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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
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
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.
The Best Semi Truck Half Fenders for Your Big Rig(Post)Upgrading and customizing your truck is part of a long-term vision. After your bumpers and hoods, add some fenders - more specifically: half fenders. Semi truck half fenders are an exceptional way to
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
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
How to Install Rear Fenders on a Peterbilt 379(Post)The process of installing rear fenders on a semi truck, specifically a Peterbilt 379 model, will depend on the type of fender. Whether it’s a full fender or half fender, the difference comes down to:
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
7 Best Exterior Chrome Upgrades for the Kenworth W900A(Post)Outfit your Kenworth W900A model with stunning exterior chrome accessories and stainless-steel upgrades that seamlessly tie together the entire truck’s theme. Classic big rig owners take a lot of prid
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Pre-Filter For Air Cleaner For Kenworth & Peterbilt
CAB FRESH FILTER CO.
$33.71Pre-Filter For Air Cleaner Fits Kenworth & PeterbiltWe offer aftermarket CAB Fresh pre-filters for air cleaners that fits Kenworth T680, T880, Peterbilt 567 and 579 big rigs. It features activated...29-0905708- SKU:
- 29-0905708
- Truck Class:
- Heavy Duty
- Location:
- Made In USA
- Material Options:
- Cloth
- Make:
- Peterbilt
- Make:
- Kenworth
- Product Type:
- Exterior
- Ready To Ship:
- Yes
$33.71Qty in Cart: 0Price:$33.71Subtotal: -
Cab Fresh Pre-Filter For Freightliner Century, Columbia And Coronado Models
CAB FRESH FILTER CO.
$14.27Pre-Filter Mounts Under Hood on Passenger Side* High Quality Pre-Filter* Filter Mounts Under Hood On Passenger Side* Made In USA* Sold Individually* Warranty On Pre-Filters Against Defects In...03-09057000- SKU:
- 03-09057000
- Truck Class:
- Heavy Duty
- Material Options:
- Steel
- Make:
- Freightliner
- Product Type:
- Exterior
$14.27Qty in Cart: 0Price:$14.27Subtotal: -
FREE SHIPPING OVER $249
13 Inch Vortox Breather Air Filter Element AF25480 For Kenworth & Peterbilt
OPP - ORIGINAL PARTS PROGRAM
$102.99Air Filter Element Fits 13 Inch Vortox Air CleanersNeed a reliable air filter for your ride? Check out the 13" VORTOX BRTHR air filter element. It's built tough and designed to keep your engine...29-0905703- SKU:
- 29-0905703
- Truck Class:
- Heavy Duty
- Make:
- Kenworth
- Make:
- Peterbilt
- Product Type:
- Exterior
- Ready To Ship:
- Yes
$102.99Qty in Cart: 0Price:$102.99Subtotal: -
15 Inch Diameter Air Filter Replaces AF4197 For Late Model PACCAR With Donaldson
AFTERMARKET
$153.99Air Filter For 15 Inch Donaldson Air Intake Cleaner* High Quality Air Filter * 15 Inch* Fits Late Model PACCAR With Donaldson Air Cleaner* Sold Individually* Warranty On Air Filter Element Against...29-0905709- SKU:
- 29-0905709
- Truck Class:
- Heavy Duty
- Product Type:
- Exterior
- Ready To Ship:
- Yes
$153.99Qty in Cart: 0Price:$153.99Subtotal: -
Air Filter For Old Style 11 Inch Donaldson Air Cleaners P181007 LAF7797 PA2312
OPP - ORIGINAL PARTS PROGRAM
$94.9910.39 Dia X 22.83 L Old Style Air Filter* High Quality Air Filter* For Old Style 11 Inch Donaldson Air Cleaners * 22.83 OAL * 10.39 Inch Diameter* Sold Individually* Warranty On Air Filters Against...29-0905706- SKU:
- 29-0905706
- Truck Class:
- Heavy Duty
- Length Options:
- 23 Inch
- Style Options:
- Donaldson Style
- Make:
- Universal Items
- Product Type:
- Exterior
- Diameter Options:
- 10 Inch
$94.99Qty in Cart: 0Price:$94.99Subtotal: -
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Air Cleaner Air Filter 15 x 27 Inch Replaces AF865FLG For Peterbilt & Kenworth
OPP - ORIGINAL PARTS PROGRAM
$127.9915 Inch Vortox Air Cleaner Filter Replaces AF865FLGKeep your air pure and clean with the premium 15 Inch Air Filter, exclusively designed as a perfect replacement for Vortox Air Cleaners...29-0905700- SKU:
- 29-0905700
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Make:
- Peterbilt
- Make:
- Kenworth
- Product Type:
- Exterior
- Ready To Ship:
- Yes
$127.99Qty in Cart: 0Price:$127.99Subtotal: -
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Air Filter Element 11.5 OD x 23.5 Inch Replaces AF25858, 5839AF25247 For Freightliner, Kenworth & Peterbilt
OPP - ORIGINAL PARTS PROGRAM
$94.9911.5 Inch OD Air Filter ElementReplace the air filter in your 13 inch classic Donaldson Air Cleaner with this quality filter element. Enjoy superior airflow, longer service intervals, and easy...29-0905701- SKU:
- 29-0905701
- Truck Class:
- Heavy Duty
- Make:
- Peterbilt
- Make:
- Freightliner
- Make:
- Kenworth
- Product Type:
- Exterior
- Style Options:
- Donaldson Style
- Height Options:
- 23 Inch
- Ready To Ship:
- Yes
$94.99Qty in Cart: 0Price:$94.99Subtotal: -
