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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

    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 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 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

    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

    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

    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

    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

    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. 

    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

    CB Radios Ultimate Guide(Post)

    “10-4 Roger.” Despite the rise of messaging apps, GPS devices with voice-activated messaging, and push-to-talk (PTT) apps, the classic CB radio remains among the most trusted and well-used accessorie

    What Should Be in a Semi Truck Emergency Kit? (Free PDF Checklist for Drivers)(Post)

    Semi-truck breakdowns cost money and time; but they aren't inevitable. With the right emergency accessories, truck drivers can minimize costly delays, tackle minor repairs on the fly, and safely power

    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

    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

    Top 10 Semi Truck Winter Accessories for Heavy-Duty Drivers(Post)

    Winter truck driving can be downright trecherous to haul payloads in, especially when you don't have the right winter-ready trucker gear to get you through difficult drives in below-freezing temperatu

    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

    Haul of Fame: The Murder Pete Truck(Post)

    They call it the Murder Pete. Blacked-out, rugged, and raw, it’s a notorious big rig known for its “murdered out” style. Supported by the custom fab shop work of Chrome Shop Mafia (CMS) and supplied w

    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

    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

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  • FREE SHIPPING OVER $249
    BESTfit 5 Inch Aluminized Multi-Bend Turbo Pipe Replaces 04-17094-020 For Freightliner FLD

    BESTfit 5 Inch Aluminized Multi-Bend Turbo Pipe Replaces 04-17094-020 For Freightliner FLD

    BESTFIT TRUCK PARTS

    $205.99
    BESTfit Multi-Bend 5 Inch Aluminized Turbo Pipe Without Pyrometer Fitting Fits Freightliner FLD* High Quality Turbo Exhaust Pipe* (2) 90 Degree Bends* Without Pyrometer Fitting* Made of Aluminized...
    03-08140200
    SKU:
    03-08140200
    Diameter Options:
    5 Inch
    Truck Class:
    Heavy Duty
    Style Options:
    Flanged
    Material Options:
    Aluminized Steel
    Make:
    Freightliner
    Product Type:
    Exhaust
    $205.99
    Qty in Cart: 0
    Price:
    $205.99
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  • 3 Layer Replacement Air Filter Wrap For 29-071300018 High Performance Air Filter

    3 Layer Replacement Air Filter Wrap For 29-071300018 High Performance Air Filter

    FLEET FILTERS

    $195.99
    3 Layer Replacement Air Filter Wrap For High Performance Air Filter* High Quality Replacement Air Filter Wrap* For 29-071300018* 3 Layer Design* Does Not Come Pre-Oiled* Oil Is Required Before...
    29-071300020
    SKU:
    29-071300020
    Truck Class:
    Heavy Duty
    Make:
    Volvo
    Product Type:
    Engine Parts
    $195.99
    Qty in Cart: 0
    Price:
    $195.99
    Subtotal:
  • On Sale
    Limited Quantity Available
    High Flow Performance Air Filter With Washable Element Media For Peterbilt - Pair

    High Flow Performance Air Filter With Washable Element Media For Peterbilt - Pair

    FLEET FILTERS

    Now: $325.13
    Was: $839.99
    High Performance Air Filter Media Fits Peterbilt - PairYou never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime, washable, high flow,...
    29-090500020
    SKU:
    29-090500020
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Exterior
    Now: $325.13
    Was: $839.99
    Qty in Cart: 0
    Price:
    Now: $325.13
    Was: $839.99
    Subtotal:
  • Stainless Steel Diesel Particulate Filter Replaces 23537225, A6804908692 For Detroit Diesel S60 Engine

    Stainless Steel Diesel Particulate Filter Replaces 23537225, A6804908692 For Detroit Diesel S60 Engine

    GLOBAL EMISSIONS

    $2,619.99
    Stainless Steel Diesel Particulate Filter Fits Detroit Diesel S60 Engine* High Quality Diesel Particulate Filter* Made Of Stainless Steel * OEM Quality Clamps And Gaskets Included* Sold Individually...
    29-080600020
    SKU:
    29-080600020
    Truck Class:
    Heavy Duty
    Style Options:
    Detroit
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Exhaust
    $2,619.99
    Qty in Cart: 0
    Price:
    $2,619.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Oil Filter Wrench For 3-1/2 Inch To 3-7/8 Inch Oil Filters

    Oil Filter Wrench For 3-1/2 Inch To 3-7/8 Inch Oil Filters

    AFTERMARKET

    $12.47
    Oil Filter WrenchEasily remove 3-1/2 inch to 3-7/8 inch spin on type of oil filters with this wrench. It is sold individually.* High Quality Wrench * For Oil Filter* 3-1/2 Inch to 3-7/8 Inch (89mm to...
    09-21000204
    SKU:
    09-21000204
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Tools
    $12.47
    Qty in Cart: 0
    Price:
    $12.47
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  • Steel 36 Gallon Bulkhead Hydraulic Reservoir W/ 10 Micron Filter - Powder Coated Black

    Steel 36 Gallon Bulkhead Hydraulic Reservoir W/ 10 Micron Filter - Powder Coated Black

    BUYERS PRODUCTS

    $1,825.99
    36 Gallon Hydraulic Reservoir With 10 Micron FilterThis durable 36-gallon Bulkhead Hydraulic Reservoir is built from 12-gauge steel with a rust-resistant black powder-coated finish. It features a...
    09-02500020
    SKU:
    09-02500020
    Color:
    Black
    Truck Class:
    Universal
    Height Options:
    26 Inch
    Width Options:
    42 Inch
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Cargo Control
    Length Options:
    8 1/2 Inch
    Capacity:
    36 Gallons
    Finish Options:
    Black Powder Coat
    Type Options:
    Side Mount
    Size Options:
    12 Gauge
    $1,825.99
    Qty in Cart: 0
    Price:
    $1,825.99
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  • 12-10 AWG Heat Shrink Flag .250 Male Quick Connect

    12-10 AWG Heat Shrink Flag .250 Male Quick Connect

    SPECTRO WIRE

    $1.01
    Heat Shrink Male Spade Terminal* High Quality Heat Shrink* 12-10 AWG * .250 Male Spade* Sold Individually* Warranty On Heat Shrinks Against Defects In Workmanship & Material From Date Of Purchase***...
    09-161302007
    SKU:
    09-161302007
    Product Type:
    Air, Electrical, & Safety
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    $1.01
    Qty in Cart: 0
    Price:
    $1.01
    Subtotal:
  • Filter Door Panel Cover For Peterbilt 375, 377, 378 & 379

    Filter Door Panel Cover For Peterbilt 375, 377, 378 & 379

    GRAND GENERAL

    $13.33
    Peterbilt Filter Door Panel CoverEnhance the interior detail of your Peterbilt 375, 377, 378, or 379 with this high-quality filter door panel cover designed for Peterbilt 370 Series 1995 & later...
    01-15020306
    SKU:
    01-15020306
    Material Options:
    Stainless Steel
    Product Type:
    Interior
    Height Options:
    4 1/2 Inch
    Width Options:
    6 Inch
    Make:
    Peterbilt
    $13.33
    Qty in Cart: 0
    Price:
    $13.33
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  • Stainless Steel DPF Cover For International LT 2018-Current

    Stainless Steel DPF Cover For International LT 2018-Current

    ROADWORKS

    $478.99
    International LT Diesel Particulate Filter Cover By RoadWorks* High Quality DPF Cover* Made Of 430 Grade Stainless Steel * Cover Only* Does Not Include Step Or Brackets* Sold Individually* Warranty...
    07-050200002
    SKU:
    07-050200002
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    International
    Product Type:
    Fuel Tanks
    $478.99
    Qty in Cart: 0
    Price:
    $478.99
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  • Stainless Steel A/C Cover With Filter Door For Peterbilt 1995-1999

    Stainless Steel A/C Cover With Filter Door For Peterbilt 1995-1999

    VALLEY CHROME PLATING

    $168.99
    A/C Cover With Filter Door* High Quality A/C Cover* A/C Replacement Cover For Peterbilt 370 Series 1995-1999* With Filter Door* Stainless Steel* Made In USA* Sold Individually* Warranty On A/C Covers...
    01-15020002
    SKU:
    01-15020002
    Material Options:
    Stainless Steel
    Product Type:
    Interior
    Location:
    Made In USA
    Make:
    Peterbilt
    $168.99
    Qty in Cart: 0
    Price:
    $168.99
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  • Stainless Steel Cab Panels W/ 12 Amber LED 2 Inch Round Flat Lights For International ProStar

    Stainless Steel Cab Panels W/ 12 Amber LED 2 Inch Round Flat Lights For International ProStar

    ROADWORKS

    $626.99
    Cab Panels W/ 12 Amber LED 2 Inch Round Flat Lights Fits International ProStar* High Quality Cab Panels* Made Of Stainless Steel* Without Heater Plug* 12 -2 Inch Round Flat Amber LED/Amber Lens...
    07-091200209
    SKU:
    07-091200209
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Light Options:
    With Lights
    Material Options:
    Stainless Steel
    Make:
    International
    Finish Options:
    Polished
    Length Options:
    52 Inch
    Product Type:
    Exterior
    $626.99
    Qty in Cart: 0
    Price:
    $626.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Aluminum HEXTHREAD ® Filter Cartridge Assembly Compatible With XTRACTOR ® XTR-8856 And XTRACTOR ® XTR-8058 For Trailer Axles

    Aluminum HEXTHREAD ® Filter Cartridge Assembly Compatible With XTRACTOR ® XTR-8856 And XTRACTOR ® XTR-8058 For Trailer Axles

    THE HUB CORPORATION

    $45.99
    HEXTHREAD Filter Cartridge For Trailer Axle ApplicationsThe HEXTHREAD Filter Cartridge is a high-quality replacement filtration component designed for trailer axle hub caps using the XTRACTOR...
    19-20200031
    SKU:
    19-20200031
    Product Type:
    Trailer
    Material Options:
    Aluminum
    Make:
    Trailer
    Ready To Ship:
    Yes
    $45.99
    Qty in Cart: 0
    Price:
    $45.99
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  • 12 Inch 430 Stainless Steel Blank Rear Center Panel With Stainless Steel Back Plate

    12 Inch 430 Stainless Steel Blank Rear Center Panel With Stainless Steel Back Plate

    ROADWORKS

    $226.99
    430 Stainless Steel Blank Rear Center Panel With Stainless Steel Back Plate* High Quality Rear Center Panel * Made Of 430 Stainless Steel * 12 Inch* Blank* With Stainless Steel Back Cover* Sold...
    09-011000202
    SKU:
    09-011000202
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Finish Options:
    Polished
    Product Type:
    Bumpers
    $226.99
    Qty in Cart: 0
    Price:
    $226.99
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  • 12 Inch 304 Stainless Steel Blank Rear Center Panel With Stainless Steel Back Plate

    12 Inch 304 Stainless Steel Blank Rear Center Panel With Stainless Steel Back Plate

    ROADWORKS

    $240.99
    304 Stainless Steel Blank Rear Center Panel With Stainless Steel Back Plate* High Quality Rear Center Panel * Made Of 304 Stainless Steel * 12 Inch* Blank* With Stainless Steel Back Cover* Sold...
    09-011000203
    SKU:
    09-011000203
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Finish Options:
    Polished
    Product Type:
    Bumpers
    $240.99
    Qty in Cart: 0
    Price:
    $240.99
    Subtotal:
  • 12 X 72 Inch Heavy Duty Oversize Load Sign

    12 X 72 Inch Heavy Duty Oversize Load Sign

    AFTERMARKET

    $52.99
    Heavy Duty 12 X 72 Inch Oversize Load SignMark oversized loads with this heavy-duty 12x72 inch mesh banner. It features 10-inch letters printed on one side for easy visibility. The banner is made...
    09-020200020
    SKU:
    09-020200020
    Color:
    Yellow
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Air, Electrical, & Safety
    $52.99
    Qty in Cart: 0
    Price:
    $52.99
    Subtotal:
  • 12 Inch Chrome Standard Tapered End Bumper, 7 Gauge W/ Bottom Step Hole For Mack R 1973-1989

    12 Inch Chrome Standard Tapered End Bumper, 7 Gauge W/ Bottom Step Hole For Mack R 1973-1989

    VALLEY CHROME PLATING

    $516.99
    Valley Chrome Tapered End Bumper W/ Bottom Step Hole Fits Mack R, RL, F, FL & FS ModelsIf you are in the market for a new or replacement bumper, look no further than this 7-gauge (3/16 inch thick)...
    GA020001
    SKU:
    GA020001
    Height Options:
    12 Inch
    Make:
    Mack
    Truck Class:
    Heavy Duty
    Light Options:
    Without Lights
    Style Options:
    Standard Rolled End
    Material Options:
    Steel
    Finish Options:
    Chrome-Plated
    Type Options:
    Standard Mount
    Size Options:
    7 Gauge
    Product Type:
    Bumpers
    $516.99
    Qty in Cart: 0
    Price:
    $516.99
    Subtotal:
  • Stainless Rear Air Cleaner Panels W/ 12 - 3/4 Inch Light Holes For Freightliner Classic XL 1991-2010

    Stainless Rear Air Cleaner Panels W/ 12 - 3/4 Inch Light Holes For Freightliner Classic XL 1991-2010

    PHOENIX DESIGN

    $113.99
    Rear Air Cleaner Panels W/ 12 - 3/4 Inch Light Holes Fit Freightliner Classic XL 1991-2010* High Quality Rear Air Cleaner Panel * Made Of 304 Stainless Steel * 6 - 3/4 Inch Round Light Holes Per...
    03-090500020
    SKU:
    03-090500020
    Truck Class:
    Heavy Duty
    Light Options:
    Without Lights
    Material Options:
    Stainless Steel
    Make:
    Freightliner
    Finish Options:
    Polished
    Position:
    Rear
    Product Type:
    Exterior
    $113.99
    Qty in Cart: 0
    Price:
    $113.99
    Subtotal:
  • 12 Inch Stainless Steel SBA Bumper With Tow Holes For Freightliner FL50, FL60, FL70, FL80

    12 Inch Stainless Steel SBA Bumper With Tow Holes For Freightliner FL50, FL60, FL70, FL80

    VALLEY CHROME PLATING

    $1,056.99
    Freightliner 12 Inch Stainless Steel SBA Bumper By Valley Chrome* High Quality Bumper* Stainless Steel* 12 Inch Height* Has Cutouts For:  - Tow Holes* Set Back Axle* Made In USA* Sold Individually *...
    CK002015S
    SKU:
    CK002015S
    Material Options:
    Stainless Steel
    Height Options:
    12 Inch
    Product Type:
    Bumpers
    Truck Class:
    Heavy Duty
    Style Options:
    Set Back Axle
    Make:
    Freightliner
    $1,056.99
    Qty in Cart: 0
    Price:
    $1,056.99
    Subtotal:
  • 12 X 72 Inch Oversize Load Mesh Banner W/ Grommet

    12 X 72 Inch Oversize Load Mesh Banner W/ Grommet

    AFTERMARKET

    $30.15
    Oversize Load Mesh Banner W/ Grommet- 12 X 72 InchStay safe and compliant on the road with the 12 x 72 Inch Oversize Load Mesh Banner. Made from heavy-duty polyester mesh, this bright yellow banner...
    09-02020228
    SKU:
    09-02020228
    Product Type:
    Cargo Control
    Material Options:
    Mesh
    Height Options:
    12 Inch
    Color:
    Yellow
    Width Options:
    72 Inch
    Make:
    Universal Items
    $30.15
    Qty in Cart: 0
    Price:
    $30.15
    Subtotal:
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