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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
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
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
Haul of Fame: Equipment Express's "Doc Holliday” A 2007 Peterbilt Legacy 379 Built to Legend(Post)Why "Doc Holliday" Earns a Spot in the Haul of Fame Every now and then, a truck rolls through that stops you dead in your tracks. "Doc Holliday," the custom 2007 Peterbilt Legacy 379 built by Equipmen
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
Blatant Signs Your Turbocharger is Failing (And When to Replace it) (Post)If your semi truck turbocharger is failing, you'll encounter a few common signs. In this post, we'll cover what those are, and similar symptoms that aren't actually the turbo, but a related part. Sig
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
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
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MV3 Dash Air Valve - Replaces K031483, K031484, K031485
OPP - ORIGINAL PARTS PROGRAM
$443.99MV-3 Type Push - Pull Tractor-Trailer Dash Air Control Brake Valve - 3/8 Inch Ports, 1/4 Inch -20 Mounting HolesThe MV3 Air Control Valve is a key component for your truck's air parking brake system...K031485- SKU:
- K031485
- Truck Class:
- Heavy Duty
- Color:
- Black
- Material Options:
- Plastic/Poly
- Product Type:
- Interior
$443.99Qty in Cart: 0Price:$443.99Subtotal: -
On SaleLimited Quantity Available
Monroe 65 Series Shock Absorber Replaces 65148, 65139 For Freightliner
OPP - ORIGINAL PARTS PROGRAM
Now: $33.17Was: $71.99Monroe Steer Shock Fits Freightliner* High Quality Shock* Single-Lip, Low Friction Oil Seal* Nitrogen Gas Charged* Compressed Length: 14.625* Extended Length: 22.75* 2 3/8 Inch Reserve Tube On Most...65148M- SKU:
- 65148M
- Truck Class:
- Heavy Duty
- Length Options:
- 14 Inch
- Size Options:
- 8 Stroke
- Make:
- Universal Items
- Product Type:
- Frame & Chassis
- Ready To Ship:
- Yes
Now: $33.17Was: $71.99Qty in Cart: 0Price:Now: $33.17Was: $71.99Subtotal: -
Linkage Kit 8.7 Inch C-C Hendrickson Style Replaces 59428004 For International, Mack & Volvo
AUTOMANN USA
$20.368.7 Inch C To C Linkage Kit* High Quality Linkage Kit* 8.7 Inch C To C * Made In USA* Sold Individually * Warranty On Linkage Kits Against Defects In Workmanship & Material From Date Of Purchase***...29-05090148- SKU:
- 29-05090148
- Material Options:
- Steel
- Truck Class:
- Heavy Duty
- Make:
- Volvo
- Make:
- Mack
- Make:
- International
- Product Type:
- Frame & Chassis
$20.36Qty in Cart: 0Price:$20.36Subtotal: -
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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Informer BL2 W/ Display Backlighting, 12VDC
TELTEK
$114.99Digital Informer BL2 W/ Display Backlighting* High Quality Informer BL2* Includes 10Ft Plug In Sensor Cable* 3 Inch X 1-3/4 Inch X 1-1/4 Inch* Back Lighting For Night Viewing* 12V DC* -50 F To 150 F...09-1501489- SKU:
- 09-1501489
- Truck Class:
- Universal
- Location:
- Made In USA
- Length Options:
- 3 Inch
- Style Options:
- Digital
- Make:
- Universal Items
- Product Type:
- Interior
$114.99Qty in Cart: 0Price:$114.99Subtotal: -
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Informer 2 Glow High Accuracy Digital Thermometer, 3 X 1 3/4 X 1 1/4 INCH
TELTEK
$106.99Informer 2 Glow High Accuracy Digital Thermometer* High Quality Informer 2 Glow* 3 Inch X 1-3/4 Inch X 1-1/4 Inch* Range -50 F To 150F Accuracy 1.5 F (-45 C To 65 C)* Temperature Sensor Is Water...09-1501487- SKU:
- 09-1501487
- Location:
- Made In USA
- Truck Class:
- Universal
- Style Options:
- Digital
- Make:
- Universal Items
- Product Type:
- Interior
$106.99Qty in Cart: 0Price:$106.99Subtotal: -
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Informer 1 Glow High Accuracy Digital Thermometer, 3 X 1 3/4 X 1 1/4 INCH
TELTEK
$94.99Informer 1 Glow High Accuracy Digital Thermometer* High Quality Informer 1 Glow* 3 Inch X 1-3/4 Inch X 1-1/4 Inch* -50 F To 150 F (-45 C To 65 C)* Temperature Sensor Is Water Proof* Back Light Is On...09-1501488- SKU:
- 09-1501488
- Length Options:
- 3 Inch
- Truck Class:
- Universal
- Location:
- Made In USA
- Style Options:
- Digital
- Shape Options:
- Rectangular
- Make:
- Universal Items
- Product Type:
- Interior
$94.99Qty in Cart: 0Price:$94.99Subtotal: -
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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: -
Electric Diesel Fuel Heater Kit For FASS System Titanium Series
FASS
$207.99Titanium Series Optional Electric Diesel Fuel Heater KitUpgrade your FASS System for extreme cold with the Titanium Series Electric Heater Kits. These heaters prevent gelling, aid cold weather...09-07030148- SKU:
- 09-07030148
- Truck Class:
- Universal
- Location:
- Made In USA
- Make:
- Universal Items
- Product Type:
- Engine Parts
$207.99Qty in Cart: 0Price:$207.99Subtotal: -
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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: -
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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: -
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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: -
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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
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: -
1-Piece Stainless Steel Diesel Particulate Filter Replaces 2871459, 2871482 For Cummins ISL, ISC, PX8 Engines
GLOBAL EMISSIONS
$1,740.991-Piece Stainless Steel Diesel Particulate Filter Fits Cummins ISL, ISC & PX8 Engines* High Quality Diesel Particulate Filter* Made Of Stainless Steel * Exclusive 1-Piece Canister Design For...29-080600032- SKU:
- 29-080600032
- Truck Class:
- Heavy Duty
- Style Options:
- Cummins
- Material Options:
- Stainless Steel
- Make:
- Universal Items
- Product Type:
- Exhaust
$1,740.99Qty in Cart: 0Price:$1,740.99Subtotal: -
Stainless Steel Day Cab Panels W/ 6 P1 Amber/Amber LEDs For Kenworth W900
PHOENIX DESIGN
$240.99Day Cab Panels W/ 6 P1 Amber LED Amber Lens Lights Fits Kenworth W900* High Quality Cab Panel* Made Of 304 Stainless Steel* 3 P1 Lights Per Side* Amber LED/Amber Lens* 14 Inch Spacing * Driver Side...02-091200148- SKU:
- 02-091200148
- Light Options:
- With Lights
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Material Options:
- Stainless Steel
- Make:
- Kenworth
- Finish Options:
- Paintable
- Length Options:
- 47 Inch
- Product Type:
- Exterior
- Ready To Ship:
- Yes
$240.99Qty in Cart: 0Price:$240.99Subtotal: -
BESTfit 5 Inch 47 Degree Aluminized Intermediate Exhaust Pipe For International 9200, 9200I, 9400 & 9400I
BESTFIT TRUCK PARTS
$296.99BESTfit 5 Inch 47 Degree Aluminized Intermediate Exhaust Pipe* High Quality Intermediate Pipe* 47 Degree Bend* 5 Inch O.D.* 5 Inch O.D. Outlet* Aluminized Pipe* Sold Individually* Warranty On...07-08148300- SKU:
- 07-08148300
- Truck Class:
- Heavy Duty
- Diameter Options:
- 5 Inch
- Material Options:
- Aluminized Steel
- Make:
- International
- Style Options:
- Elbow
- Product Type:
- Exhaust
$296.99Qty in Cart: 0Price:$296.99Subtotal: -
FREE SHIPPING OVER $249
21 LED 4 Inch Flange Mount Glo-Light - Stop. Turn And Tail - Red LED / Red Lens
UNITED PACIFIC
$22.47Red LED 4 Inch Flange Mount Glo-Light- Stop. Turn And Tail* High Quality Glo-Light* Polycarbonate Lens* 4 Inch* Flange Mount Design * No Grommet Needed* 21 LEDs* Stop/Turn/Tail Function* Red LED/Red...09-16090148- SKU:
- 09-16090148
- Truck Class:
- Universal
- Color:
- Red
- Diameter Options:
- 4 Inch
- Style Options:
- Glo Light
- Shape Options:
- Round
- Material Options:
- Plastic/Poly
- Make:
- Universal Items
- Product Type:
- Lighting
$22.47Qty in Cart: 0Price:$22.47Subtotal: