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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
How to Choose the Right W990 Drop Visor(Post)The best Kenworth W990 drop visor depends on your design preference, mounting configuration, and windshield type or cab style (curved or flat). Buying a Custom W990 Truck Visor Online? If you're brow
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.
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
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
T880 Visor Ultimate Buyer's Guide(Post)There are countless Kenworth T880 visor options to choose from depending on the theme and style you’re going for. Here's a quick buyer's guide for Kenworth T880 aftermarket visors. Before you buy, con
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
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
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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1-Piece Stainless Steel Diesel Particulate Filter Replaces 2888249NX, 4969542NX, 4965317NX For Cummins ISX Engine
GLOBAL EMISSIONS
$2,264.991-Piece Stainless Steel Diesel Particulate Filter Fits Cummins ISX Engine* High Quality Diesel Particulate Filter* Made Of Stainless Steel * Exclusive 1-Piece Canister Design For Durability* OEM...29-080600054- SKU:
- 29-080600054
- Truck Class:
- Heavy Duty
- Style Options:
- Cummins
- Material Options:
- Stainless Steel
- Make:
- Universal Items
- Product Type:
- Exhaust
$2,264.99Qty in Cart: 0Price:$2,264.99Subtotal: -
BESTfit CAT Diesel Particulate Filter For Caterpillar C13/C15 Engine Replaces 10R6089, 46003, CQ1704C
BESTFIT TRUCK PARTS
$3,767.99CAT Diesel Particulate Filter By BESTfit Replaces 10R6089, 46003, CQ1704C Fits Caterpillar C13/C15 EngineMaintain peak performance and emissions compliance with the BESTfit CAT DPF for Caterpillar...29-08090054- SKU:
- 29-08090054
- Style Options:
- Caterpillar
- Product Type:
- Exhaust
- Make:
- Universal Items
$3,767.99Qty in Cart: 0Price:$3,767.99Subtotal: -
FREE SHIPPING OVER $249
TPHD Control Valve Air Suspension Normally Open
TURNPIKE TRUCK TRIM
$67.9912V Control Valve Air By TPHDMaintain consistent air suspension performance with the TPHD Control Valve Air Suspension Normally Open. With a 3-way configuration, 1/4-inch NPT fitting, and 12-volt...90054075GTA- SKU:
- 90054075GTA
- Truck Class:
- Universal
- Make:
- Universal Items
- Product Type:
- Frame & Chassis
$67.99Qty in Cart: 0Price:$67.99Subtotal: -
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: -
Trunnion Bushing 4 ID X 4.25 OD X 4.28 Inch OAL For Mack
AFTERMARKET
$83.99Mack Trunnion BushingReplace worn suspension components with confidence using this engineered Trunnion Bushing for Mack trucks. With 4.00-inch inner diameter, 4.25-inch outer diameter, and 4.28-inch...11-05100054- SKU:
- 11-05100054
- Material Options:
- Brass
- Truck Class:
- Heavy Duty
- Make:
- Mack
- Product Type:
- Frame & Chassis
$83.99Qty in Cart: 0Price:$83.99Subtotal: -
FREE SHIPPING OVER $249
Chrome Plastic Light Bezel 2 Inch W/ Visor, Twist On
TRUX ACCESSORIES
$3.69Twist On 2 Inch Chrome Plastic Light Bezel W/ VisorNeed something extra to accent your lights? This seamless, 2-inch bezel from 4 State Trucks with lock-on technology is the perfect addition to your...09-1605054- SKU:
- 09-1605054
- Truck Class:
- Universal
- Diameter Options:
- 2 Inch
- Shape Options:
- Round
- Material Options:
- Plastic/Poly
- Make:
- Universal Items
- Finish Options:
- Chrome-Plated
- Product Type:
- Lighting
- Ready To Ship:
- Yes
- Style Options:
- Twist On
$3.69Qty in Cart: 0Price:$3.69Subtotal: -
FASS Signature Series Fuel System- 250 F, 220 GPH, 55 PSI For Ford F250/F350 Super Duty Powerstroke 6.0L/7.3L
FASS
$855.99220 GPH Signature Series Fuel System For Powerstroke 6.0L/7.3L Engine 1999-2007 Fits Ford F250/F350 Super Duty Powerstroke 6.0L/7.3LImprove fuel system performance and reliability with the FASS...05-07030054- SKU:
- 05-07030054
- Type Options:
- Bolt Mount
- Position:
- Kit Full
- Product Type:
- Engine Parts
- Style Options:
- Powerstroke
- Make:
- Ford
$855.99Qty in Cart: 0Price:$855.99Subtotal: -
FASS Signature Series Fuel System- 250F, 220 GPH, 70-75 PSI For GMC/Chevrolet 2500/3500HD Duramax 6.6L
FASS
$907.99220 GPH Signature Series Fuel SystemBoost fuel system performance and injector protection on your GMC/Chevrolet 2500/3500HD Duramax 6.6L with the FASS Signature Series Fuel System (220 GPH), built...12-07030054- SKU:
- 12-07030054
- Style Options:
- Duramax
- Product Type:
- Engine Parts
- Position:
- Kit Full
- Make:
- Chevrolet
- Make:
- GMC
$907.99Qty in Cart: 0Price:$907.99Subtotal: -
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: -
Stainless Steel Diesel Particulate Filter Replaces 261-2318, 220-6054, 264-1556 For Caterpillar C9 Engine
GLOBAL EMISSIONS
$2,589.99Stainless Steel Diesel Particulate Filter Fits Caterpillar C9 Engine* High Quality Diesel Particulate Filter* Made Of Stainless Steel * OEM Quality Clamps And Gaskets Included* Sold Individually *...29-080600040- SKU:
- 29-080600040
- Truck Class:
- Heavy Duty
- Material Options:
- Stainless Steel
- Make:
- Universal Items
- Product Type:
- Exhaust
$2,589.99Qty in Cart: 0Price:$2,589.99Subtotal: -
BESTfit 14.3125 X 13.5 Inch DPF Gasket For Volvo W/ Cummins Engines
BESTFIT TRUCK PARTS
$18.5914.3125 X 13.5 Inch DPF Gasket By BESTfitKeep your diesel particulate filter system secure and efficient with the BESTfit 14.3125 x 13.5 Inch DPF Gasket for Volvo trucks powered by Cummins engines...GR-GRDPFG-1054-10- SKU:
- GR-GRDPFG-1054-10
- Style Options:
- Cummins
- Product Type:
- Exhaust
- Make:
- Volvo
$18.59Qty in Cart: 0Price:$18.59Subtotal: -
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: -
1-Piece Stainless Steel Diesel Particulate Filter Replaces 21905492, 85001353 For Mack/Volvo MP7/MP8 Engines
GLOBAL EMISSIONS
$2,070.991-Piece Stainless Steel Diesel Particulate Filter Fits Mack/Volvo MP7 & MP8 Engines* High Quality Diesel Particulate Filter* Made Of Stainless Steel * Exclusive 1-Piece Canister Design For...29-080600031- SKU:
- 29-080600031
- Truck Class:
- Heavy Duty
- Material Options:
- Stainless Steel
- Make:
- Volvo
- Make:
- Mack
- Product Type:
- Exhaust
$2,070.99Qty in Cart: 0Price:$2,070.99Subtotal: -
FREE SHIPPING OVER $249
BESTfit 4 Inch Non-Locking Lever Style Fuel Cap For Peterbilt
BESTFIT TRUCK PARTS
$75.99 - $689.99Choose Option(s) to see description.Fitment* Fits Peterbilt 330 1995 thru 2005* Fits Peterbilt 335 2005 thru 2010* Fits Peterbilt 337 2011 thru 2022* Fits Peterbilt 352 1972 thru 1980* Fits Peterbilt...PPR_300546- SKU:
- PPR_300546
- Truck Class:
- Heavy Duty
- Product Type:
- Fuel Tanks
- Material Options:
- Aluminum
- Diameter Options:
- 4 Inch
- Style Options:
- Non Vented
- Make:
- Peterbilt
- Ready To Ship:
- Yes
$75.99 - $689.99Qty in Cart: 0Price:$75.99 - $689.99Subtotal: -
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 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
CSM Stainless Steel Fuel Tank Strap Kit For Peterbilt W/ 26 Inch Diameter Tanks
CHROME SHOP MAFIA
$411.99 - $679.99Secure and protect your Peterbilt's 26-inch diameter fuel tank with the CSM Stainless Steel Fuel Tank Strap Kit by Chrome Shop Mafia. Available in two sizes-8-inch and 4-inch-these high-quality strap...PPR_300542- SKU:
- PPR_300542
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Material Options:
- Stainless Steel
- Width Options:
- 4 Inch
- Finish Options:
- Polished
- Position:
- Kit Full
- Product Type:
- Fuel Tanks
- Width Options:
- 8 Inch
- Make:
- Peterbilt
- Ready To Ship:
- Yes
- Diameter Options:
- 26 Inch
$411.99 - $679.99Qty in Cart: 0Price:$411.99 - $679.99Subtotal: -
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: