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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
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
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
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
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
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
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
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
The Best Exterior & Interior Tractor Trailer Accessories to Level Up Your Truck(Post)One of the best ways to start improving you rig's safety, comfort, and performance is by adding some aftermarket tractor trailer accessories, whether it's a set of pintle hooks for stronger towing or
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
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
How to Buy the Right Peterbilt 379 Radiator(Post)If you want to keep your diesel engine from overheating you need a well-functioning replacement Peterbilt radiator to properly carry the hot coolant through small passages, transfer engine heat into t
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 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
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
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
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
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FREE SHIPPING OVER $249
Cab Fresh Filter Only For Freightliner Cascadia, Century, Columbia & Coronado
CAB FRESH FILTER CO.
$17.91Cab Fresh Filter Only Fits FreightlinerFind your Cab Fresh Replacement Filter at 4 State Trucks. The highly effective filter is made with a primary layer and charcoal layer that traps and eliminates...03-091306- SKU:
- 03-091306
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Material Options:
- Cloth
- Make:
- Freightliner
- Product Type:
- Exterior
$17.91Qty in Cart: 0Price:$17.91Subtotal: -
FREE SHIPPING OVER $249
Cab Fresh Replacement HVAC Pre-Filter For Peterbilt & Kenworth
CAB FRESH FILTER CO.
$14.27Air Filter HVAC Pre-FilterKeep your HVAC system running clean and efficient with this replacement pre-filter designed to fit inside the existing housing assembly. It helps capture dust, debris, and...29-091301- SKU:
- 29-091301
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Make:
- Peterbilt
- Make:
- Kenworth
- Ready To Ship:
- Yes
- Product Type:
- Interior
$14.27Qty in Cart: 0Price:$14.27Subtotal: -
FREE SHIPPING OVER $249
Black Plastic Cab Fresh Filter For Freightliner Cascadia, Century, Columbia & Coronado
CAB FRESH FILTER CO.
$51.99Cab Fresh Filter Fits FreightlinerReplace your original filter with this cab fresh filter with a charcoal spor-ax antimicrobial layer. This charcoal layer has adsorption properties that help capture...03-091305- SKU:
- 03-091305
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Material Options:
- Plastic/Poly
- Make:
- Freightliner
- Color:
- Black
- Product Type:
- Exterior
$51.99Qty in Cart: 0Price:$51.99Subtotal: -
FREE SHIPPING OVER $249
Cab Fresh HVAC Pre-Filter W/ Black Housing For Peterbilt & Kenworth
CAB FRESH FILTER CO.
$50.99Air Filter HVAC Pre-FilterHelp protect your cab's HVAC system with this complete pre-filter assembly featuring a durable housing and replaceable filter element. Designed to capture dust, debris, and...29-091300- SKU:
- 29-091300
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Make:
- Kenworth
- Make:
- Peterbilt
- Product Type:
- Engine Parts
- Ready To Ship:
- Yes
$50.99Qty in Cart: 0Price:$50.99Subtotal: -
FREE SHIPPING OVER $249
CAB Fresh Chrome Exterior Cab Air Filter Assembly W/ Hardware For Peterbilt 357, 377, 378, 379 & 386
CAB FRESH FILTER CO.
$43.85Exterior Cab Air Filter AssemblyThis Chrome Exterior Cab Air Filter Assembly is ideal for keeping your truck's cab air fresh. Just place it behind the hood latch on the outside passenger side. You...01-091303- SKU:
- 01-091303
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Make:
- Peterbilt
- Product Type:
- Interior
- Position:
- Passenger Side
- Finish Options:
- Chrome-Plated
- Ready To Ship:
- Yes
$43.85Qty in Cart: 0Price:$43.85Subtotal: -
28 Inch Metal Frame Multi-Fit Wiper Blade
AUTOMANN USA
$20.81Metal Frame Multi-Fit Windshield Wiper Blade* High Quality Wiper Blade* 28 Inch* Metal Frame* Multi-Fit* Sold Individually* Warranty On Wiper Blades Against Defects In Workmanship & Material From...29-09110030- SKU:
- 29-09110030
- Truck Class:
- Universal
- Length Options:
- 28 Inch
- Material Options:
- Plastic/Poly
- Make:
- Universal Items
- Product Type:
- Exterior
$20.81Qty in Cart: 0Price:$20.81Subtotal: -
FREE SHIPPING OVER $249
Kenworth Cab Fresh Replacement Filter
CAB FRESH FILTER CO.
$16.16Kenworth Replacement Cab Fresh FilterFind your replacement Cab Fresh Cabin Filter at 4 State Trucks for Kenworth semi trucks. A cab fresh filter helps remove odors, dust, pollen, and other airborne...02-091302- SKU:
- 02-091302
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Make:
- Kenworth
- Product Type:
- Interior
- Ready To Ship:
- Yes
$16.16Qty in Cart: 0Price:$16.16Subtotal: -
Cab Air Pre-Filter For Freightliner FLD120 & Classic
FREEDOM AIR FILTERS
$36.99Cab Pre-Filter Fits Freightliner FLD 120 And Classic* High Quality Cab Air Pre Filter * Made Of Polyester Mesh And ABS Plastic* Color Black* UV Resistant* Sold Individually* Warranty On Pre-Filters...03-091316- SKU:
- 03-091316
- Color:
- Black
- Truck Class:
- Heavy Duty
- Material Options:
- Plastic/Poly
- Make:
- Freightliner
- Product Type:
- Interior
$36.99Qty in Cart: 0Price:$36.99Subtotal: -
FREE SHIPPING OVER $249
Cab Air Pre-Filter For Kenworth T800, W900B & W900
FREEDOM AIR FILTERS
$36.991986-2018 Fresh Air Filter Pre-Filter Fits Kenworth* High Quality Polyester And ABS Plastic Pre-Filter * 4 Mounting Screws Included* Color Black* UV Resistant* Sold Individually* Warranty On...02-091306- SKU:
- 02-091306
- Truck Class:
- Heavy Duty
- Material Options:
- Plastic/Poly
- Make:
- Kenworth
- Product Type:
- Exterior
- Ready To Ship:
- Yes
$36.99Qty in Cart: 0Price:$36.99Subtotal: -
FREE SHIPPING OVER $249
Cab Air Pre-Filter For Freightliner Cascadia
FREEDOM AIR FILTERS
$39.01Cab Air Intake Pre-Filter Fits Freightliner Cascadia* High Quality Polyester And Plastic* Mounts Over Factory Cab Air Intake Box - Air Intake Box Not Included* Includes 6 Retainer Clips For Easy...03-091315- SKU:
- 03-091315
- Truck Class:
- Heavy Duty
- Color:
- Black
- Material Options:
- Plastic/Poly
- Make:
- Freightliner
- Product Type:
- Interior
- Ready To Ship:
- Yes
$39.01Qty in Cart: 0Price:$39.01Subtotal: -
FREE SHIPPING OVER $249
Kenworth Chrome Cab Fresh Cabin Air Filter
CAB FRESH FILTER CO.
$48.79Kenworth Cab Fresh Air FilterKeep your cab smelling fresh with this highly efficient cab fresh air filter that mount next to your air cleaner. It prevents road grime and pollen from clogging your...02-091301- SKU:
- 02-091301
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Material Options:
- Plastic/Poly
- Finish Options:
- Chrome-Plated
- Make:
- Kenworth
- Product Type:
- Interior
- Ready To Ship:
- Yes
$48.79Qty in Cart: 0Price:$48.79Subtotal: -
Cab Fresh HVAC Pre-Filter For International LoneStar, LT, WorkStar
CAB FRESH FILTER CO.
$43.85Cab Fresh AC Filter Fits International LoneStar, LT & WorkStar 4000-7600* High Quality Pre-Filter * For HVAC Systems* Instructions: Remove Vent Cover On Cowling, Place Filter In Hole With White...07-091300001- SKU:
- 07-091300001
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Material Options:
- Cloth
- Make:
- International
- Product Type:
- Interior
- Ready To Ship:
- Yes
$43.85Qty in Cart: 0Price:$43.85Subtotal: -
Chrome Pre-Cleaner Engine Filter For Freightliner Conventional Classic, FLD120
CAB FRESH FILTER CO.
$74.99Chrome Pre-Cleaner Filter For Engine Fits Freightliner Classic, Classic XL & FLD120* High Quality Pre-Cleaner Filter* For Engine* Chrome* Filter Mounts On Center Of Cowling Below Windshield* Sold...03-091300001- SKU:
- 03-091300001
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Make:
- Freightliner
- Product Type:
- Engine Parts
$74.99Qty in Cart: 0Price:$74.99Subtotal: -
Black Plastic Cab Fresh Air Filter For Kenworth T600, T800 & W900L/B
CAB FRESH FILTER CO.
$40.43Black Plastic Cab Fresh Filter Fits Kenworth T600, T800 & W900Keep your Kenworth cab smelling fresh with the Cab Fresh Filter. This efficient filter conveniently mounts next to your air cleaner,...02-091313- SKU:
- 02-091313
- Truck Class:
- Heavy Duty
- Location:
- Made In USA
- Material Options:
- Plastic/Poly
- Make:
- Kenworth
- Product Type:
- Interior
- Color:
- Black
- Ready To Ship:
- Yes
$40.43Qty in Cart: 0Price:$40.43Subtotal: -
FREE SHIPPING OVER $249
Cab Fresh Replacement Filter For Peterbilt 357, 377, 378, 379 & 386
CAB FRESH FILTER CO.
$17.57Replacement Air FilterFind aftermarket CAB Fresh replacement filters for Peterbilt 375, 377 and 379 big rigs at 4 State Trucks. This filter limits the amount of diesel soot, reduces odors entering...01-091304- SKU:
- 01-091304
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Material Options:
- Cloth
- Make:
- Peterbilt
- Product Type:
- Exterior
- Ready To Ship:
- Yes
$17.57Qty in Cart: 0Price:$17.57Subtotal: -
Cab Fresh Air Filter W/ Black Housing For Freightliner Classic & FLD
CAB FRESH FILTER CO.
$42.07Air Filter W/ Black Housing For Classic & FLD* High Quality Air Filter * With Black Housing* Sold Individually* Made In USA* Warranty On Air Filter S Against Defects In Workmanship & Material From...03-091307- SKU:
- 03-091307
- Truck Class:
- Heavy Duty
- Location:
- Made In USA
- Style Options:
- Factory Style
- Material Options:
- Cloth
- Make:
- Freightliner
- Color:
- Black
- Product Type:
- Exterior
$42.07Qty in Cart: 0Price:$42.07Subtotal: -
Cab Air Pre-Filter 1/8 Thick - Black For Peterbilt 378, 379, 377, 386, 388 & 389/Glider
FREEDOM AIR FILTERS
$54.99Black 1/8 Thick Fresh Air Filter Pre-FilterProtect your cab ventilation system with this high-quality black cab air pre-filter designed for Peterbilt 379, 378, 377, 386, 388, and 389 trucks. Crafted...01-091313- SKU:
- 01-091313
- Truck Class:
- Heavy Duty
- Color:
- Black
- Material Options:
- Plastic/Poly
- Make:
- Peterbilt
- Product Type:
- Interior
- Position:
- Passenger Side
$54.99Qty in Cart: 0Price:$54.99Subtotal: -
2 to 5.5 Inch Filter Pliers
AUTOMANN USA
$20.35Oil Filter Pliers* High Quality Filter Pliers* 2 Inch To 5 1/2 Inch* Sold Individually* Warranty On Filter Pilers Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...09-21000091- SKU:
- 09-21000091
- Product Type:
- Tools
- Make:
- Universal Items
$20.35Qty in Cart: 0Price:$20.35Subtotal: -
Stainless Steel Passenger Side Exhaust Filter For Peterbilt 300 Series
PHOENIX DESIGN
$341.99Passenger 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
$341.99Qty in Cart: 0Price:$341.99Subtotal: -
Robert James 28 Inch Wine Quilted Vinyl Fuel Tank End Covers
ROBERT JAMES ENTERPRISES
$208.99Wine Quilted Vinyl End Covers For 28 Inch Diameter Fuel Tanks By Robert James* High Quality Tank Cover* Quilted Vinyl* Wine* Dimensions: - 28 Inch Diameter* Sold As Pair* Warranty On Tank Covers...29-0652809150- SKU:
- 29-0652809150
- Diameter Options:
- 28 Inch
- Truck Class:
- Heavy Duty
- Material Options:
- Vinyl
- Location:
- Made In USA
- Make:
- Universal Items
- Product Type:
- Fuel Tanks
$208.99Qty in Cart: 0Price:$208.99Subtotal: