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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
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
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
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
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
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
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
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.
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
CB Radios Ultimate Guide(Post)“10-4 Roger.” Despite the rise of messaging apps, GPS devices with voice-activated messaging, and push-to-talk (PTT) apps, the classic CB radio remains among the most trusted and well-used accessorie
What Should Be in a Semi Truck Emergency Kit? (Free PDF Checklist for Drivers)(Post)Semi-truck breakdowns cost money and time; but they aren't inevitable. With the right emergency accessories, truck drivers can minimize costly delays, tackle minor repairs on the fly, and safely power
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
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
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
Haul of Fame: The Murder Pete Truck(Post)They call it the Murder Pete. Blacked-out, rugged, and raw, it’s a notorious big rig known for its “murdered out” style. Supported by the custom fab shop work of Chrome Shop Mafia (CMS) and supplied w
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
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
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Stainless Steel Diesel Particulate Filter Replaces 290-0045, 301-7856, 10R-6088 For Caterpillar C13, C15 Engines
GLOBAL EMISSIONS
$4,279.99Stainless Steel Diesel Particulate Filter Fits Caterpillar C13 & C15 Engines* High Quality Diesel Particulate Filter* Made Of Stainless Steel * OEM Quality Clamps And Gaskets Included* Sold...29-080600021- SKU:
- 29-080600021
- Truck Class:
- Heavy Duty
- Material Options:
- Stainless Steel
- Make:
- Universal Items
- Product Type:
- Exhaust
$4,279.99Qty in Cart: 0Price:$4,279.99Subtotal: -
FREE SHIPPING OVER $249
BESTfit Steering Wheel Horn Pad/Spacer 3 X 1.5 Inch C To C For Peterbilt Flat Top Cab Replaces 18-02905
BESTFIT TRUCK PARTS
$22.30Steering Wheel Horn Pad/Spacer 3 X 1.5 Inch C To C By BESTfit Replaces 18-02905The BESTfit Air Horn Horn Pad / Spacer is an essential component for Peterbilt flat top cabs, designed to securely space...1802905- SKU:
- 1802905
- Truck Class:
- Heavy Duty
- Make:
- Peterbilt
- Product Type:
- Exterior
- Ready To Ship:
- Yes
- Cab Style:
- Flat Top
$22.30Qty in Cart: 0Price:$22.30Subtotal: -
FREE SHIPPING OVER $249
Air Horn Pad 1802906 For Peterbilt 375, 377, 378 & 379
OPP - ORIGINAL PARTS PROGRAM
$69.99Peterbilt Angled Air Horn Mount - Angled SpacerNeed to mount your air horn at an angle? Check out this handy Angled Spacer (18-02906). It's perfect for getting the right position and making sure your...1802906- SKU:
- 1802906
- Truck Class:
- Heavy Duty
- Make:
- Peterbilt
- Product Type:
- Exterior
- Ready To Ship:
- Yes
$69.99Qty in Cart: 0Price:$69.99Subtotal: -
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: -
BESTfit Plastic Aluminum Radiator W/ Frame 27.5 X 25.125 X 2 Inch 2 Row Replaces 238644, 1004040 For Thomas Bus, Freightliner M45 & M55
BESTFIT TRUCK PARTS
$1,676.99Radiator W/ 2 Inch Inlet & 2 Inch Outlet By BESTfit Replaces 238644, 1004040Protect your engine from overheating with the BESTfit Plastic Aluminum Radiator with Oil Cooler, designed for Thomas Bus...03-070290- SKU:
- 03-070290
- Truck Class:
- Heavy Duty
- Material Options:
- Aluminum
- Make:
- Freightliner
- Product Type:
- Engine Parts
- Length Options:
- 2 Inch
- Width Options:
- 25 Inch
- Height Options:
- 27 Inch
- Make:
- Bus
$1,676.99Qty in Cart: 0Price:$1,676.99Subtotal: -
Stainless Cab Panels W/ 12 Round 3/4 Inch Amber/Amber LEDs, Block Heater Plug For Kenworth T800, W900
PHOENIX DESIGN
$293.99Stainless Cab Panels W/ 12 Round 3/4 Inch Amber LED Amber Lens Lights, Block Heater Plug Fits Kenworth T800 & W900* High Quality Cab Panel* Made Of 304 Stainless Steel* 6 - 3/4 Inch Round Lights Per...02-091200290- SKU:
- 02-091200290
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Light Options:
- With Lights
- Material Options:
- Stainless Steel
- Make:
- Kenworth
- Finish Options:
- Paintable
- Length Options:
- 52 Inch
- Product Type:
- Exterior
$293.99Qty in Cart: 0Price:$293.99Subtotal: -
2.5 Inch Stainless Steel Cab Panels W/ 12 Amber/Amber P3 LEDs W/ Hole For Block Heater For Peterbilt 567 121BBC SFA
PHOENIX DESIGN
$322.992.5 X 37.625 Inch 430 Stainless Steel Cab Panels W/ 1 Block Heater Plug HoleDrive with confidence and style with these 2.5-inch stainless steel cab panels for your Peterbilt 567. With 12...01-091200290- SKU:
- 01-091200290
- Light Options:
- With Lights
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Material Options:
- Stainless Steel
- Make:
- Peterbilt
- Finish Options:
- Polished
- Length Options:
- 37 Inch
- Product Type:
- Exterior
$322.99Qty in Cart: 0Price:$322.99Subtotal: -
Robert James Snap Kit For International 4300, 4400, 8500
ROBERT JAMES ENTERPRISES
$19.19Snap Kit With 12 Snaps W/ Brass Backs & SS ScrewsEasily secure your Robert James bug screen or winter front with this quality Snap Kit! The kit includes 12 brass snap backs and No. 6 stainless steel...07-120400290- SKU:
- 07-120400290
- Truck Class:
- Heavy Duty
- Location:
- Made In USA
- Make:
- International
- Product Type:
- Hood Parts & Acc.
$19.19Qty in Cart: 0Price:$19.19Subtotal: -
FREE SHIPPING OVER $249
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: -
FREE SHIPPING OVER $249
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: -
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
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
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 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
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
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: -
BESTfit 5 Inch 90 Degree BOM Multi-Bend Aluminized Exhaust Elbow For Peterbilt
BESTFIT TRUCK PARTS
$265.99Multi-Bend Aluminized Exhaust Elbow Fits Single Exhaust Peterbilt 1999-2006The BESTfit 5 Inch 90 Degree BOM Multi-Bend Aluminized Exhaust Elbow is a high-quality down pipe designed for Peterbilt...01-08150290- SKU:
- 01-08150290
- Truck Class:
- Heavy Duty
- Diameter Options:
- 5 Inch
- Style Options:
- Elbow Multi-Bend
- Material Options:
- Aluminized Steel
- Degree Options:
- 90
- Make:
- Peterbilt
- Product Type:
- Exhaust
- Ready To Ship:
- Yes
$265.99Qty in Cart: 0Price:$265.99Subtotal: -
Bostrom Pro Ride Black Ultra-Leather Lower Seat Base Cover
BOSTROM TRUCK SEATS
$329.99Bostrom Pro Ride Black Ultra-Leather Lower Seat Base CoverIf your Bostrom Pro Ride Lower seat base cover is damaged, 4 State Trucks has the quality replacement you need. This Black Ultra-Leather seat...6235712900- SKU:
- 6235712900
- Truck Class:
- Heavy Duty
- Material Options:
- Ultra Leather
- Make:
- Universal Items
- Type Options:
- Low Base
- Product Type:
- Seats
$329.99Qty in Cart: 0Price:$329.99Subtotal: -
RigMaster APU Fuel Injector Pump Kit For Kohler Engine
RIGMASTER
$954.99Kohler Diesel OEM Part ED0065851510-S Fuel Feeding Pump* High Quality Injection Pump Kit* Includes - Fuel Injector Pump - Fuel Injector Spark Arrestor - Copper Washer* Sold Individually* Warranty...ED0065902900SK- SKU:
- ED0065902900SK
- Truck Class:
- Heavy Duty
- Material Options:
- Plastic/Poly
- Location:
- Made In USA
- Make:
- Universal Items
- Product Type:
- Engine Parts
$954.99Qty in Cart: 0Price:$954.99Subtotal: -
L. Rosewood Screw-In Tractor Knob W/ Purple Iron Cross
GRAND GENERAL
$42.67L. Rosewood Screw-In Knob W/ Purple Iron Cross & Stainless Steel Tractor Script* High Quality Knob* Rosewood* With Purple Iron Cross * Stainless Steel Tractor Script* Sold Individually* Warranty On...09-15010290- SKU:
- 09-15010290
- Truck Class:
- Heavy Duty
- Product Type:
- Interior
- Material Options:
- Stainless Steel
- Color:
- Purple
- Make:
- Universal Items
$42.67Qty in Cart: 0Price:$42.67Subtotal: