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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
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
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
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
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
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
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
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
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
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
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Chrome Classic PB Style Headlight W/ H4 Halogen Bulb, 34 Amber LED Position Light, Amber/Clear Turn Signal Light For Peterbilt, Freightliner, International & Mack
UNITED PACIFIC
$195.99Chrome Classic H4 Halogen Headlight W/ 34 Amber LED Position Light, Amber/Clear Turn Signal Light* High Quality Headlight * Chrome Plated Headlight Housing And Bezel* Crystal Clear Lens LED...29-160600109- SKU:
- 29-160600109
- Truck Class:
- Heavy Duty
- Shape Options:
- Round
- Make:
- GMC
- Make:
- Peterbilt
- Make:
- Freightliner
- Make:
- Mack
- Make:
- International
- Make:
- Sterling
- Make:
- Kenworth
- Finish Options:
- Chrome-Plated
- Material Options:
- Steel
- Product Type:
- Lighting
$195.99Qty in Cart: 0Price:$195.99Subtotal: -
BESTfit 6 - 4 Inch OD Exhaust Tee Replaces 3530109C1 For International 9200, 9400, 9900
BESTFIT TRUCK PARTS
$344.99BESTfit Exhaust Tee 6 Inch O.D. X 4 Inch O.D. Fits International 9200/9400/9900* High Quality Aluminum Exhaust Tee* 6 Inch O.D. Inlet* 2 - 4 Inch O.D. Outlets* Sold Individually* Warranty On Exhaust...07-080601090- SKU:
- 07-080601090
- Truck Class:
- Heavy Duty
- Diameter Options:
- 6 Inch
- Material Options:
- Aluminum
- Make:
- International
- Style Options:
- T-Pipe
- Product Type:
- Exhaust
$344.99Qty in Cart: 0Price:$344.99Subtotal: -
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: -
FREE SHIPPING OVER $249
Cartridge Kit For ADSP/ ADIS Wabco Air Dryers
AUTOMANN USA
$31.8712V Cartridge Kit Fits ADSP/ ADIS Wabco Air DryersOptimize your ADSP/ADIS Wabco air dryer with this high-quality Cartridge Kit, designed to replace OEM numbers 109994, 5008414, 1699595C1, 745109994,...109994- SKU:
- 109994
- Truck Class:
- Heavy Duty
- Make:
- Universal Items
- Product Type:
- Engine Parts
$31.87Qty in Cart: 0Price:$31.87Subtotal: -
Brass Square Head Plug 1/2 Inch
TRAMEC SLOAN
$5.78.5 Inch Square Head Solid Plug Brass Fitting - Threaded* High Quality Head Plug* Brass* 1/2 Inch * Square* Sold Individually* Warranty On Head Plugs Against Defects In Workmanship & Material From...BP1098- SKU:
- BP1098
- Truck Class:
- Heavy Duty
- Material Options:
- Brass
- Diameter Options:
- 1/2 Inch
- Ready To Ship:
- Yes
- Make:
- Universal Items
- Product Type:
- Air, Electrical, & Safety
$5.78Qty in Cart: 0Price:$5.78Subtotal: -
Air Spring Rolling Lobe Includes Top Plate Brackets For Hendrickson Suspension
AFTERMARKET
$291.99Air Spring Rolling Lobe Includes Top Plate Brackets With Plastic Base* High Quality Air Spring* Rolling Lobe Type* 5900 Load At 80 PSI* 7500 Load At 100 PSI* 57 CPM Natural Frequency* Plastic Bottom...29-05100109- SKU:
- 29-05100109
- Style Options:
- Rolling Lobe
- Product Type:
- Frame & Chassis
- Diameter Options:
- 9 Inch
- Material Options:
- Plastic/Poly
- Height Options:
- 12 1/2 Inch
- Make:
- Universal Items
$291.99Qty in Cart: 0Price:$291.99Subtotal: -
7H15 Direct Short Body AC Compressor W/ 126MM Clutch, 10 Grooves
AUTOMANN USA
$335.997H15 Direct Short Body AC Compressor W/ ClutchMaximize cooling efficiency in your truck with the 7H15 Direct Short Body AC Compressor, built for durability and precision. The 126MM clutch with 10 PV...09-070000109- SKU:
