU:
    09-0507168
    Height Options:
    30 Inch
    Truck Class:
    Universal
    Width Options:
    24 Inch
    Material Options:
    Rubber
    Make:
    Universal Items
    Color:
    Black
    Product Type:
    Mud Flaps
    $73.99
    Qty in Cart: 0
    Price:
    $73.99
    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:
  • 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:
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