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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
Haul of Fame: The Murder Pete Truck(Post)They call it the Murder Pete. Blacked-out, rugged, and raw, it’s a notorious big rig known for its “murdered out” style. Supported by the custom fab shop work of Chrome Shop Mafia (CMS) and supplied w
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
Semi-Truck Mattress Sizes: Fitment Chart & Buying Guide(Post)Looking for the right sized semi truck mattress? Every long-haul trucker should prioritize spending a sizeable portion of their budget on a quality mattress and driver's seat. That's where you spend
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
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BESTfit DT466E Flywheel l With 14 Inch Clutch Replaces 1821916C1, 1821915C91 For International
BESTFIT TRUCK PARTS
$304.99BESTfit Flywheel With 12 Bolt Holes* High Quality Flywheel* For International DT466E* Flat Design* For 14 Inch Clutch* Size SAE #2* 12 Bolt Holes For Mounting* 17 Inch O.D. * 138 Teeth Ring Gear...29-071821915C91- SKU:
- 29-071821915C91
- Truck Class:
- Heavy Duty
- Make:
- International
- Product Type:
- Engine Parts
- Diameter Options:
- 17 Inch
- Style Options:
- Flat
$304.99Qty in Cart: 0Price:$304.99Subtotal: -
FREE SHIPPING OVER $249
Coolant Reservoir Replaces 15651180, 15684451, 15688604 & 15995900 For GMC C Series & TopKick
DAYTON / DORMAN
$43.59Coolant Reservoir Fits GMC C Series & TopKick 1990-1998* High Quality Coolant Reservoir* Non-Pressurized * Premium Plastic* Includes Reservoir Cap* Direct Replacement* Sold Individually* Warranty On...12-070219- SKU:
- 12-070219
- Truck Class:
- Heavy Duty
- Make:
- Mack
- Product Type:
- Engine Parts
$43.59Qty in Cart: 0Price:$43.59Subtotal: -
FREE SHIPPING OVER $249
Blower Switch 12 Volt 20 Amp 5 Terminal 3 Position
AFTERMARKET
$10.42Universal Blower Switch* High Quality Bower Switch* 12 Volt * 20 Amp Rating* 3 Position - Knob Not Included* 5 Terminal Hook Up* For AC And Heater Fan Control* Sold Individually* Warranty On Bower...2199005- SKU:
- 2199005
- Truck Class:
- Heavy Duty
- Make:
- Universal Items
- Product Type:
- Engine Parts
$10.42Qty in Cart: 0Price:$10.42Subtotal: -
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
Universal Engine Cooling Fan Clutch Drive Solenoid Kit
VELVAC
$117.99Replacement Solenoid For Air FanThis universal kit replaces existing solenoids found on Kysor, Bendix, and Horton tan clutches. It includes a valve, wire harness with Weather-Pack sealed connectors,...032192- SKU:
- 032192
- Truck Class:
- Heavy Duty
- Make:
- Universal Items
- Product Type:
- Air, Electrical, & Safety
- Ready To Ship:
- Yes
$117.99Qty in Cart: 0Price:$117.99Subtotal: -
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: -
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
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: -
10 Pack 1157 Type Clear Bulb W/ Indexed Double Contact Bayonet Base
UNITED PACIFIC
$5.99Clear Bulb 1157 Type W/ Indexed Double Contact Bayonet Base 10 PackStock up on reliable replacement lighting with this 10 Pack of 1157 Type Clear Incandescent Bulbs. Featuring an indexed double...09-16000219- SKU:
- 09-16000219
- Product Type:
- Lighting
- Make:
- Universal Items
$5.99Qty in Cart: 0Price:$5.99Subtotal: -
45 Inch Stainless Steel Tool Box Full Slip Cover For Kenworth W900B & W900L
TWELVE GAUGE
$865.9912 Gauge Tool Box Full Slip Cover Fits Kenworth* High Quality Battery Box Slip Cover* Made Of Stainless Steel* Full Cover (Covers Steps)* Lid Only (No Frame)* 45 Inch Length* Non Slip Grip Not...02-0502219- SKU:
- 02-0502219
- Truck Class:
- Heavy Duty
- Length Options:
- 45 Inch
- Material Options:
- Stainless Steel
- Make:
- Kenworth
- Product Type:
- Frame & Chassis
$865.99Qty in Cart: 0Price:$865.99Subtotal: -
Belmor Vinyl Winter Front For International ProStar
BELMOR
$129.99Winter Front Fits InternationalIf you are looking for the perfect way to cover your grille during cold weather, 4 State Truck offers this high quality Winter Front. Constructed to withstand sub-zero...07-120622190- SKU:
- 07-120622190
- Truck Class:
- Heavy Duty
- Location:
- Made In USA
- Color:
- White
- Material Options:
- Vinyl
- Make:
- International
- Product Type:
- Exterior
$129.99Qty in Cart: 0Price:$129.99Subtotal: -
FREE SHIPPING
Minimizer Holland 5th Wheel Slick Plate 29 X 35.5 Inch
MINIMIZER
$336.99Minimizer Holland 5th Wheel Slick Plate Kit For FW8At 4 State Trucks, we offer this high-quality Minimizer poly 5th wheel slick plate kit. The is made with a non-stick polymer surface to eliminate...09-05110219- SKU:
- 09-05110219
- Truck Class:
- Heavy Duty
- Make:
- Universal Items
- Product Type:
- Frame & Chassis
$336.99Qty in Cart: 0Price:$336.99Subtotal: -
Belmor Aeroshield III Smoked Hood Protector For Volvo VNM & Volvo VNL Gen II
BELMOR
$327.99Aeroshield III Smoked Hood Protector Fits Volvo VNM & Volvo VNL Gen IIKeep your eyes focused safely on the road by greatly reducing the flying debris that reaches the windshield. By adding this...13-12219- SKU:
- 13-12219
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Material Options:
- Stainless Steel
- Make:
- Volvo
- Product Type:
- Hood Parts & Acc.
$327.99Qty in Cart: 0Price:$327.99Subtotal: -
Bi Metal King Pin Bushing 1.79 ID X 1.92 OD X 2.8 Inch OAL
AUTOMANN USA
$21.61Ball Indented & Grooved Long Type King Pin Bushing Replaces 45F1079, 88912095, E-4545, E4545, 1225-D-836, 1225D836, R210082, 5351079, Bk265* High Quality King Pin Bushing* Bi Metal* Dimensions: - 1...29-05091219- SKU:
- 29-05091219
- Truck Class:
- Heavy Duty
- Material Options:
- Steel
- Diameter Options:
- 1 1/2 Inch
- Make:
- Universal Items
- Product Type:
- Frame & Chassis
$21.61Qty in Cart: 0Price:$21.61Subtotal: -
Stainless Steel Panel Light Script Plate For Dashboard Control Knob - Stick On
GRAND GENERAL
$4.92Dash Knob Panel Lights Script Plate - Plate Only* High Quality Panel Light Script Plate* Stainless Steel* Sold Individually* Warranty On Panel Light Script Plates Against Defects In Workmanship &...09-1502197- SKU:
- 09-1502197
- Material Options:
- Stainless Steel
- Truck Class:
- Heavy Duty
- Product Type:
- Interior
- Make:
- Universal Items
$4.92Qty in Cart: 0Price:$4.92Subtotal: -
Stainless Steel Dimmer Script Plate For Dashboard Control Knob - Stick On
GRAND GENERAL
$4.92Dash Knob Dimmer Script Plate - Plate Only* High Quality Script Plate* Stainless Steel* With Dimmer Script* Sold Individually* Warranty On Script Plates Against Defects In Workmanship & Material From...09-1502199- SKU:
- 09-1502199
- Truck Class:
- Heavy Duty
- Product Type:
- Interior
- Material Options:
- Stainless Steel
- Make:
- Universal Items
$4.92Qty in Cart: 0Price:$4.92Subtotal: -
12.25 X 7.5 Inch Unlined Brake Shoe For Hendrickson HXS Double Web
AFTERMARKET
$90.99Bare Brake Shoe ReplacementThis rugged unlined brake shoe offers a 12.25 Inch length and 7.50 Inch width, making it a direct-fit for compatible heavy-duty drum brake assemblies. Without a...09-05170219- SKU:
- 09-05170219
- Product Type:
- Frame & Chassis
- Make:
- Universal Items
$90.99Qty in Cart: 0Price:$90.99Subtotal: -
VC 18 Inch Chrome Steel Texas Bumper W/ Rolled Hand Formed Ends, Tow Loops & Wide Vents, 9 - 3/4 Inch Round Bullseye Light Holes For Western Star 49X SFA 2022 & Newer
VALLEY CHROME PLATING
$999.9918 Inch Texas Bumper W/ Rolled Hand Formed Ends, Factor Fog Light, Tow & Vent Holes, 9 - 3/4 Inch Round Bullseye Light Holes By Valley ChromeEquip your Western Star 49X with the Valley Chrome 18 Inch...IT5021969BY- SKU:
- IT5021969BY
- Location:
- Made In USA
- Style Options:
- Texas Hand Formed
- Finish Options:
- Chrome-Plated
- Material Options:
- Steel
- Type Options:
- Set Forward Axle
- Light Options:
- Without Lights
- Product Type:
- Bumpers
- Size Options:
- 7 Gauge
- Height Options:
- 18 Inch
- Make:
- Western Star
$999.99Qty in Cart: 0Price:$999.99Subtotal: -
Teltek Small Pyrometer Kit 2 1/16 Inch Diameter, 40 to 1850 Degree Range W/ Blue Digital Display
TELTEK
$362.99Pyrometer Kit W/ Blue Digital Display , 2 1/16 Inch Diameter, 40 to 1850 Degree RangeImprove engine monitoring and protect your diesel performance system with the Teltek Small Pyrometer Kit, designed...09-1502192- SKU:
- 09-1502192
- Diameter Options:
- 2 Inch
- Shape Options:
- Round
- Finish Options:
- Chrome-Plated
- Color:
- Black
- Location:
- Made In USA
- Product Type:
- Interior
- Make:
- Universal Items
$362.99Qty in Cart: 0Price:$362.99Subtotal: -
4 Inch Stainless Steel Cab/Cowl Panels W/ 18 - 3/4 Inch Round Downglow Light Holes For Peterbilt 389 131BBC
PHOENIX DESIGN
$620.994 Inch Stainless Steel Cab/Cowl Panels W/ 18 - 3/4 Inch Round Downglow Light Holes Fit Peterbilt 389 131BBC* High Quality Cab/Cowl Panel* Made Of 304 Stainless Steel* 9 - 3/4 Inch Round Downglow...01-091201219- SKU:
- 01-091201219
- Truck Class:
- Heavy Duty
- Location:
- Made In USA
- Material Options:
- Stainless Steel
- Make:
- Peterbilt
- Finish Options:
- Polished
- Length Options:
- 52 Inch
- Light Options:
- Without Lights
- Product Type:
- Exterior
$620.99Qty in Cart: 0Price:$620.99Subtotal: