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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
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
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
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
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
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:
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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1-Piece Stainless Steel Diesel Particulate Filter Replaces 21471269 For Mack/Volvo D11, D13, MP7, MP8 Engines
GLOBAL EMISSIONS
$2,142.991-Piece Stainless Steel Diesel Particulate Filter Fits Mack/Volvo D11, D13, MP7 & MP8 Engines* High Quality Diesel Particulate Filter* Made Of Stainless Steel * Exclusive 1-Piece Canister Design For...29-080600041- SKU:
- 29-080600041
- Truck Class:
- Heavy Duty
- Material Options:
- Stainless Steel
- Make:
- Volvo
- Make:
- Mack
- Product Type:
- Exhaust
$2,142.99Qty in Cart: 0Price:$2,142.99Subtotal: -
Gen III High Flow Performance Air Filter With Washable Element Media For Media Kenworth T660, T800, W900S
FLEET FILTERS
$585.99Gen III High Performance Air Filter Media Kenworth T660, T800, W900SYou never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime, washable,...29-071300041- SKU:
- 29-071300041
- Truck Class:
- Heavy Duty
- Make:
- Kenworth
- Product Type:
- Engine Parts
$585.99Qty in Cart: 0Price:$585.99Subtotal: -
AirDog 10- Micron Microglass Media Fuel Filter For FPII-150 & FPII-200 Fuel Systems
AIRDOG HD
$43.8610- Micron Media Fuel Filter Fits FPII-150 & FPII-200 Fuel SystemsImprove fuel system performance with the AirDog 10-Micron Microglass Media Fuel Filter for FPII-150 and FPII-200 applications. The...29-070300041- SKU:
- 29-070300041
- Product Type:
- Engine Parts
- Make:
- Universal Items
$43.86Qty in Cart: 0Price:$43.86Subtotal: -
10 Micron Fuel Water Separator Filter
OPP - ORIGINAL PARTS PROGRAM
$42.04Donaldson 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
$42.04Qty in Cart: 0Price:$42.04Subtotal: -
3M Particulate Filters- 2 Pack
ZEPHYR
$17.942 Pack Snap On 3M Particulate FiltersSafeguard your lungs with the 3M Particulate Filters - 2 Pack, high-quality replacement filters for 3M half-face and full-face respirators. NIOSH-approved for 99...09-17040041- SKU:
- 09-17040041
- Product Type:
- Air, Electrical, & Safety
- Make:
- Universal Items
$17.94Qty in Cart: 0Price:$17.94Subtotal: -
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: -
FREE SHIPPING OVER $249
BESTfit Stainless Steel Placard Holder 193, 3-TPH, 3TPH,53004161
BESTFIT TRUCK PARTS
$76.99BESTfit Placard HolderThis durable placard is made from bright .018-inch stainless steel with riveted construction. Clipped corners make it easy to fit on a roll-up door panel.* High Quality Placard...09-020417- SKU:
- 09-020417
- Height Options:
- 13 Inch
- Truck Class:
- Universal
- Width Options:
- 11 Inch
- Material Options:
- Stainless Steel
- Make:
- Universal Items
- Product Type:
- Air, Electrical, & Safety
- Ready To Ship:
- Yes
$76.99Qty in Cart: 0Price:$76.99Subtotal: -
20 Inch Chrome Texas Rolled End Bumper, 10 Gauge For International 9900I, 9900IX
VALLEY CHROME PLATING
$845.99 - $951.99Elevate your rig with the 20-inch chrome Texas rolled end bumper. Manufactured from 10-gauge (1/8-inch thick) chrome-plated steel, this bumper delivers dependable strength while maintaining a...PPR_203041- SKU:
- PPR_203041
- Truck Class:
- Heavy Duty
- Light Options:
- Without Lights
- Height Options:
- 20 Inch
- Location:
- Made In USA
- Style Options:
- Texas Rolled End
- Material Options:
- Steel
- Make:
- International
- Finish Options:
- Chrome-Plated
- Type Options:
- Standard Mount
- Size Options:
- 10 Gauge
- Product Type:
- Bumpers
$845.99 - $951.99Qty in Cart: 0Price:$845.99 - $951.99Subtotal: -
15 Inch Octagonal 56 Diode Amber/Clear LED Mini Light Bar W/ 10 Adjustable Flash Patterns
BUYERS PRODUCTS
$251.99Octagonal Amber LED Clear Lens LED Mini Light Bar W/ 10 Flash Patterns* High Quality Mini Light Bar* Light Color Amber And Clear* Plastic Housing* Lens Made Of Polycarbonate* Dimension - 15 Inch...09-160900041- SKU:
- 09-160900041
- Truck Class:
- Universal
- Color:
- Amber
- Material Options:
- Plastic/Poly
- Make:
- Universal Items
- Length Options:
- 15 Inch
- Product Type:
- Lighting
$251.99Qty in Cart: 0Price:$251.99Subtotal: -
12.5 Inch Stainless Drop Visor W/ 10 Amber M1 LEDs For International LT, LoneStar, ProStar W/ Hi Rise Pro Sleeper
ROADWORKS
$978.9912.5 Inch Stainless Drop Visor W/ 10 Amber M1 LEDs Fits International* High Quality Drop Visor* Made Of Stainless Steel * 12.5 Inch* For Sleeper Trucks Only* With 8 Amber/Clear M1 Lights * Sold...07-090000041- SKU:
- 07-090000041
- 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
$978.99Qty in Cart: 0Price:$978.99Subtotal: -
10 Micron Fuel-Water Separator Filter
OPP - ORIGINAL PARTS PROGRAM
$30.2410 Micron Fuel-Water Separator Filter* High Quality Fuel Water Separator Filter* Filter* Sold Individually * Warranty On Fuel Water Separator Filter Against Defects In Workmanship & Material From...FS19764FLG- SKU:
- FS19764FLG
- Truck Class:
- Heavy Duty
- Make:
- Western Star
- Product Type:
- Engine Parts
- Ready To Ship:
- Yes
$30.24Qty in Cart: 0Price:$30.24Subtotal: -
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: -
On SaleFREE SHIPPING OVER $249Limited Quantity Available
Rectangular Rubber Grommet Flush Mount 10 Piece Pack
UNITED PACIFIC
Now: $7.80Was: $19.9610 Pack Flush Mount Rectangular Rubber Grommet* High Quality Grommet* Made Of PVC Rubber* For Rectangular Lights (Lights Not Included)* Compatible With Any 33/35 Series Light* Black* Flush Mount*...09-160200410- SKU:
- 09-160200410
- Light Options:
- Without Lights
- Shape Options:
- Rectangular
- Type Options:
- Flush Mount
- Color:
- Black
- Product Type:
- Lighting
- Material Options:
- Rubber
- Make:
- Universal Items
- Ready To Ship:
- Yes
Now: $7.80Was: $19.96Qty in Cart: 0Price:Now: $7.80Was: $19.96Subtotal: -
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
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
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
$38.75Qty in Cart: 0Price:$38.75Subtotal: -
FREE SHIPPING OVER $249
10 LED Rectangular Glo-Light Clearance/ Marker - Red LED/Clear Lens
UNITED PACIFIC
$10.4310 LED Rectangular Glo-Light Clearance/ Marker* High Quality Glo-Light* Polycarbonate Lens* 10 LEDs* Clearance/Marker* Rectangle* Red LED/Clear Lens* Sonically Sealed To Housing To Prevent Moisture...09-160100415- SKU:
- 09-160100415
- Truck Class:
- Universal
- Color:
- Red
- Style Options:
- Glo Light
- Shape Options:
- Rectangular
- Material Options:
- Plastic/Poly
- Make:
- Universal Items
- Product Type:
- Lighting
$10.43Qty in Cart: 0Price:$10.43Subtotal: -
FREE SHIPPING OVER $249
10 Inch Bi-Level Scrub Brush For Use With Aluminum Wash Pole
UNITED PACIFIC
$13.09Bi-Level Scrub Brush For Aluminum Wash Pole* High Quality Scrub Brush* 10 Inch Length* With Aluminum Wash Pole* Sold Individually* Warranty On Scrub Brush Against Defects In Workmanship & Material...09-170410- SKU:
- 09-170410
- Length Options:
- 10 Inch
- Truck Class:
- Universal
- Make:
- Universal Items
- Material Options:
- Aluminum
- Product Type:
- Polishing
- Ready To Ship:
- Yes
$13.09Qty in Cart: 0Price:$13.09Subtotal: -
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: