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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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  • Stainless Steel Diesel Particulate Filter Replaces CP232717 For International W/ MaxxForce 13 Engine

    Stainless Steel Diesel Particulate Filter Replaces CP232717 For International W/ MaxxForce 13 Engine

    GLOBAL EMISSIONS

    $2,235.99
    Stainless Steel Diesel Particulate Filter Fits International W/ MaxxForce 13 Engine - Replaces CP232717* High Quality Diesel Particulate Filter* Made Of Stainless Steel * OEM Quality Clamps And...
    07-080600008
    SKU:
    07-080600008
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    International
    Product Type:
    Exhaust
    $2,235.99
    Qty in Cart: 0
    Price:
    $2,235.99
    Subtotal:
  • FREE SHIPPING OVER $249
    TPHD 1.5 Inch Oil Filler Cap W/ T Handle

    TPHD 1.5 Inch Oil Filler Cap W/ T Handle

    TURNPIKE TRUCK TRIM

    $10.94
    Oil Filler Cap By TPHDMaintain peak engine performance with the TPHD 1.5 Inch Oil Filler Cap with T Handle, a high-quality, durable solution for your truck. Its secure design prevents oil leaks and...
    09-072008
    SKU:
    09-072008
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $10.94
    Qty in Cart: 0
    Price:
    $10.94
    Subtotal:
  • High Flow Performance Air Filter With Washable Element Media For GM, Freightliner, Mack, Western Star - Pair

    High Flow Performance Air Filter With Washable Element Media For GM, Freightliner, Mack, Western Star - Pair

    FLEET FILTERS

    $839.99
    High Performance Air Filter Media Fits GM, Freightliner, Mack, Western Star - PairYou never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only...
    29-090500008
    SKU:
    29-090500008
    Truck Class:
    Heavy Duty
    Make:
    Freightliner
    Product Type:
    Exterior
    $839.99
    Qty in Cart: 0
    Price:
    $839.99
    Subtotal:
  • FREE SHIPPING OVER $249
    DEF Filter Kit W/ Element, Cartridge & End Cap Replaces 4388378, 5579176 For Freightliner

    DEF Filter Kit W/ Element, Cartridge & End Cap Replaces 4388378, 5579176 For Freightliner

    AFTERMARKET

    $113.99
    DEF Filter Kit W/ Element, Cartridge & End Cap By Freightliner Replaces 4388378, 5579176Restore proper DEF system filtration with this premium DEF Filter Kit, a direct replacement for Freightliner...
    03-06070008
    SKU:
    03-06070008
    Product Type:
    Fuel Tanks
    $113.99
    Qty in Cart: 0
    Price:
    $113.99
    Subtotal:
  • 17 Inch Drop Visor W/ 10 Combo Slotted Light Holes For Volvo VNL Flat Top & Day Cab

    17 Inch Drop Visor W/ 10 Combo Slotted Light Holes For Volvo VNL Flat Top & Day Cab

    ARANDA TRUCK ACCESSORIES

    $788.99
    17 Inch Drop Visor W/ 10 Combo Slotted Light Holes Fits Volvo VNL Flat Top & Day Cab* High Quality Aranda Drop Visor* Made Of Stainless Steel* Fits Flat Top/ Day Cab* 17 Inches * With 10 Combo Light...
    13-09003008
    SKU:
    13-09003008
    Height Options:
    17 Inch
    Truck Class:
    Heavy Duty
    Make:
    Volvo
    Light Options:
    Without Lights
    Finish Options:
    Polished
    Material Options:
    Stainless Steel
    Type Options:
    Standard Mount
    Product Type:
    Exterior
    Cab Style:
    Flat Top
    Style Options:
    Drop
    $788.99
    Qty in Cart: 0
    Price:
    $788.99
    Subtotal:
  • BESTfit 70 Amp 12V 4 Terminal Carrier Relay With Diode Protection - Replaces 10-00328-00

    BESTfit 70 Amp 12V 4 Terminal Carrier Relay With Diode Protection - Replaces 10-00328-00

    BESTFIT TRUCK PARTS

    $27.99
    BESTfit 12V SPDT 70 Amp 4 Terminal Carrier Relay* High Quality Relay* Volts: 12V* Type: Spdt N.O.* Amps/Cfm/Btus: 70 Amp* Notes: 4 Terminal 2 Large 2 Small* Diode Protection: W/Diode* Sold...
    09-070000082
    SKU:
    09-070000082
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $27.99
    Qty in Cart: 0
    Price:
    $27.99
    Subtotal:
  • Stainless Steel Rear Air Cleaner Light Panels W/ 10 P3 Light Holes For Western Star Constellation 1997 - 2016

    Stainless Steel Rear Air Cleaner Light Panels W/ 10 P3 Light Holes For Western Star Constellation 1997 - 2016

    PHOENIX DESIGN

    $179.99
    Stainless Steel Rear Air Cleaner Light Panels W/ 10 P3 Light Holes Fit Western Star Constellation* High Quality Rear A/C Light Box* Made Of 304 Stainless Steel* 5 P3 Light Holes Per Side* Lights Not...
    14-090500008
    SKU:
    14-090500008
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Western Star
    Finish Options:
    Polished
    Product Type:
    Exterior
    $179.99
    Qty in Cart: 0
    Price:
    $179.99
    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:
  • Filter Wrench Ratcheting Chain

    Filter Wrench Ratcheting Chain

    AUTOMANN USA

    $51.99
    Filter Wrench Racheting Chain* High Quality Ratcheting Chain* Fits 3 Inch Thru 4.5 Inch Diameters* Sold Individually* Warranty On Ratcheting Chain Against Defects In Workmanship & Material From Date...
    09-2100088
    SKU:
    09-2100088
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $51.99
    Qty in Cart: 0
    Price:
    $51.99
    Subtotal:
  • Whiting SS Step Bolt 1/4-20 x 1-3/8 Inch - 10 pk

    Whiting SS Step Bolt 1/4-20 x 1-3/8 Inch - 10 pk

    AUTOMANN USA

    $22.02
    1.35 Inch Whiting Stainless Steel Step Bolt Replaces 10-1003-150Whiting Stainless Steel Step Bolts are designed for use with the bottom roller bracket on trailer rolling doors. These 1.35 inch bolts...
    19-09140008
    SKU:
    19-09140008
    Material Options:
    Steel
    Length Options:
    1 1/8 Inch
    Truck Class:
    Heavy Duty
    Make:
    Trailer
    Product Type:
    Trailer
    $22.02
    Qty in Cart: 0
    Price:
    $22.02
    Subtotal:
  • Tie Rod End Driver Side - 6073381010 For Freightliner Cascadia, Volvo VNL Gen II

    Tie Rod End Driver Side - 6073381010 For Freightliner Cascadia, Volvo VNL Gen II

    AFTERMARKET

    $69.99
    Tie Rod End, 5.394 Inch Center To End W/ Left Handed Thread* High Quality Tie Rod End* Driver Side * Height Of Taper- 2.224 Inch * 5.394 In C To End* 1-1/8-12 In Stud* Taper Minor Diameter- 0.965...
    29-05090082
    SKU:
    29-05090082
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Freightliner
    Make:
    Volvo
    Product Type:
    Frame & Chassis
    $69.99
    Qty in Cart: 0
    Price:
    $69.99
    Subtotal:
  • 3 Inch SS Cab Panels W/ 10 - 3/4 Inch Amber/Clear LEDs, Block Heater Plug Hole For Freightliner Cascadia 116/126 Daycab

    3 Inch SS Cab Panels W/ 10 - 3/4 Inch Amber/Clear LEDs, Block Heater Plug Hole For Freightliner Cascadia 116/126 Daycab

    PANELITE

    $620.99
    Stainless Steel Cab Panels W/ Block Heater Plug Fits Freightliner Cascadia 116/126 Day Cab* High Quality Cab Panels* Made Of 304 Stainless Steel* Amber/Clear Lights* Hole For Block Heater Plug*...
    03-091200008
    SKU:
    03-091200008
    Truck Class:
    Heavy Duty
    Light Options:
    With Lights
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Make:
    Freightliner
    Finish Options:
    Paintable
    Length Options:
    40 Inch
    Product Type:
    Exterior
    $620.99
    Qty in Cart: 0
    Price:
    $620.99
    Subtotal:
  • Engine Fuel Filter Cap Replaces A4720920408, A472092708 For Detroit Diesel DD15 EPA07 EPA10

    Engine Fuel Filter Cap Replaces A4720920408, A472092708 For Detroit Diesel DD15 EPA07 EPA10

    AFTERMARKET

    $57.99
    Engine Fuel Filter Cap* High Quality Filter Cap * Sold Individually* Warranty On Filter Caps Against Defects In Workmanship & Material From Date Of Purchase*** High Quality Aftermarket Replacement...
    29-07120008
    SKU:
    29-07120008
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $57.99
    Qty in Cart: 0
    Price:
    $57.99
    Subtotal:
  • Power Steering Reservoir J86-1045-008 For Kenworth T680 , Peterbilt 579

    Power Steering Reservoir J86-1045-008 For Kenworth T680 , Peterbilt 579

    AFTERMARKET

    $312.99
    Power Steering Reservoir ReplacementThis replacement power steering reservoir is designed for select Kenworth and Peterbilt trucks. The reservoir comes with a cap, cover, gasket, and clamp to replace...
    29-07120011
    SKU:
    29-07120011
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $312.99
    Qty in Cart: 0
    Price:
    $312.99
    Subtotal:
  • AC Stat Seal Gaskets No. 6 Red- 10 Pack For Freightliner Cascadia 113, 125

    AC Stat Seal Gaskets No. 6 Red- 10 Pack For Freightliner Cascadia 113, 125

    AUTOMANN USA

    $29.19
    Air Conditioner Seal Gaskets No. 6 RedPrevent refrigerant leaks and maintain system pressure with this No. 6 Red AC Stat Seal Gaskets 10 Pack for Freightliner Cascadia 113 and 125. Each gasket is...
    03-07000008
    SKU:
    03-07000008
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Freightliner
    Product Type:
    Engine Parts
    $29.19
    Qty in Cart: 0
    Price:
    $29.19
    Subtotal:
  • Tie Rod End Passenger Side - 6073382410 For Freightliner Cascadia, Volvo VNL Gen II

    Tie Rod End Passenger Side - 6073382410 For Freightliner Cascadia, Volvo VNL Gen II

    AFTERMARKET

    $69.99
    Tie Rod End, 5.394 Inch Center To End W/ Right Handed Threads* High Quality Tie Rod End* Passenger Side * Height Of Taper- 2.224 Inch* 5.394 In C To End* 1-1/8-12 In Stud* Taper Minor Diameter- 0.965...
    29-05090083
    SKU:
    29-05090083
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Freightliner
    Make:
    Volvo
    Product Type:
    Frame & Chassis
    $69.99
    Qty in Cart: 0
    Price:
    $69.99
    Subtotal:
  • Roadworks 13 Inch Drop Visor W/ 10 Amber LED Bullseye Lights & Amber Lens For Peterbilt W/ Curved Windshield

    Roadworks 13 Inch Drop Visor W/ 10 Amber LED Bullseye Lights & Amber Lens For Peterbilt W/ Curved Windshield

    ROADWORKS

    $679.99
    13 Inch Drop Visor W/ 10 Amber LED Bullseye Lights & Amber Lens By Roadworks Fits Peterbilt W/ Curved WindshieldWhen performance meets style, the 13 Inch Stainless Steel Blind Mount Drop Visor stands...
    01-0900000089
    SKU:
    01-0900000089
    Product Type:
    Exterior
    Cab Style:
    Curved Windshield
    Color:
    Amber
    Material Options:
    Stainless Steel
    Height Options:
    13 Inch
    Location:
    Made In USA
    Style Options:
    Drop
    Finish Options:
    Polished
    Light Options:
    With Lights
    Make:
    Peterbilt
    $679.99
    Qty in Cart: 0
    Price:
    $679.99
    Subtotal:
  • Rear 10 Leaf Camel Back Spring - 52628 For Hendrickson

    Rear 10 Leaf Camel Back Spring - 52628 For Hendrickson

    AFTERMARKET

    $1,659.99
    Mack Back Spring - 10 Leaves Replaces Part 52628* High Quality Leaf Camel Back Spring* Arch- 7-1/8* Spring Eye- No* Number Of Leaves- 10* Center Bolt Size- 1/2 X 9* Made In USA* Sold Individually*...
    11-05100008
    SKU:
    11-05100008
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Mack
    Product Type:
    Frame & Chassis
    $1,659.99
    Qty in Cart: 0
    Price:
    $1,659.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Black Plastic Rim Protector 13.6875 Inch 10 Lug Patter W/ 1 Inch Holes

    Black Plastic Rim Protector 13.6875 Inch 10 Lug Patter W/ 1 Inch Holes

    UNITED PACIFIC

    $5.34
    13.6875 Inch Black Plastic Rim Protector 10 Lug Patter W/ 1 Inch HolesDo you need some rim protection? 4 State Trucks can equip you with black plastic rim protectors by United Pacific to safeguard...
    09-2008001
    SKU:
    09-2008001
    Truck Class:
    Universal
    Color:
    Black
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Wheels
    Ready To Ship:
    Yes
    Location:
    Made In USA
    Diameter Options:
    13 1/2 Inch
    $5.34
    Qty in Cart: 0
    Price:
    $5.34
    Subtotal:
  • Roadworks 10.5 Inch Stainless Steel Drop Visor W/ 8 Supernova Light Holes For International LoneStar, ProStar & LT

    Roadworks 10.5 Inch Stainless Steel Drop Visor W/ 8 Supernova Light Holes For International LoneStar, ProStar & LT

    ROADWORKS

    $450.99
    10.5 Inch Stainless Steel Drop Visor W/ 8 Supernova Light Holes By Roadworks Fits International LoneStar, ProStar & LTProtect your cab from sun glare and add a custom touch with the 10.5 Inch...
    07-090000084
    SKU:
    07-090000084
    Product Type:
    Exterior
    Light Options:
    Without Lights
    Style Options:
    Drop
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Make:
    International
    $450.99
    Qty in Cart: 0
    Price:
    $450.99
    Subtotal:
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