- 09-070000109
- Truck Class:
- Heavy Duty
- Make:
- Peterbilt
- Make:
- Kenworth
- Product Type:
- Engine Parts
$335.99Qty in Cart: 0Price:$335.99Subtotal: -
On SaleLimited Quantity Available
Merritt Cab Rack Light Bracket With 2 Rnd 4 Inch Light Holes
MERRITT
Now: $55.29Was: $78.99Cab Rack Dual Light Mounting Bracket By MerrittEnhance your truck's lighting setup with the Merritt Cab Rack Light Bracket featuring two round 4-inch light holes. This high-quality bracket is...00091096C- SKU:
- 00091096C
- Truck Class:
- Heavy Duty
- Make:
- Universal Items
- Light Options:
- Without Lights
- Ready To Ship:
- Yes
- Product Type:
- Cargo Control
Now: $55.29Was: $78.99Qty in Cart: 0Price:Now: $55.29Was: $78.99Subtotal: -
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: -
Saddle Assembly Replaces E10058, E-10058, 31017006, 31017-006, 31017109, 31017-109, 31017109L, 31017-109L, 3101719, 321021, 57143, R3010058 For Hendrickson Suspension
AFTERMARKET
$577.997.1875 Inch Saddle AssemblyWhen suspension reliability is essential, this Saddle Assembly provides durable support for Hendrickson 403 Series systems. Featuring a 7-3/16 inch height and spring pack...29-05100210- SKU:
- 29-05100210
- Product Type:
- Frame & Chassis
- Height Options:
- 7 Inch
- Make:
- Universal Items
$577.99Qty in Cart: 0Price:$577.99Subtotal: -
BESTfit Sanden Style Ear Mount AC Compressor W/ 8 Groove 119MM Pulley
BESTFIT TRUCK PARTS
$329.99BESTfit AC Compressor Sanden Style Ear Mount W/ 8 Groove 119MM PulleyThis high-quality A/C compressor features an ear mount and a Sanden-style design. It comes equipped with an 8-groove 119mm pulley...09-0700000109- SKU:
- 09-0700000109
- Truck Class:
- Heavy Duty
- Material Options:
- Aluminum
- Make:
- Universal Items
- Product Type:
- Engine Parts
- Ready To Ship:
- Yes
$329.99Qty in Cart: 0Price:$329.99Subtotal: -
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: -
59.25 Inch Cross Tube - 1-1/4 In OD, 1 In-16 Ends Replaces A3102B1978
AFTERMARKET
$189.9959.25 Inch C To C Cross Tube Replaces A3102B1978* High Quality Cross Tube* 1-1/4 Inch OD * 59-1/4 Inch Overall Length* 1.0 Inch-16 Ends* Made In USA* Sold Individually* Warranty On Cross Tubes...29-05090109- SKU:
- 29-05090109
- Length Options:
- 59 Inch
- Material Options:
- Steel
- Truck Class:
- Heavy Duty
- Make:
- Universal Items
- Product Type:
- Frame & Chassis
$189.99Qty in Cart: 0Price:$189.99Subtotal: -
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
Chrome AC Heater Slider For Peterbilt 359 (Pack Of 3)
UNITED PACIFIC
$7.81A/C and Heater Control Slide Knob Fits Peterbilt* High Quality Slide Knob* Made Of Chrome Plated Plastic* Sold In Packs Of 3* Warranty On Slide Knob Against Defects In Workmanship & Material From...01-1501094- SKU:
- 01-1501094
- Truck Class:
- Heavy Duty
- Material Options:
- Plastic/Poly
- Make:
- Peterbilt
- Finish Options:
- Chrome-Plated
- Product Type:
- Interior
- Ready To Ship:
- Yes
$7.81Qty in Cart: 0Price:$7.81Subtotal: -
682-C Headlight W/ 34 LED Position Dual Function Light, Top Mount
UNITED PACIFIC
$319.99Upgrade your truck with this 682-C style stainless steel headlight featuring a crystal-clear LED headlight and a 34-LED amber position light. Constructed with a 304 stainless steel housing and bezel,...PPR_204587- SKU:
- PPR_204587
- Truck Class:
- Heavy Duty
- Material Options:
- Stainless Steel
- Shape Options:
- Round
- Make:
- Kenworth
- Make:
- International
- Make:
- Sterling
- Make:
- GMC
- Make:
- Peterbilt
- Make:
- Freightliner
- Make:
- Mack
- Product Type:
- Lighting
$319.99Qty in Cart: 0Price:$319.99Subtotal: -
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
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: