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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

    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

    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

    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

    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

    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

    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

    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

    Semi Truck Boot Brush Guide: Does it Really Keep Your Cab Clean?(Post)

    Boot Brushes: The Key Takeaways Benefits: Keeps cab floors clean, improves footwear grip on steps and pedals, projects a professional appearance, prevents grit from grinding down interior flooring, a

    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 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

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  • FREE SHIPPING OVER $249
    5 Inch Aluminized Multi-Bend Turbo Pipe Replaces 04-17094-012 For Freightliner FLD

    5 Inch Aluminized Multi-Bend Turbo Pipe Replaces 04-17094-012 For Freightliner FLD

    AFTERMARKET

    $124.99
    Multi-Bend 5 Inch Aluminized Turbo Pipe Without Pyrometer Fitting Fits Freightliner FLD* High Quality Multi-Bend Turbo Pipe* Made Of Aluminized Steel* Multi-Bend Turbo Pipe For Freightliner* 5 Inch...
    03-08140120
    SKU:
    03-08140120
    Material Options:
    Steel
    Finish Options:
    Chrome-Plated
    Truck Class:
    Heavy Duty
    Product Type:
    Exhaust
    Make:
    Freightliner
    $124.99
    Qty in Cart: 0
    Price:
    $124.99
    Subtotal:
  • High Flow Performance Air Filter With Washable Element Media For Freightliner, International & Ford

    High Flow Performance Air Filter With Washable Element Media For Freightliner, International & Ford

    FLEET FILTERS

    $443.99
    High Flow Performance Air Filter With Washable Element Media Fits Freightliner, InternationalYou never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the...
    29-071300012
    SKU:
    29-071300012
    Truck Class:
    Heavy Duty
    Make:
    Sterling
    Product Type:
    Engine Parts
    $443.99
    Qty in Cart: 0
    Price:
    $443.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Dock Bumper Rubber 3 X 6 X 3 Inch Dock Bumper

    Dock Bumper Rubber 3 X 6 X 3 Inch Dock Bumper

    AUTOMANN USA

    $12.71
    Dock Bumper- 3 X 6 X 3 Inch Replaces B5500, 31497, 43445Safeguard your loading areas with the Rubber 3 X 6 X 3 Inch Dock Bumper, designed to absorb impact and prevent costly damage. Constructed from...
    09-012500
    SKU:
    09-012500
    Truck Class:
    Universal
    Make:
    Universal Items
    Ready To Ship:
    Yes
    Height Options:
    3 Inch
    Product Type:
    Bumpers
    Length Options:
    3 1/2 Inch
    Width Options:
    6 Inch
    Material Options:
    Rubber
    $12.71
    Qty in Cart: 0
    Price:
    $12.71
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    BESTfit Cabin Air Filter 14 X 6 Inch For Mack CV, CX & CH Replaces 82745222

    BESTfit Cabin Air Filter 14 X 6 Inch For Mack CV, CX & CH Replaces 82745222

    BESTFIT TRUCK PARTS

    $23.99
    14 X 6 Inch Cabin Air Filter By BESTfit Fits Mack CV, CX & CH Replaces 82745222Improve cab air quality and HVAC performance with the BESTfit Cabin Air Filter for Mack CV, CX, and CH trucks, designed...
    11-150300012
    SKU:
    11-150300012
    Product Type:
    Interior
    Width Options:
    1 Inch
    Length Options:
    14 Inch
    Height Options:
    6 Inch
    Make:
    Mack
    $23.99
    Qty in Cart: 0
    Price:
    $23.99
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  • BESTfit 6.25 X 12.375 X 1.25 Inch Paper Cabin Air Filter Replaces 3839141-C1 For International

    BESTfit 6.25 X 12.375 X 1.25 Inch Paper Cabin Air Filter Replaces 3839141-C1 For International

    BESTFIT TRUCK PARTS

    $14.99
    BESTfit Paper Cabin Air Filter Fits International* High Quality Cabin Air Filter* Length: 12-3/8 Inch * Height: 6-1/4 Inch * Thickness: 1-1/4 Inch * Sold Individually* Warranty On Cabin Air Filter...
    07-150300012
    SKU:
    07-150300012
    Truck Class:
    Heavy Duty
    Length Options:
    12 Inch
    Make:
    International
    Product Type:
    Interior
    $14.99
    Qty in Cart: 0
    Price:
    $14.99
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  • FASS Spin- On Water Separator Fuel Filter For FASS Drop- In Series Fuel System

    FASS Spin- On Water Separator Fuel Filter For FASS Drop- In Series Fuel System

    FASS

    $35.19
    Spin- On Water Separator Fuel Filter Use With FASS Drop- In Series Fuel SystemsEnsure cleaner fuel and better engine protection with the FASS Spin-On Water Separator Fuel Filter designed for FASS...
    09-07030012
    SKU:
    09-07030012
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $35.19
    Qty in Cart: 0
    Price:
    $35.19
    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:
  • Aluminized Steel Exhaust Elbow Replaces 04-17094-012 For Freightliner

