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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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FS1040 Fuel Filter Cummins ISX
OPP - ORIGINAL PARTS PROGRAM
$59.99FS1040 Fuel Filter Cummins ISX* High Quality Fuel Filter* Sold Individually* Warranty On Fuel Filter Against Defects In Workmanship & Material From Date Of Purchase*** High Quality Aftermarket...FS1040FLG- SKU:
- FS1040FLG
- Truck Class:
- Universal
- Make:
- Universal Items
- Product Type:
- Engine Parts
- Ready To Ship:
- Yes
$59.99Qty in Cart: 0Price:$59.99Subtotal: -
20 Inch Chrome American Road Runner Mitered Corner Bumper With Tow Holes For Kenworth W900B, W900L
VALLEY CHROME PLATING
$1,314.99Valley Chrome American Roadrunner Bumper W/ 45 Degree Mitered Corners & Tow Holes* High Quality Bumper* Made Of Chrome-Plated Steel* 20 Inch Height* Has Cutouts For: - Mounting Holes - Tow Holes*...FE0010104- SKU:
- FE0010104
- Finish Options:
- Chrome-Plated
- Material Options:
- Steel
- Truck Class:
- Heavy Duty
- Height Options:
- 20 Inch
- Product Type:
- Bumpers
- Light Options:
- Without Lights
- Size Options:
- 10 Gauge
- Location:
- Made In USA
- Style Options:
- American Eagle Mitered End
- Make:
- Kenworth
$1,314.99Qty in Cart: 0Price:$1,314.99Subtotal: -
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: -
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BESTfit 0.063 Inch Thick X 4.375 Inch C To C Torque Rod Shim For Kenworth AG380 Suspension
BESTFIT TRUCK PARTS
$7.04BESTfit 0.063 Inch Thick Torque Rod Shim Replaces OF47457, 49689, 8020329Keep your Kenworth AG380 suspension performing at its best with the BESTfit 0.063 Inch Thick X 4.375 Inch C to C Torque Rod...02-051046K01- SKU:
- 02-051046K01
- Truck Class:
- Heavy Duty
- Length Options:
- 4 Inch
- Make:
- Kenworth
- Product Type:
- Frame & Chassis
- Ready To Ship:
- Yes
$7.04Qty in Cart: 0Price:$7.04Subtotal: -
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BESTfit 1/32 Inch Thick X 5.688 Inch C To C Torque Rod Shim For Kenworth AG380 Suspension
BESTFIT TRUCK PARTS
$9.35BESTfit 1/32 Inch Thick Torque Rod Shim Fits Kenworth AG380 - Replaces 03-08782-001, 3624479C1 & 66299001Maintain optimal torque rod alignment and suspension integrity on your Kenworth AG380 with the...02-051048K01- SKU:
- 02-051048K01
- Length Options:
- 5 Inch
- Truck Class:
- Heavy Duty
- Make:
- Kenworth
- Product Type:
- Frame & Chassis
$9.35Qty in Cart: 0Price:$9.35Subtotal: -
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BESTfit 1/8 Inch Thick X 5.688 Inch C To C Torque Rod Shim For Kenworth AG380 Suspension
BESTFIT TRUCK PARTS
$9.35BESTfit 1/8 Inch Thick Torque Rod Shim Fits Kenworth AG380 - Replaces 3624481C1 & 66299003The BESTfit 1/8 Inch Thick X 5.688 Inch C to C Torque Rod Shim ensures Kenworth AG380 owners maintain...02-051049K01- SKU:
- 02-051049K01
- Length Options:
- 5 Inch
- Truck Class:
- Heavy Duty
- Make:
- Kenworth
- Product Type:
- Frame & Chassis
$9.35Qty in Cart: 0Price:$9.35Subtotal: -
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BESTfit 1/8 Inch Thick X 5.688 C-C Torque Rod Shim For International New Corporate Air & IROS Suspension
BESTFIT TRUCK PARTS
$9.35BESTfit Torque Rod Shim - Replaces 3624481C1, 3549154C1, 65640003 & 66299003Keep your International New Corporate Air and IROS suspension operating at peak efficiency with the BESTfit 1/8 Inch Thick...07-051049K01- SKU:
- 07-051049K01
- Truck Class:
- Heavy Duty
- Length Options:
- 5 Inch
- Make:
- International
- Product Type:
- Frame & Chassis
$9.35Qty in Cart: 0Price:$9.35Subtotal: -
The Brute 104 Inch Tandem Axle Fenders - Pair
MINIMIZER
$1,103.99 - $3,831.99Take your truck to the next level with The Brute 104-inch tandem axle fenders, designed for super single tire setups. Constructed from high-density polyethylene, these full fenders are built to...PPR_202895- SKU:
- PPR_202895
- Make:
- Universal Items
- Truck Class:
- Heavy Duty
- Length Options:
- 104 Inch
- Location:
- Made In USA
- Material Options:
- Plastic/Poly
- Type Options:
- Full
- Height Options:
- 23 Inch
- Light Options:
- Without Lights
- Finish Options:
- Paintable
- Material Options:
- Stainless Steel
- Product Type:
- Rear Fenders
$1,103.99 - $3,831.99Qty in Cart: 0Price:$1,103.99 - $3,831.99Subtotal: -
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BESTfit 1/32 Inch Thick X 5.688 C-C Torque Rod Shim For International New Corporate Air, IROS Suspension
BESTFIT TRUCK PARTS
$9.35BESTfit 0.125 Inch Thick Torque Rod Shim - Replaces 3624481C1, 3549154C1, 65640003 & 66299003Ensure precise torque rod alignment on your International New Corporate Air and IROS suspension with the...07-051048K01- SKU:
- 07-051048K01
- Length Options:
- 5 Inch
- Truck Class:
- Heavy Duty
- Make:
- International
- Product Type:
- Frame & Chassis
$9.35Qty in Cart: 0Price:$9.35Subtotal: -
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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: -
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FF2203 Fleetguard Fuel Filter Cummins ISX
OPP - ORIGINAL PARTS PROGRAM
$40.85FF2203 Fleetguard Fuel Filter Cummins ISX* High Quality Fuel Filter* Alternate Fuel/Water Separator With Drain FS1023* Replaces OEM # 4010476* Sold Individually* Warranty On Fuel Filters Against...FF2203FLG- SKU:
- FF2203FLG
- Truck Class:
- Heavy Duty
- Make:
- Universal Items
- Product Type:
- Engine Parts
- Ready To Ship:
- Yes
$40.85Qty in Cart: 0Price:$40.85Subtotal: -
BESTfit Steel Spring Hanger 3.93 Inch C To C For Peterbilt W/ Low Mount Air Leaf Replaces 01-46785M001 & 01-49563M001
BESTFIT TRUCK PARTS
$658.99Steel Spring Hanger 3.93 Inch C To C By BESTfit Replaces 01-46785M001 & 01-49563M001 Fits Peterbilt W/ Low Mount Air LeafThe BESTfit Steel Spring Hanger is a heavy-duty replacement part engineered to...01-051043- SKU:
- 01-051043
- Truck Class:
- Heavy Duty
- Material Options:
- Steel
- Make:
- Peterbilt
- Product Type:
- Frame & Chassis
- Ready To Ship:
- Yes
$658.99Qty in Cart: 0Price:$658.99Subtotal: -
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BESTfit 23.75 Inch C-C Torque Rod Replaces C65-6000-001 & C65-6011-001 For Peterbilt & Kenworth Flex Air
BESTFIT TRUCK PARTS
$233.99BESTfit Torque Rod Fits Peterbilt & Kenworth Flex Air SuspensionThe BESTfit 23.75 Inch C-C Torque Rod is a high-quality replacement designed to fit OEM parts C65-6000-001 and C65-6011-001, providing...01-051044K01- SKU:
- 01-051044K01
- Truck Class:
- Heavy Duty
- Length Options:
- 23 Inch
- Position:
- Front
- Make:
- Peterbilt
- Product Type:
- Frame & Chassis
- Ready To Ship:
- Yes
$233.99Qty in Cart: 0Price:$233.99Subtotal: -
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BESTfit 24.625 Inch C-C Torque Rod Replaces C65-6000-002 & C65-6011-002 For Peterbilt & Kenworth Flex Air
BESTFIT TRUCK PARTS
$233.99BESTfit Torque Rod Fits Peterbilt & Kenworth Flex Air SuspensionThe BESTfit 24.625 Inch C-C Torque Rod is a durable replacement designed to fit OEM parts C65-6000-002 and C65-6011-002, providing...01-051045K01- SKU:
- 01-051045K01
- Position:
- Rear
- Length Options:
- 24 Inch
- Truck Class:
- Heavy Duty
- Make:
- Peterbilt
- Product Type:
- Frame & Chassis
- Ready To Ship:
- Yes
$233.99Qty in Cart: 0Price:$233.99Subtotal: -
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BESTfit Single Leaf C Spring Replaces C81-6001 & C81-6001A For Kenworth AG380 Suspension
BESTFIT TRUCK PARTS
$615.99BESTfit Single Leaf C Spring Fits Kenworth AG380 SuspensionThe BESTfit Single Leaf C Spring provides Kenworth AG380 owners with precision-engineered suspension support. It features a 7-1/4 inch arch,...02-051040K01- SKU:
- 02-051040K01
- Width Options:
- 4 Inch
- Truck Class:
- Heavy Duty
- Make:
- Kenworth
- Product Type:
- Frame & Chassis
- Ready To Ship:
- Yes
$615.99Qty in Cart: 0Price:$615.99Subtotal: -
On SaleLimited Quantity Available
Front 3 Leaf Parabolic Spring 4 Inch Wide - HK1073-104 For Kenworth
AUTOMANN USA
Now: $257.32Was: $508.99Leaf Parabolic Front Spring - 3 Leaves* High Quality Parabolic Spring* 3 Leaf Stack* 4 Inches Wide* 5.000 Inch Arch* 32.000 Inch Inch Short End Of Spring* 32.000 Inch Long End Of Spring* Includes 1...02-050907- SKU:
- 02-050907
- Truck Class:
- Heavy Duty
- Width Options:
- 4 Inch
- Length Options:
- 64 Inch
- Make:
- Kenworth
- Product Type:
- Frame & Chassis
- Ready To Ship:
- Yes
Now: $257.32Was: $508.99Qty in Cart: 0Price:Now: $257.32Was: $508.99Subtotal: -
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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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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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BESTfit Single Leaf C Spring, Replaces C81-6001, C81-6001A For Peterbilt Flex Air Suspension
BESTFIT TRUCK PARTS
$615.99Single Leaf C Spring By BESTfit Replaces C81-6001, C81-6001A Fits Peterbilt Flex Air SuspensionThe BESTfit Single Leaf C Spring Hanger is a durable and precise replacement designed to fit Peterbilt...01-051040K01- SKU:
- 01-051040K01
- Truck Class:
- Heavy Duty
- Width Options:
- 4 Inch
- Make:
- Peterbilt
- Product Type:
- Frame & Chassis
- Ready To Ship:
- Yes
$615.99Qty in Cart: 0Price:$615.99Subtotal: -
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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: