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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

    5 Truck Shows You Don't Want to Miss in 2027(Post)

    What are the best truck shows in America?  Over the years, we've visited them all at one point or another. Here's a full breakdown of what each U.S. truck show has to offer and how to choose the best

    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 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

    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. 

    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

    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

    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

    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

    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

    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

    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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  • RigMaster Lower Radiator Hose For T4-6 Models W/ Caterpillar Or Perkins Engine

    RigMaster Lower Radiator Hose For T4-6 Models W/ Caterpillar Or Perkins Engine

    RIGMASTER

    $21.44
    Lower Radiator Hose - RP5-027* High Quality Radiator Hose * Lower* May Need To Cut To Fit* Sold Individually * Warranty On Radiator Hoses Against Defects In Workmanship & Material From Date Of...
    RP5027
    SKU:
    RP5027
    Position:
    Lower
    Truck Class:
    Heavy Duty
    Material Options:
    Rubber
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $21.44
    Qty in Cart: 0
    Price:
    $21.44
    Subtotal:
  • High Flow Performance Air Filter With Washable Element Media For Mack

    High Flow Performance Air Filter With Washable Element Media For Mack

    FLEET FILTERS

    $444.99
    High Performance Air Filter Media Fits MackYou never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime, washable, high flow, air filters...
    29-071300027
    SKU:
    29-071300027
    Truck Class:
    Heavy Duty
    Make:
    Mack
    Product Type:
    Engine Parts
    $444.99
    Qty in Cart: 0
    Price:
    $444.99
    Subtotal:
  • 1-Piece Stainless Steel Diesel Particulate Filter Replaces 20864127 For Mack/Volvo D11, D13, D16 Engines

    1-Piece Stainless Steel Diesel Particulate Filter Replaces 20864127 For Mack/Volvo D11, D13, D16 Engines

    GLOBAL EMISSIONS

    $2,085.99
    1-Piece Stainless Steel Diesel Particulate Filter Fits Mack/Volvo D11, D13 & D16 Engines* High Quality Diesel Particulate Filter* Made Of Stainless Steel * Exclusive 1-Piece Canister Design For...
    29-080600027
    SKU:
    29-080600027
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Mack
    Make:
    Volvo
    Product Type:
    Exhaust
    $2,085.99
    Qty in Cart: 0
    Price:
    $2,085.99
    Subtotal:
  • High Flow Performance Air Filter With Washable Element Media For Kenworth T800 & Peterbilt 388 - Pair

    High Flow Performance Air Filter With Washable Element Media For Kenworth T800 & Peterbilt 388 - Pair

    FLEET FILTERS

    $839.99
    High Performance Air Filter Media Fits Kenworth T800, Peterbilt 388 - PairYou never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime,...
    29-090500027
    SKU:
    29-090500027
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Make:
    Kenworth
    Product Type:
    Exterior
    $839.99
    Qty in Cart: 0
    Price:
    $839.99
    Subtotal:
  • FREE SHIPPING OVER $249
    HFA5 Series In Tank Filter 50 GPM, 25 PSI Bypass W/ Filter Head & 10 Micron Filter Element

    HFA5 Series In Tank Filter 50 GPM, 25 PSI Bypass W/ Filter Head & 10 Micron Filter Element

    BUYERS PRODUCTS

    $153.99
    HFA5 Series In Tank Filter 100 PSI Working Pressure W/ 1.25 Inch NPTF ThreadMaintain clean fluid flow and protect critical components with the HFA5 Series 50 GPM In-Tank Filter. Designed for...
    09-02500271
    SKU:
    09-02500271
    Product Type:
    Cargo Control
    Rating:
    100 PSI
    Make:
    Universal Items
    $153.99
    Qty in Cart: 0
    Price:
    $153.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Cab Fresh Air Filter For Freightliner Classic & FLD

    Cab Fresh Air Filter For Freightliner Classic & FLD

    CAB FRESH FILTER CO.

    $16.87 - $44.55
    The Cab Fresh air filter is designed to help maintain cleaner air inside the cab by reducing dust, soot, and other airborne contaminants. Built as a replacement filter option that fits select...
    PPR_202785
    SKU:
    PPR_202785
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Material Options:
    Cloth
    Make:
    Freightliner
    Product Type:
    Interior
    Ready To Ship:
    Yes
    $16.87 - $44.55
    Qty in Cart: 0
    Price:
    $16.87 - $44.55
    Subtotal:
  • FREE SHIPPING OVER $249
    Mesh Air Cleaner Pre-Filters For 11, 13 & 15 Inch Options For 13 Inch Donaldson Or Vortox Air Breather

    Mesh Air Cleaner Pre-Filters For 11, 13 & 15 Inch Options For 13 Inch Donaldson Or Vortox Air Breather

    FREEDOM AIR FILTERS

    $45.89 - $65.99
    Keep your engine breathing cleaner with these pre-filter air cleaner covers designed for 11", 13", and 15" Donaldson or Vortox systems. Sold as a pair, these high-quality mesh pre-filters are built...
    PPR_202751
    SKU:
    PPR_202751
    Truck Class:
    Universal
    Color:
    Black
    Color:
    Orange
    Color:
    Green
    Color:
    Yellow
    Color:
    Purple
    Color:
    Blue
    Color:
    Red
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Exterior
    Style Options:
    Donaldson Style
    Diameter Options:
    15 Inch
    Height Options:
    13 Inch
    Height Options:
    15 Inch
    Height Options:
    11 Inch
    Ready To Ship:
    Yes
    Material Options:
    Mesh
    Location:
    Made In USA
    $45.89 - $65.99
    Qty in Cart: 0
    Price:
    $45.89 - $65.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Vent Plug W/ 40 Micron Filter, Steel, 3/4 Inch NPT Thread

    Vent Plug W/ 40 Micron Filter, Steel, 3/4 Inch NPT Thread

    BUYERS PRODUCTS

    $16.53
    Hydraulic Tank Steel Vent Plug W/ 40 Micron Filter, Steel, 3/4 Inch NPT ThreadImprove hydraulic system protection and reliability with this high-quality Vent Plug, designed for heavy-duty hydraulic...
    09-02500274
    SKU:
    09-02500274
    Product Type:
    Cargo Control
    Height Options:
    3 Inch
    Material Options:
    Steel
    Diameter Options:
    3 Inch
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $16.53
    Qty in Cart: 0
    Price:
    $16.53
    Subtotal:
  • BESTfit Plastic Aluminum Radiator W/O Oil Cooler 38.1875 X 25.125 X 2.25 Inch 3 Row Replaces 2586042C91, 2507374C91 For International 7300, 7400, 7500 WorkStar

    BESTfit Plastic Aluminum Radiator W/O Oil Cooler 38.1875 X 25.125 X 2.25 Inch 3 Row Replaces 2586042C91, 2507374C91 For International 7300, 7400, 7500 WorkStar

    BESTFIT TRUCK PARTS

    $1,046.99
    Radiator W/ 2.5 Inch Inlet & 2.5 Inch Outlet By BESTfit Replaces 2586042C91, 2507374C91Replace your worn or damaged radiator with the BESTfit 38.1875 x 25.125 Inch Plastic Aluminum Radiator for...
    07-070276
    SKU:
    07-070276
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    International
    Product Type:
    Engine Parts
    $1,046.99
    Qty in Cart: 0
    Price:
    $1,046.99
    Subtotal:
  • FREE SHIPPING
    BESTfit Aluminum Upper Fuel Tank Mounting Bracket For Peterbilt W/ 23 Inch Diameter Tanks

    BESTfit Aluminum Upper Fuel Tank Mounting Bracket For Peterbilt W/ 23 Inch Diameter Tanks

    BESTFIT TRUCK PARTS

    $335.99
    Aluminum Upper Fuel Tank Bracket For 23 Inch Diameter Fuel Tanks By BESTfitThe BESTfit Aluminum Mounting Bracket for Upper Fuel Tanks is built to provide dependable support and long-term durability...
    01-0601027
    SKU:
    01-0601027
    Truck Class:
    Heavy Duty
    Product Type:
    Fuel Tanks
    Position:
    Upper
    Material Options:
    Aluminum
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    $335.99
    Qty in Cart: 0
    Price:
    $335.99
    Subtotal:
  • 30 X 11 Inch Flexible Rubber Step With Galvanized Steel Diamond Deck Tread

    30 X 11 Inch Flexible Rubber Step With Galvanized Steel Diamond Deck Tread

    BUYERS PRODUCTS

    $246.99
    Flexible Rubber Step With Diamond Plate Deck Tread* High Quality Flexible Belted Rubber Step* Galvanized Step* Made Of Carbon Steel* Dimensions  - 30 Inch Width  - 4.75 Inch Depth  - 11 inch Step...
    09-050500027
    SKU:
    09-050500027
    Truck Class:
    Universal
    Width Options:
    30 Inch
    Height Options:
    11 Inch
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $246.99
    Qty in Cart: 0
    Price:
    $246.99
    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:
  • TPHD Boost Pressure Sensor For Mack And Volvo D11, D13, D16, Mp7, Mp8 Engines

    TPHD Boost Pressure Sensor For Mack And Volvo D11, D13, D16, Mp7, Mp8 Engines

    AFTERMARKET

    $244.99
    Mack & Volvo Boost Pressure Sensor By TPHDMaximize engine efficiency and power with the TPHD Boost Pressure Sensor, designed for Mack and Volvo D11, D13, D16, MP7, and MP8 engines. This high-quality,...
    29-071000027
    SKU:
    29-071000027
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Volvo
    Make:
    Mack
    Product Type:
    Engine Parts
    $244.99
    Qty in Cart: 0
    Price:
    $244.99
    Subtotal:
  • Long Dashboard Shelf For International ProStar

