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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
    Interior Cab Fresh Air Filter Replacement For Peterbilt 377, 378, 379 & 385

    Interior Cab Fresh Air Filter Replacement For Peterbilt 377, 378, 379 & 385

    CAB FRESH FILTER CO.

    $43.85
    Peterbilt Interior Cab Fresh Air FilterThis air filter fits under the dashboard on the passenger side. Simply slide the filter into the existing track next to the passenger door. It replaces the...
    01-1503017
    SKU:
    01-1503017
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Material Options:
    Cloth
    Make:
    Peterbilt
    Product Type:
    Interior
    Ready To Ship:
    Yes
    $43.85
    Qty in Cart: 0
    Price:
    $43.85
    Subtotal:
  • 3 Layer Replacement Air Filter Wrap For 29-071300015 High Performance Air Filter For International 9000 Series & Peterbilt 348

    3 Layer Replacement Air Filter Wrap For 29-071300015 High Performance Air Filter For International 9000 Series & Peterbilt 348

    FLEET FILTERS

    $195.99
    3 Layer Replacement Air Filter Wrap For High Performance Air Filter* High Quality Replacement Air Filter Wrap* For 29-071300015* 3 Layer Design* Does Not Come Pre-Oiled* Oil Is Required Before...
    29-071300017
    SKU:
    29-071300017
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    $195.99
    Qty in Cart: 0
    Price:
    $195.99
    Subtotal:
  • 1-Piece Stainless Steel Diesel Particulate Filter Replaces 4352922, 4352922NX For Cummins ISM Engine

    1-Piece Stainless Steel Diesel Particulate Filter Replaces 4352922, 4352922NX For Cummins ISM Engine

    GLOBAL EMISSIONS

    $1,924.99
    1-Piece Stainless Steel Diesel Particulate Filter Fits Cummins ISM Engine* High Quality Diesel Particulate Filter* Made Of Stainless Steel * Exclusive 1-Piece Canister Design For Durability* OEM...
    29-080600017
    SKU:
    29-080600017
    Truck Class:
    Heavy Duty
    Style Options:
    Cummins
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Exhaust
    $1,924.99
    Qty in Cart: 0
    Price:
    $1,924.99
    Subtotal:
  • High Flow Performance Air Filter W/ Washable Element For Freightliner, Kenworth, Peterbilt & Western Star - Pair

    High Flow Performance Air Filter W/ Washable Element For Freightliner, Kenworth, Peterbilt & Western Star - Pair

    FLEET FILTERS

    $839.99
    High Flow Performance Air Filter W/ Washable Element Fits Freightliner, Kenworth, Peterbilt, Western Star - PairYou never need to waste money on paper filters again! 4 State Trucks proudly offers...
    29-090500017
    SKU:
    29-090500017
    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
    34 X 57MM Rubber/Metal Intake Manifold Gasket Kit - Replaces 12529094, 8-12529-094-0, 8-89017-465-0

    34 X 57MM Rubber/Metal Intake Manifold Gasket Kit - Replaces 12529094, 8-12529-094-0, 8-89017-465-0

    DAYTON / DORMAN

    $125.99
    34 X 57MM Rubber/Metal Intake Manifold Gasket Kit* High Quality Intake Manifold Gasket Kit* Metal And Rubber* Includes  - Upper And Lower Manifold Gaskets  - Valve Cover Caskets  - 8 Intake Bolts...
    29-071200017
    SKU:
    29-071200017
    Truck Class:
    Heavy Duty
    Make:
    Isuzu
    Product Type:
    Engine Parts
    $125.99
    Qty in Cart: 0
    Price:
    $125.99
    Subtotal:
  • DEF Urea Filter Kit For Cummins ISL, ISB, ISC & PACCAR PX-6, PX-7, PX-9 Engine Replaces 1927474PE, 2014774PE, 21496419

    DEF Urea Filter Kit For Cummins ISL, ISB, ISC & PACCAR PX-6, PX-7, PX-9 Engine Replaces 1927474PE, 2014774PE, 21496419

    DAYTON / DORMAN

    $55.99
    Diesel Exhaust Fluid Urea Filter Kit Replaces 1927474PE, 2014774PE, 21496419 Fits Cummins & PACCAR EngineImprove emissions system reliability with this DEF Urea Filter Kit for Cummins and PACCAR...
    29-06070017
    SKU:
    29-06070017
    Style Options:
    Paccar
    Product Type:
    Fuel Tanks
    Make:
    Universal Items
    $55.99
    Qty in Cart: 0
    Price:
    $55.99
    Subtotal:
  • 10 ft X 16 Inch Heavy Equipment Loading Ramps Hook End, Stub Foot - 10,000 lb. Per Axle

    10 ft X 16 Inch Heavy Equipment Loading Ramps Hook End, Stub Foot - 10,000 lb. Per Axle

    HEAVY DUTY RAMPS

    $2,056.99
    10,000 lb Capacity Heavy Equipment Portable RampsGetting heavy-duty equipment like skid steers, tractors, or loaders into your trailer is a breeze with Hook-End Equipment Portable Ramps. Made from...
    19-024017
    SKU:
    19-024017
    Length Options:
    10 Inch
    Product Type:
    Trailer
    Width Options:
    16 Inch.
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Material Options:
    Aluminum
    $2,056.99
    Qty in Cart: 0
    Price:
    $2,056.99
    Subtotal:
  • 12 X 10 Inch Stainless Steel Reverse Bowtie Visor For International Cabover

    12 X 10 Inch Stainless Steel Reverse Bowtie Visor For International Cabover

    AFTERMARKET

    $535.99
    12 X 10 Inch Stainless Steel Reverse Bowtie Visor Fits International Cabover* High Quality Reverse Bowtie Visor* 14 Gauge Stainless Steel* #8 Mirror Finish* 12 Inch X 10 Inch* COE* Sold Individually*...
    07-090100017
    SKU:
    07-090100017
    Product Type:
    Exterior
    Truck Class:
    Heavy Duty
    Make:
    International
    $535.99
    Qty in Cart: 0
    Price:
    $535.99
    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 3 Leaf Parabolic Spring - 8,200 lbs Capacity For Peterbilt 375/377, 357/378 SFA & 379 Replaces 2001799

    BESTfit 3 Leaf Parabolic Spring - 8,200 lbs Capacity For Peterbilt 375/377, 357/378 SFA & 379 Replaces 2001799

    BESTFIT TRUCK PARTS

    $657.99
    3 Leaf Parabolic Spring W/ 8200 Lb. Capacity By BESTfit Replaces 2001799 Fits Replaces 2001799Restore your truck's suspension performance with the BESTfit 4 Inch Wide 3-Leaf Parabolic Spring,...
    01-050900017
    SKU:
    01-050900017
    Width Options:
    4 Inch
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Make:
    Peterbilt
    Rating:
    8000 LBS
    Material Options:
    Steel
    $657.99
    Qty in Cart: 0
    Price:
    $657.99
    Subtotal:
  • BESTfit Air Spring Rolling Lobe With Plastic Base- W01-358-9935 For Neway/Holland Trailer Suspensions

    BESTfit Air Spring Rolling Lobe With Plastic Base- W01-358-9935 For Neway/Holland Trailer Suspensions

    BESTFIT TRUCK PARTS

    $183.99
    BESTfit Rolling Lobe Style Air Spring With Plastic Base Fits Neway/Holland Trailer SuspensionsKeep your trailer running reliably with the BESTfit Air Spring Rolling Lobe with Plastic Base-...
    19-05100017
    SKU:
    19-05100017
    Rating:
    100 PSI
    Truck Class:
    Heavy Duty
    Style Options:
    Rolling Lobe
    Material Options:
    Plastic/Poly
    Make:
    Trailer
    Product Type:
    Frame & Chassis
    $183.99
    Qty in Cart: 0
    Price:
    $183.99
    Subtotal:
  • 10 X 14 Inch Stainless Steel Bowtie Visor For Peterbilt 567 Day Cab & 579

    10 X 14 Inch Stainless Steel Bowtie Visor For Peterbilt 567 Day Cab & 579

    ARANDA TRUCK ACCESSORIES

    $574.99
    10 X 14 Inch Stainless Steel Bowtie Visor Fits Peterbilt 567 Day Cab & 579Give your Peterbilt 567 Day Cab or 579 a durable, stylish upgrade with the 14 X 10 Inch Stainless Steel Bowtie Visor...
    01-090100174
    SKU:
    01-090100174
    Material Options:
    Stainless Steel
    Location:
    Made In USA
    Product Type:
    Exterior
    Cab Style:
    Day Cab
    Height Options:
    14 Inch
    Style Options:
    Bow Tie
    Make:
    Peterbilt
    $574.99
    Qty in Cart: 0
    Price:
    $574.99
    Subtotal:
  • 12.5 Inch Drop Visor W/ 10 Bullseye Amber LEDs W/ ID Pattern For International LT, LoneStar, ProStar W/ Hi Rise Pro Sleeper

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

    ROADWORKS

    $705.99
    12.5 Inch Stainless Steel Drop Visor W/ 10 Bullseye Amber LEDs Fits International* High Quality Drop Visor* Made Of Stainless Steel * 12.5 Inch * With 10 Amber/Amber Bullseye LED Lights * ID Pattern...
    07-090000017
    SKU:
    07-090000017
    Light Options:
    With Lights
    Location:
    Made In USA
    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
    $705.99
    Qty in Cart: 0
    Price:
    $705.99
    Subtotal:
  • Twelve Ga. 14 X 10 Inch Brushed Stainless Steel Reverse Bowtie Visor For Peterbilt 589

    Twelve Ga. 14 X 10 Inch Brushed Stainless Steel Reverse Bowtie Visor For Peterbilt 589

    TWELVE GAUGE

    $833.99
    14 X 10 Inch Paintable Reverse Bowtie Visor By Twelve Ga. Fits Peterbilt 589Transform the look and function of your Peterbilt 589 with the Twelve Ga. 14 X 10 Inch Brushed Stainless Steel Reverse...
    01-090100177
    SKU:
    01-090100177
    Height Options:
    14 Inch
    Type Options:
    Bracket Mount
    Finish Options:
    Paintable
    Style Options:
    Reverse Bowtie
    Material Options:
    Stainless Steel
    Product Type:
    Exterior
    Make:
    Peterbilt
    $833.99
    Qty in Cart: 0
    Price:
    $833.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Chrome Exhaust Reducer 7 ID X 5 OD X 9.5 Inch

    Chrome Exhaust Reducer 7 ID X 5 OD X 9.5 Inch

    LINCOLN CHROME

    $185.99
    Lincoln Chrome 7 Inch To 5 Inch Exhaust Reducer* High Quality Exhaust Reducer* Made of Chrome-Plated Steel* 7 Inch ID On Top* 5 Inch OD On Bottom* 9.50 Inches Over All Length* Sold...
    09-0801754
    SKU:
    09-0801754
    Diameter Options:
    7 Inch
    Truck Class:
    Universal
    Length Options:
    9 1/2 Inch
    Material Options:
    Steel
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Location:
    Made In USA
    Product Type:
    Exhaust
    $185.99
    Qty in Cart: 0
    Price:
    $185.99
    Subtotal:
  • 15.00 X 4.00 Inch 10 Hole Brake Drum Replaces 10081079, 123421, 3721X, 17QJ4106, 123366, 85123366002, 85123421002, 61527, 61527B

    15.00 X 4.00 Inch 10 Hole Brake Drum Replaces 10081079, 123421, 3721X, 17QJ4106, 123366, 85123366002, 85123421002, 61527, 61527B

    AFTERMARKET

    $303.99
    10 Hole 15.00 X 4.00 Inch Brake Drum* High Quality Brake Drum* Balanced To 20 Inch - Oz* (10) 1 Inch Bolt Holes* For Brake SuRFace Diameter 15 Inch X 4 Inch* 8.78 Inch Overall Width* 4.78 Inch Brake...
    09-05170171
    SKU:
    09-05170171
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $303.99
    Qty in Cart: 0
    Price:
    $303.99
    Subtotal:
  • On Sale
    Limited Quantity Available
    FREE SHIPPING OVER $249
    12-10 AWG Yellow Crimp Seal Heat Shrink Spade Terminal For NO. 10 Stud - 10 PCS

    12-10 AWG Yellow Crimp Seal Heat Shrink Spade Terminal For NO. 10 Stud - 10 PCS

    AFTERMARKET

    Now: $2.44
    Was: $9.81
    12-10 AWG Heat Shrink Spade Terminal For NO. 10 Stud - 10 PCS* High Quality Heat Shrink Spade Terminal* Yellow* 10 Pieces* 12-10 AWG * No. 10 Stud * Adhesive-Lined To Seal The Connection* The...
    09-16030177
    SKU:
    09-16030177
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Air, Electrical, & Safety
    Ready To Ship:
    Yes
    Now: $2.44
    Was: $9.81
    Qty in Cart: 0
    Price:
    Now: $2.44
    Was: $9.81
    Subtotal:
  • Steer Axle Suspension Shock Absorber Replaces 1014193000, 101482000, 1014317000, 83396A, A90193, X900700973, 66458 For Freightliner Cascadia

    Steer Axle Suspension Shock Absorber Replaces 1014193000, 101482000, 1014317000, 83396A, A90193, X900700973, 66458 For Freightliner Cascadia

    AFTERMARKET

    $63.99
    Front Shock Absorber W/ 6.71 Inch StrokeThis Steer Axle Suspension Shock Absorber provides unmatched control and stability for Freightliner Cascadia front steer axles. It features an internal piston,...
    29-05090179
    SKU:
    29-05090179
    Product Type:
    Frame & Chassis
    Make:
    Freightliner
    $63.99
    Qty in Cart: 0
    Price:
    $63.99
    Subtotal:
  • On Sale
    Limited Quantity Available
    FREE SHIPPING OVER $249
    12-10 AWG Yellow Crimp Seal Heat Shrink Spade Terminal For NO. 8 Stud - 10 PCS

    12-10 AWG Yellow Crimp Seal Heat Shrink Spade Terminal For NO. 8 Stud - 10 PCS

    AFTERMARKET

    Now: $2.42
    Was: $9.81
    12-10 AWG Heat Shrink Spade Terminal For NO. 8 Stud - 10 PCS* High Quality Heat Shrink Spade Terminal* Yellow* 10 Pieces* 12-10 AWG * No. 8 Stud * Adhesive-Lined To Seal The Connection* The...
    09-16030176
    SKU:
    09-16030176
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Air, Electrical, & Safety
    Ready To Ship:
    Yes
    Now: $2.42
    Was: $9.81
    Qty in Cart: 0
    Price:
    Now: $2.42
    Was: $9.81
    Subtotal:
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