    Aluminized Steel Exhaust Elbow Replaces 04-17094-012 For Freightliner

    UNITED PACIFIC

    $131.99
    Aluminized Exhaust ElbowThis aluminized steel exhaust elbow for excellent rust resistance replaces. Made for specific Freightliner models, it replaces part number 17094-012. Shop 4 State Trucks for...
    03-08070003
    SKU:
    03-08070003
    Material Options:
    Aluminized Steel
    Truck Class:
    Heavy Duty
    Style Options:
    Elbow Multi-Bend
    Make:
    Freightliner
    Product Type:
    Exhaust
    $131.99
    Qty in Cart: 0
    Price:
    $131.99
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  • 84 Inch Stainless Sleeper Panels W/ 10 P1 Amber/Amber LEDs For Freightline Classic, FLD 120 SBA

    84 Inch Stainless Sleeper Panels W/ 10 P1 Amber/Amber LEDs For Freightline Classic, FLD 120 SBA

    PHOENIX DESIGN

    $406.99
    84 Inch Sleeper Panels W/ 10 P1 Amber LED Amber Lens* High Quality Sleeper Panel* Made Of 304 Stainless Steel * 5 P1 Lights Per Side* Amber LED/Amber Lens* 84 Inches* For Trucks With Cab Mounted...
    03-101200012
    SKU:
    03-101200012
    Length Options:
    84 Inch
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Light Options:
    With Lights
    Make:
    Freightliner
    Finish Options:
    Polished
    Product Type:
    Exterior
    $406.99
    Qty in Cart: 0
    Price:
    $406.99
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  • FASS Fuel Filter Housing Delete For Cummins 6.7L Engine 2010-2018

    FASS Fuel Filter Housing Delete For Cummins 6.7L Engine 2010-2018

    FASS

    $63.99
    Fuel Filter Housing DeleteStreamline your diesel fuel system with the FASS Fuel Filter Housing Delete for 2010-2018 Ram 6.7L Cummins engines. This high-quality delete kit is engineered to remove the...
    29-070300012
    SKU:
    29-070300012
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $63.99
    Qty in Cart: 0
    Price:
    $63.99
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  • Stainless Steel Passenger Side Exhaust Filter For Peterbilt 300 Series

    Stainless Steel Passenger Side Exhaust Filter For Peterbilt 300 Series

    PHOENIX DESIGN

    $341.99
    Passenger Side Exhaust Filter* High Quality Exhaust Filter* Cab/Cowl 1 Piece (Bodyline)* Stainless Steel* Passenger Side* Sold Individually* Warranty On Exhaust Filters Against Defects In Workmanship...
    01-0912012331
    SKU:
    01-0912012331
    Product Type:
    Exhaust
    Position:
    Passenger Side
    Material Options:
    Stainless Steel
    Make:
    Peterbilt
    $341.99
    Qty in Cart: 0
    Price:
    $341.99
    Subtotal:
  • BESTfit 6.625 X 12.0625 X 2.625 Inch AC Evaporator Replaces 3670125-C91, 3670132-C1 For International

    BESTfit 6.625 X 12.0625 X 2.625 Inch AC Evaporator Replaces 3670125-C91, 3670132-C1 For International

    BESTFIT TRUCK PARTS

    $240.99
    BESTfit AC Evaporator With Expansion Block Fits International 4000, 7000, 8000, LoneStar & ProStar* High Quality AC Evaporator* Height: 6 5/8 Inch* Length: 12 1/16 Inch* Inlet: #8 Bead Into Txv*...
    07-070000012
    SKU:
    07-070000012
    Truck Class:
    Heavy Duty
    Make:
    International
    Product Type:
    Engine Parts
    $240.99
    Qty in Cart: 0
    Price:
    $240.99
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    BLEMISHED: Stainless Steel DPF Filter Cover For Peterbilt 389

    BLEMISHED: Stainless Steel DPF Filter Cover For Peterbilt 389

    4 STATE TRUCKS

    $879.99
    Peterbilt 389 SS DPF Filter CoverNormally $1,573.99 Plus Shipping, Buy This One Now For $1,145.00 with Free Shipping! You Save $425+ Plus Shipping Cost!***MINOR SURFACE SCRATCHES-BLEMISHED...
    ZB10001249
    SKU:
    ZB10001249
    Product Type:
    Exhaust
    $879.99
    Qty in Cart: 0
    Price:
    $879.99
    Subtotal:
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    2.375 X 7.375 X 2 Inch Rubber Dock Bumper

    2.375 X 7.375 X 2 Inch Rubber Dock Bumper

    AUTOMANN USA

    $8.72
    Dock Bumper* High Quality Dock Bumper* Made Of Rubber* 2.375 Inch x 7.375 Inch x 2 Inch* Hole One 4.625 Inch Centers* Replaces OE Number P2042-DB, T42, 111326, 30039* Sold Individually* Warranty On...
    09-012501
    SKU:
    09-012501
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Bumpers
    $8.72
    Qty in Cart: 0
    Price:
    $8.72
    Subtotal:
  • 10 x 42 x 80 Inch Convoluted Gel Foam Truck Mattress For Peterbilt

    10 x 42 x 80 Inch Convoluted Gel Foam Truck Mattress For Peterbilt

    OPP - ORIGINAL PARTS PROGRAM

    $404.99
    10 x 42 x 80 Inch Convoluted Gel Foam MattressThe convoluted gel foam truck mattress measures 10 x 42 x 80 inches. It features a durable construction with a 4.5-inch convoluted foam core for support...
    29-154500012
    SKU:
    29-154500012
    Color:
    Black
    Width Options:
    32 Inch
    Length Options:
    79 Inch
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Interior
    Ready To Ship:
    Yes
    $404.99
    Qty in Cart: 0
    Price:
    $404.99
    Subtotal:
  • 12.5 Inch Drop Visor W/ 10 Beehive Amber LEDs For International LT, LoneStar & ProStar W/ Hi Rise Pro Sleeper

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

    ROADWORKS

    $728.99
    12.5 Inch Stainless Steel Drop Visor W/ 10 Beehive Amber LEDs Fits International* High Quality Drop Visor* Made Of Stainless Steel * 12.5 Inch * With 10- 2 Inch Round Amber/Amber Beehive LED Lights *...
    07-090000012
    SKU:
    07-090000012
    Location:
    Made In USA
    Light Options:
    With Lights
    Height Options:
    12 Inch
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    International
    Finish Options:
    Polished
    Type Options:
    Standard Mount
    Product Type:
    Exterior
    Style Options:
    Drop
    $728.99
    Qty in Cart: 0
    Price:
    $728.99
    Subtotal:
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    Carrier Bearing Kit With Bracket Replaces 210121-1X CB2101211XSA

    Carrier Bearing Kit With Bracket Replaces 210121-1X CB2101211XSA

    OPP - ORIGINAL PARTS PROGRAM

    $108.99
    Carrier Bearing Kit* High Quality Carrier Bearing Kit* 17N Series With Bracket* Sold As Kit* Warranty On Hub Adapter Against Defects In Workmanship & Material From Date Of Purchase*|** This Is An OEM...
    CB2101211XSA
    SKU:
    CB2101211XSA
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $108.99
    Qty in Cart: 0
    Price:
    $108.99
    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:
  • Stainless Steel Sleeper Panels W/ Fairings, 10 P1 Amber/Amber LEDs For Volvo VNL Gen II 730/780 2004 - 2018

    Stainless Steel Sleeper Panels W/ Fairings, 10 P1 Amber/Amber LEDs For Volvo VNL Gen II 730/780 2004 - 2018

    PHOENIX DESIGN

    $640.99
    Sleeper Panels W/ Fairings & 10 P1 Amber LED Amber Lens Lights Fit Volvo VNL Gen II 730 & 780* High Quality Sleeper Panel* Made Of 304 Stainless Steel * 5 P1 Lights Per Side* Amber LED/Amber Lens* 51...
    13-101200000
    SKU:
    13-101200000
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Light Options:
    With Lights
    Make:
    Volvo
    Finish Options:
    Polished
    Length Options:
    41 Inch
    Product Type:
    Exterior
    $640.99
    Qty in Cart: 0
    Price:
    $640.99
    Subtotal:
  • 16 X 12 Inch Stainless Steel Reverse Bowtie Visor W/ 10 3/4 Inch Light Holes For Kenworth T680

    16 X 12 Inch Stainless Steel Reverse Bowtie Visor W/ 10 3/4 Inch Light Holes For Kenworth T680

    TWELVE GAUGE

    $509.99
    16 X 12 Inch Reverse Bowtie Visor W/ 10 3/4 Inch Light Holes* High Quality Visor* Reverse Bowtie Style* Slammed (Tight To) Against Glass* (10) 3/4 Inch Light Holes (Lights Not Included)* Brushed...
    02-09010128
    SKU:
    02-09010128
    Material Options:
    Stainless Steel
    Height Options:
    16 Inch
    Product Type:
    Exterior
    Style Options:
    Reverse Bowtie
    Light Options:
    Without Lights
    Make:
    Kenworth
    $509.99
    Qty in Cart: 0
    Price:
    $509.99
    Subtotal:
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