    Long Dashboard Shelf For International ProStar

    V-TRUCK CORP

    $240.99
    Take your cab to the next level with the long dashboard shelf designed for Volvo VN series trucks (2004-2018). This aftermarket shelf transforms the curved factory dash into a flat, functional...
    PPR_202702
    SKU:
    PPR_202702
    Truck Class:
    Heavy Duty
    Make:
    International
    Product Type:
    Interior
    $240.99
    Qty in Cart: 0
    Price:
    $240.99
    Subtotal:
  • Long Dashboard Shelf With Drawer For Volvo VNL Gen II, VHD, VNM, VT64

    Long Dashboard Shelf With Drawer For Volvo VNL Gen II, VHD, VNM, VT64

    V-TRUCK CORP

    $238.99 - $249.99
    Maximize your interior with the Long Dashboard Shelf with Drawer, a practical interior storage solution designed to help truck drivers stay organized. This aftermarket shelf features a durable...
    PPR_202707
    SKU:
    PPR_202707
    Truck Class:
    Heavy Duty
    Make:
    Volvo
    Product Type:
    Interior
    $238.99 - $249.99
    Qty in Cart: 0
    Price:
    $238.99 - $249.99
    Subtotal:
  • Air Spring Rolling Lobe Replaces 64317. 910-16P500. RA 1954-11. 9474. W01-358-9474. 20966-01 For Reyco Granning Suspension

    Air Spring Rolling Lobe Replaces 64317. 910-16P500. RA 1954-11. 9474. W01-358-9474. 20966-01 For Reyco Granning Suspension

    AFTERMARKET

    $229.99
    Rolling Lobe Air Spring With Plastic Base- 2 Top Plate Holes & 4 Bottom Plate Holes* High Quality Air Spring* Automann Phoenix Brand* Rolling Lobe* Load At 80 PSI - 5500 Lbs* Load At 100 PSI - 7000...
    29-05100278
    SKU:
    29-05100278
    Product Type:
    Frame & Chassis
    Diameter Options:
    9 Inch
    Style Options:
    Rolling Lobe
    Height Options:
    13 Inch
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    $229.99
    Qty in Cart: 0
    Price:
    $229.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 6.25 X 4 Inch AC Drier For Freightliner & Western Star

    BESTfit 6.25 X 4 Inch AC Drier For Freightliner & Western Star

    BESTFIT TRUCK PARTS

    $48.64
    BESTfit AC Drier Replaces A22-63633-000Maintain dependable cooling and protect your AC system with the BESTfit 6.25 4 Inch AC Drier for Freightliner and Western Star. Its precise 6.25 4-inch size...
    29-070027
    SKU:
    29-070027
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Freightliner
    Product Type:
    Engine Parts
    $48.64
    Qty in Cart: 0
    Price:
    $48.64
    Subtotal:
  • MGM Service Chamber C30 Neoprene, 3 Inch Stroke Replaces 1430801

    MGM Service Chamber C30 Neoprene, 3 Inch Stroke Replaces 1430801

    AFTERMARKET

    $159.99
    C30 Neoprene MGM Service Chamber- 3 Inch StrokeHeavy-duty trucks demand dependable brakes, and the MGM Service Chamber C30 Neoprene, 3 Inch Stroke delivers exactly that. Replacing 1430801, this C30...
    09-05170277
    SKU:
    09-05170277
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $159.99
    Qty in Cart: 0
    Price:
    $159.99
    Subtotal:
  • BESTfit Volvo/Mack DPF Gasket For Volvo & Mack Replaces 20863879, 21371338, ENVGVM10

    BESTfit Volvo/Mack DPF Gasket For Volvo & Mack Replaces 20863879, 21371338, ENVGVM10

    BESTFIT TRUCK PARTS

    $27.99
    Diesel Particulate Filter Gasket By BESTfit Replaces 20863879, 21371338, ENVGVM10 Fits Volvo & MackBuilt for durability and performance, the BESTfit Volvo/Mack DPF Gasket replaces OEM part numbers...
    29-08090027
    SKU:
    29-08090027
    Product Type:
    Exhaust
    Make:
    Volvo
    Make:
    Mack
    $27.99
    Qty in Cart: 0
    Price:
    $27.99
    Subtotal:
  • Power Steering Pump Replaces RP221615A. RP221615AX. PS251615R114

    Power Steering Pump Replaces RP221615A. RP221615AX. PS251615R114

    AFTERMARKET

    $479.99
    Power Steering Pump- PS Type* High Quality Power Steering Pump* TRW-PS Type* 25 CC Displacement* 4.23 GPM* 2175 PSI* RH CW Rotation* 11 Tooth* 18 Degree Offset* (1) 1/16 - 12 UN-2B Inlet Port (Right...
    29-07120027
    SKU:
    29-07120027
    Product Type:
    Engine Parts
    Material Options:
    Aluminum
    Make:
    Universal Items
    $479.99
    Qty in Cart: 0
    Price:
    $479.99
    Subtotal:
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