17 Inch Stainless Steel Filter Light Bar W/ 20 Round 3/4 Inch Light Holes
ARANDA TRUCK ACCESSORIES
$238.9917 Inch Filter Light Bar W/ 20 Round Light HolesUpgrade your lighting setup with the 17 Inch Stainless Steel Filter Light Bar, designed to deliver both style and heavy-duty performance. Its universal...29-0905712- SKU:
- 29-0905712
- Location:
- Made In USA
- Material Options:
- Stainless Steel
- Product Type:
- Exterior
- Height Options:
- 17 Inch
- Light Options:
- Without Lights
- Size Options:
- 18 Gauge
- Make:
- Universal Items
$238.99Qty in Cart: 0Price:$238.99Subtotal: -
National Admiral Air High Back Passenger Seat W/ Swivel, Bellows, Heat, Wide Back - Lonestar Black & Light Tan 2 Tone Leather
NATIONAL SEATING
$1,277.992 Tone Leather Admiral Air Seat Lonestar Black & Light Tan* High Quality Seat* Lonestar Black And Light Tan 2 Tone* Leather* Without Armrests* Passenger Side Swivel* Standard Features Included On...40079057- SKU:
- 40079057
- Color:
- Black
- Truck Class:
- Heavy Duty
- Style Options:
- High Back
- Material Options:
- Leather
- Make:
- Universal Items
- Type Options:
- Standard Base
- Product Type:
- Seats
$1,277.99Qty in Cart: 0Price:$1,277.99Subtotal: -
Load-Share Front Axle Air Ride Kit Without Air Springs
LOAD-SHARE SUSPENSIONS
$850.99Front Axle Air Ride Kit Without Air Springs* High Quality Air Ride Kit* Without Air Springs * Fits Various Models* Note-Some Models Need Shock Mount Kit* Sold Individually* Warranty On Air Ride Kits...29-0905710- SKU:
- 29-0905710
- Truck Class:
- Heavy Duty
- Position:
- Front
- Material Options:
- Rubber
- Product Type:
- Frame & Chassis
$850.99Qty in Cart: 0Price:$850.99Subtotal: -
National Admiral High Back Driver Air Seat W/ Swivel, Bellows, Heat, Wide Back - Lonestar Black & Light Tan 2 Tone Leather
NATIONAL SEATING
$1,277.992 Tone Leather Admiral Air Seat Lonestar Black & Light Tan* High Quality Seat* Lonestar Black And Light Tan 2 Tone* Leather* Without Armrests* Driver Side Swivel* Standard Features Included On This...40049057- SKU:
- 40049057
- Truck Class:
- Heavy Duty
- Color:
- Black
- Style Options:
- High Back
- Material Options:
- Leather
- Make:
- Universal Items
- Type Options:
- Standard Base
- Product Type:
- Seats
$1,277.99Qty in Cart: 0Price:$1,277.99Subtotal: -
Intake Pre-Filter For LAF3551 Air Filter
FREEDOM AIR FILTERS
$76.99Intake 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
$76.99Qty in Cart: 0Price:$76.99Subtotal: -
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Interior Fresh Air Filter For Peterbilt
CAB FRESH FILTER CO.
$22.07Peterbilt Interior Fresh Air Filter AssemblyKeep the inside of your cab fresh with this aftermarket interior filter from CAB Fresh. This filter features internal antimicrobials that stops mold...01-1503026- SKU:
- 01-1503026
- Truck Class:
- Heavy Duty
- Location:
- Made In USA
- Material Options:
- Cloth
- Make:
- Peterbilt
- Product Type:
- Interior
- Ready To Ship:
- Yes
$22.07Qty in Cart: 0Price:$22.07Subtotal: -
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Interior Fresh Air Filter Assembly For Peterbilt
CAB FRESH FILTER CO.
$46.91Peterbilt Fresh Air Filter AssemblyFind aftermarket interior filters with assembly from CAB Fresh at 4 State Trucks. This filter features internal antimicrobials that stops mold growth, reduces odor...01-1503025- SKU:
- 01-1503025
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Material Options:
- Cloth
- Make:
- Peterbilt
- Product Type:
- Interior
- Ready To Ship:
- Yes
$46.91Qty in Cart: 0Price:$46.91Subtotal: -
FREE SHIPPING OVER $249
Air Filter Assembly For HVAC For Peterbilt & Kenworth
CAB FRESH FILTER CO.
$38.75Air Filter Assembly Fits Peterbilt & KenworthAt 4 State Trucks we offer aftermarket CAB Fresh air filter assemblies for Peterbilt 567 and 579 models, and Kenworth T680 and T880 models. The air filter...29-1503002- SKU:
- 29-1503002
- Truck Class:
- Heavy Duty
- Location:
- Made In USA
- Material Options:
- Cloth
- Make:
- Peterbilt
- Make:
- Kenworth
- Product Type:
- Interior
- Ready To Ship:
- Yes
$38.75Qty in Cart: 0Price:$38.75Subtotal: -
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
Interior Cab Fresh Air Filter Replacement For Peterbilt 377, 378, 379 & 385
CAB FRESH FILTER CO.
$43.85Peterbilt 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
$43.85Qty in Cart: 0Price:$43.85Subtotal: -
FREE SHIPPING OVER $249
Air Filter Assembly For HVAC No Housing For Peterbilt & Kenworth
CAB FRESH FILTER CO.
$14.27Air Filter Assembly Fits Peterbilt & KenworthWe offer aftermarket CAB Fresh air filter assemblies for Peterbilt 567 and 579 models, and Kenworth T680 and T880 models. The air filter is only for HVAC...29-1503003- SKU:
- 29-1503003
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Material Options:
- Cloth
- Make:
- Kenworth
- Make:
- Peterbilt
- Product Type:
- Interior
- Ready To Ship:
- Yes
$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 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: