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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
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
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
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
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BESTfit Oil Pan Isolator Seal Gasket For Caterpillar C15 & Late 3406E Engines
BESTFIT TRUCK PARTS
$119.99BESTfit Diesel CAT C15 & Late 3406E Oil Pan GasketMade of HNBR rubber, this oil pan gasket seal has a one piece design and can withstand service temperatures of -40 to 115C. It is resistant to fuel,...09-071685248- SKU:
- 09-071685248
- Truck Class:
- Universal
- Make:
- Universal Items
- Product Type:
- Engine Parts
$119.99Qty in Cart: 0Price:$119.99Subtotal: -
7 LED 194/168 Dome Type Bulb
GRAND GENERAL
$14.46Revamp your truck lighting with the 7 LED 194/168 Dome Type Bulb. This LED replacement bulb uses the 194/168 bulb number and a dome-style design, making it a direct replacement for compatible...PPR_205754- SKU:
- PPR_205754
- Truck Class:
- Universal
- Make:
- Universal Items
- Product Type:
- Lighting
- Ready To Ship:
- Yes
$14.46Qty in Cart: 0Price:$14.46Subtotal: -
10 LED 194/168 Tower Style Bulb
GRAND GENERAL
$15.19The 10 LED 194/168 Tower Style Bulb is an LED replacement for select truck lighting applications. Designed for 12-volt systems, this tower-style bulb uses 5630 SMD LEDs, with the white version...PPR_205757- SKU:
- PPR_205757
- Truck Class:
- Universal
- Make:
- Universal Items
- Product Type:
- Lighting
- Ready To Ship:
- Yes
$15.19Qty in Cart: 0Price:$15.19Subtotal: -
194/168 Tower Style 6 LED Light Bulb
GRAND GENERAL
$14.25 - $14.72Refresh truck lighting with the 194/168 Tower Style 6 LED Light Bulb. Made as an aftermarket replacement for 194/168 bulbs, this 12-volt tower-style bulb uses six 5630 SMD LEDs, with two positioned...PPR_205747- SKU:
- PPR_205747
- Truck Class:
- Universal
- Make:
- Universal Items
- Material Options:
- Aluminum
- Product Type:
- Lighting
- Ready To Ship:
- Yes
$14.25 - $14.72Qty in Cart: 0Price:$14.25 - $14.72Subtotal: -
FREE SHIPPING OVER $249
Chrome Bezel For 168 Series Lights
PETERSON MFG
$2.74168 Series Bezel* High Quality Bezel* Chrome Plated* Fits M168 Series Lights* Bezel Only* Sold Individually* Made In USA* Warranty On Bezel Against Defects In Workmanship & Material From Date Of...09-1605073- SKU:
- 09-1605073
- Location:
- Made In USA
- Truck Class:
- Universal
- Material Options:
- Plastic/Poly
- Make:
- Universal Items
- Finish Options:
- Chrome-Plated
- Product Type:
- Lighting
$2.74Qty in Cart: 0Price:$2.74Subtotal: -
FREE SHIPPING OVER $249
2 Inch 2 Diode Red LED 168 Marker Light
PETERSON MFG
$14.02Clearance/Marker Light* High Quality Light* LED 168* LED 2 Diodes* Red Light* Sold Individually* Made in the USA* Warranty on lights against defects in workmanship & material from date of purchase...09-160106081- SKU:
- 09-160106081
- Truck Class:
- Universal
- Make:
- Universal Items
- Location:
- Made In USA
- Color:
- Red
- Material Options:
- Plastic/Poly
- Product Type:
- Lighting
- Ready To Ship:
- Yes
$14.02Qty in Cart: 0Price:$14.02Subtotal: -
Oil Plug Replaces 168-2288, 1682288 For Caterpillar C7 Engines
AUTOMANN USA
$15.240.953 Inch Oil Plug W/ 1.122 Inch A/F & M18 x 1.5 ThreadReplace worn or damaged plugs with this premium Oil Plug for Caterpillar C7 engines. With a 1.122-inch A/F, 0.953-inch length, and M18 x 1.5...29-07200009- SKU:
- 29-07200009
- Product Type:
- Engine Parts
- Style Options:
- Caterpillar
- Make:
- Universal Items
$15.24Qty in Cart: 0Price:$15.24Subtotal: -
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: -
3 Inch Sleeper Panels W/ 4 P1 Amber/Clear LED Lights, 12 In Spacing For Peterbilt W/ 36/44 Inch Unibilt Sleepers No Extenders
PHOENIX DESIGN
$266.99Sleeper Panels W/ 4 P1 Amber LED Clear Lens LED Lights Fit Peterbilt W/ 36/44 Inch Unibilt Sleepers* High Quality Sleeper Panels * Made Of 304 Stainless Steel * 3 Inch* With 2 P1 Amber/Clear LED...01-10123168- SKU:
- 01-10123168
- Light Options:
- With Lights
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Material Options:
- Stainless Steel
- Finish Options:
- Polished
- Make:
- Peterbilt
- Length Options:
- 44 Inch
- Product Type:
- Exterior
$266.99Qty in Cart: 0Price:$266.99Subtotal: -
Radiator Gasket 4.187 X 3.25 Inch C To C For Kenworth
AUTOMANN USA
$11.55Kenworth Radiator Gasket Replaces K134168* High Quality Radiator Gasket* Dimensions: - 4.187 Inch C To C Length - 3.25 Inch C To C Width - 0.653 Inch Bolt Holes* Sold Individually * Warranty On...02-07020001- SKU:
- 02-07020001
- Truck Class:
- Heavy Duty
- Make:
- Kenworth
- Product Type:
- Engine Parts
$11.55Qty in Cart: 0Price:$11.55Subtotal: -
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: -
Gloss Black Diamond Plate Aluminum Low Profile Deep Angled Crossover Tool Box- 63 Inch For Pickup Trucks
AFTERMARKET
$828.9963 Inch Gloss Black Diamond Plate Aluminum Low Profile Deep Angled Crossover Tool Box Fits Pickup TrucksBuilt to fit irregular truck beds, the Gloss Black Low Profile Deep Angled 63-Inch Crossover...09-020100168- SKU:
- 09-020100168
- Length Options:
- 63 Inch
- Color:
- Black
- Truck Class:
- Universal
- Height Options:
- 17 Inch
- Width Options:
- 20 Inch
- Material Options:
- Aluminum
- Make:
- Universal Items
- Finish Options:
- Diamond Plate
- Product Type:
- Toolboxes
$828.99Qty in Cart: 0Price:$828.99Subtotal: -
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
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 OVER $249
Black Rubber Caution Wide Turns Mud Flap 24 X 30 Inch
AFTERMARKET
$73.9924 X 30 Inch Black Caution Wide Turns Mud FlapThis pair of black rubber mud flaps has bright yellow text to caution passing vehicles of wide turns. They mount behind your tires to prevent small...09-0507168- SKU:
- 09-0507168
- Height Options:
- 30 Inch
- Truck Class:
- Universal
- Width Options:
- 24 Inch
- Material Options:
- Rubber
- Make:
- Universal Items
- Color:
- Black
- Product Type:
- Mud Flaps
$73.99Qty in Cart: 0Price:$73.99Subtotal: -
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: -
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: