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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

    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

    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

    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

    Adapt to the Diesel Fuel Crisis Using These 10 Truck Mods(Post)

    Small aftermarket semi truck accessories and performance upgrades save more money over time than their upfront price suggests. Here are 10 aftermarket truck upgrades to create cost-per-mile savings. T

    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

    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

    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 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

    T880 Visor Ultimate Buyer's Guide(Post)

    There are countless Kenworth T880 visor options to choose from depending on the theme and style you’re going for. Here's a quick buyer's guide for Kenworth T880 aftermarket visors. Before you buy, con

    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

    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

    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

    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

    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

    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

    How to Choose the Right W990 Drop Visor(Post)

    The best Kenworth W990 drop visor depends on your design preference, mounting configuration, and windshield type or cab style (curved or flat). Buying a Custom W990 Truck Visor Online?  If you're brow

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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
    Subtotal:
  • 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:
  • 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
    Subtotal:
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    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:
  • Stainless Steel Light Bracket W/ 10 P1 Light Holes

    Stainless Steel Light Bracket W/ 10 P1 Light Holes

    PHOENIX DESIGN

    $149.99
    Stainless Steel Light Bracket W/ 10 P1 Light Holes* High Quality Light Bracket* Made Of 304 Stainless Steel* 10 P1 Light Holes * Lights Not Included* Sold Individually* Made In USA* Warranty On Light...
    09-160200066
    SKU:
    09-160200066
    Location:
    Made In USA
    Truck Class:
    Universal
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Lighting
    $149.99
    Qty in Cart: 0
    Price:
    $149.99
    Subtotal:
  • Stainless Steel Light Bracket W/ 10 P1 Amber/Amber LEDs

    Stainless Steel Light Bracket W/ 10 P1 Amber/Amber LEDs

    PHOENIX DESIGN

    $248.99
    Stainless Steel Light Bracket W/ 10 P1 Amber LED Amber Lens Lights* High Quality Light Bracket* Made Of 304 Stainless Steel* 10 P1 Lights* Amber LED/Amber Lens* Sold Individually* Made In USA*...
    09-160200064
    SKU:
    09-160200064
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Lighting
    $248.99
    Qty in Cart: 0
    Price:
    $248.99
    Subtotal:
  • Stainless Steel Light Bracket W/ 10 P1 Amber/Clear LEDs

    Stainless Steel Light Bracket W/ 10 P1 Amber/Clear LEDs

    PHOENIX DESIGN

    $253.99
    Stainless Steel Light Bracket W/ 10 P1 Amber LED Clear Lens Lights* High Quality Light Bracket* Made Of 304 Stainless Steel* 10 P1 Lights * Amber LED/Clear Lens* Sold Individually* Made In USA*...
    09-160200065
    SKU:
    09-160200065
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Light Options:
    With Lights
    Product Type:
    Lighting
    $253.99
    Qty in Cart: 0
    Price:
    $253.99
    Subtotal:
  • 12.5 Inch Drop Visor W/ 10 Amber M3 LEDs For International LT, LoneStar, ProStar W/ Hi Rise Pro Sleeper

    12.5 Inch Drop Visor W/ 10 Amber M3 LEDs For International LT, LoneStar, ProStar W/ Hi Rise Pro Sleeper

    ROADWORKS

    $1,007.99
    12.5 Inch Stainless Steel Drop Visor W/ 10 Amber M3 LEDs Fits International* High Quality Drop Visor* Made Of Stainless Steel * 12.5 Inch * With 10 Amber M3 LED Lights * Sold As Set * Warranty On...
    07-090000020
    SKU:
    07-090000020
    Height Options:
    12 Inch
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Light Options:
    With Lights
    Material Options:
    Stainless Steel
    Make:
    International
    Type Options:
    Standard Mount
    Product Type:
    Exterior
    Style Options:
    Drop
    $1,007.99
    Qty in Cart: 0
    Price:
    $1,007.99
    Subtotal:
  • VC Stainless Steel A/C Cover W/ Filter Door For Peterbilt 330, 357, 378, 375, 377 & 379

    VC Stainless Steel A/C Cover W/ Filter Door For Peterbilt 330, 357, 378, 375, 377 & 379

    VALLEY CHROME PLATING

    $168.99
    Stainless Steel A/C Cover W/ Filter Door By Valley Chrome Fits Peterbilt 330, 357, 378, 375, 377 & 379Restore your truck's appearance and protect vital A/C components with the VC Stainless Steel A/C...
    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
    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
    Subtotal:
  • 10 Inch Diameter Stack Muffler 5 ID / OD X 51.5 Inch OAL

    10 Inch Diameter Stack Muffler 5 ID / OD X 51.5 Inch OAL

    AFTERMARKET

    $155.99
    10 Inch Diameter Stack Muffler With 5 Inch Inlet And OutletOptimize your truck's exhaust system with the 10 Inch Diameter Stack Muffler, a high-quality, aluminized steel muffler built for longevity...
    29-08020001
    SKU:
    29-08020001
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Kenworth
    Make:
    Peterbilt
    Make:
    Mack
    Make:
    Volvo
    Product Type:
    Exhaust
    Ready To Ship:
    Yes
    $155.99
    Qty in Cart: 0
    Price:
    $155.99
    Subtotal:
  • Lincoln Chrome Steel 20 Inch Texas Boxed End Bumper, 10 Gauge W/ Mounting & Tow Holes For 1999 - 2003 Freightliner Classic 132XL, 120

    Lincoln Chrome Steel 20 Inch Texas Boxed End Bumper, 10 Gauge W/ Mounting & Tow Holes For 1999 - 2003 Freightliner Classic 132XL, 120

    LINCOLN CHROME

    $872.99
    Chrome Plated Steel 20 Inch Freightliner Classic Texas Boxed End Bumper* High Quality Replacement Bumper* Made Of 10-Gauge Chrome-Plated Steel* 20 Inch Texas Boxed End* Has Cutouts For  - Mounting...
    03-010020201
    SKU:
    03-010020201
    Height Options:
    20 Inch
    Make:
    Freightliner
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Style Options:
    Texas Boxed End
    Material Options:
    Steel
    Finish Options:
    Chrome-Plated
    Type Options:
    Standard Mount
    Size Options:
    10 Gauge
    Product Type:
    Bumpers
    $872.99
    Qty in Cart: 0
    Price:
    $872.99
    Subtotal:
  • BESTfit Chrome 20 Inch Raptor X8 Bumper, 10 Gauge W/ Squared Ends & Tow Holes For Kenworth W900B, W900L

    BESTfit Chrome 20 Inch Raptor X8 Bumper, 10 Gauge W/ Squared Ends & Tow Holes For Kenworth W900B, W900L

    BESTFIT TRUCK PARTS

    $954.99
    BESTfit Kenworth 10 Gauge Chrome-Plated Steel 20 Inch Raptor X8 Bumper W/ Squared Ends, Mounting & Tow Holes* High Quality Bumper* Made Of 10 Gauge Chrome Plated Steel* 20 Inches Height * Standard...
    02-010020039
    SKU:
    02-010020039
    Height Options:
    20 Inch
    Truck Class:
    Heavy Duty
    Style Options:
    Raptor X8
    Material Options:
    Steel
    Make:
    Kenworth
    Finish Options:
    Chrome-Plated
    Product Type:
    Bumpers
    Size Options:
    10 Gauge
    Type Options:
    Standard Mount
    Ready To Ship:
    Yes
    $954.99
    Qty in Cart: 0
    Price:
    $954.99
    Subtotal:
  • BESTfit Chrome 20 Inch Texas Bumper, 10 Gauge W/ Boxed Ends & Tow Holes For Kenworth W990 2019 - Current

    BESTfit Chrome 20 Inch Texas Bumper, 10 Gauge W/ Boxed Ends & Tow Holes For Kenworth W990 2019 - Current

    BESTFIT TRUCK PARTS

    $845.99
    BESTfit Kenworth 10 Gauge Chrome-Plated Steel 20 Inch Boxed End Texas Bumper W/ Mounting & Tow Holes* High Quality Bumper* Made Of 10 Gauge Chrome Plated Steel* 20 Inches Height * Standard Mount...
    02-010020036K
    SKU:
    02-010020036K
    Height Options:
    20 Inch
    Truck Class:
    Heavy Duty
    Style Options:
    Texas Boxed End
    Material Options:
    Steel
    Make:
    Kenworth
    Finish Options:
    Chrome-Plated
    Product Type:
    Bumpers
    Type Options:
    Standard Mount
    Size Options:
    10 Gauge
    Ready To Ship:
    Yes
    $845.99
    Qty in Cart: 0
    Price:
    $845.99
    Subtotal:
  • 10 Micron Fuel Water Separator Filter

    10 Micron Fuel Water Separator Filter

    OPP - ORIGINAL PARTS PROGRAM

    $42.04
    Donaldson 10 Micron Fuel Water Separator FilterRemove contaminates and water from your fuel system with this Donaldson fuel filter and water separator cartridge. It separates water in the fuel system...
    DNP550849
    SKU:
    DNP550849
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $42.04
    Qty in Cart: 0
    Price:
    $42.04
    Subtotal:
  • BESTfit Chrome 20 Inch Raptor X8 Bumper, 10 Gauge W/ Squared Ends & Tow Holes For Peterbilt

    BESTfit Chrome 20 Inch Raptor X8 Bumper, 10 Gauge W/ Squared Ends & Tow Holes For Peterbilt

    BESTFIT TRUCK PARTS

    $931.99
    BESTfit Peterbilt 10 Gauge Chrome-Plated Steel 20 Inch Raptor X8 Bumper W/ Squared Ends, Mounting & Tow HolesGive your Peterbilt a bold, durable front-end solution with the BESTfit 20 Inch Raptor X8...
    01-010020036
    SKU:
    01-010020036
    Finish Options:
    Chrome-Plated
    Material Options:
    Steel
    Product Type:
    Bumpers
    Truck Class:
    Heavy Duty
    Type Options:
    Standard Mount
    Height Options:
    20 Inch
    Light Options:
    Without Lights
    Size Options:
    10 Gauge
    Style Options:
    Raptor X8
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    $931.99
    Qty in Cart: 0
    Price:
    $931.99
    Subtotal:
  • BESTfit Copper Brass Radiator W/ Frame 40.5 X 30.625 X 2.25 Inch For Kenworth W900

    BESTfit Copper Brass Radiator W/ Frame 40.5 X 30.625 X 2.25 Inch For Kenworth W900

    BESTFIT TRUCK PARTS

    $2,871.99
    Radiator W/ 2.5 Inch Inlet & 2.5 Inch Outlet By BESTfit Replaces 1A0202650000* High Quality Radiator * Made Of Copper/Brass* With Frame* Core Size:  - 40.500 Inch Height  - 30.625 Inch Width  - 2.25...
    02-070200020
    SKU:
    02-070200020
    Truck Class:
    Heavy Duty
    Material Options:
    Brass Copper
    Make:
    Kenworth
    Product Type:
    Engine Parts
    $2,871.99
    Qty in Cart: 0
    Price:
    $2,871.99
    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
    Subtotal:
  • 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:
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