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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
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
How to Choose the Right W990 Drop Visor(Post)The best Kenworth W990 drop visor depends on your design preference, mounting configuration, and windshield type or cab style (curved or flat). Buying a Custom W990 Truck Visor Online? If you're brow
T880 Visor Ultimate Buyer's Guide(Post)There are countless Kenworth T880 visor options to choose from depending on the theme and style you’re going for. Here's a quick buyer's guide for Kenworth T880 aftermarket visors. Before you buy, con
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 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
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
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
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.
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
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
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
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
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
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
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
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
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
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BESTfit Black Steel Center Bumper Section W/ Tow Holes Replaces 21-26020-011 For Freightliner Columbia
BESTFIT TRUCK PARTS
$303.99BESTfit Painted Steel Center Bumper W/ Round Tow, Pin Holes In Upper FaceThis BESTfit old style black center bumper is made of a strong stainless steel and has round tow pin holes in the upper face...03-010112- SKU:
- 03-010112
- Truck Class:
- Heavy Duty
- Position:
- Center
- Material Options:
- Steel
- Make:
- Freightliner
- Product Type:
- Bumpers
- Ready To Ship:
- Yes
$303.99Qty in Cart: 0Price:$303.99Subtotal: -
Stainless Front Air Cleaner Panels W/ 12 P3 Amber/Clear LEDs For Freightliner Classic XL W/ 11 Inch Nelson
PHOENIX DESIGN
$339.99Front Air Cleaner Panels W/ 12 P3 Amber LED Clear Lens Lights Fit Freightliner Classic XL W/ 11 Inch Nelson* High Quality Front Air Cleaner Panel * Made Of 304 Stainless Steel * 6 P3 Lights Per Side*...03-090500011- SKU:
- 03-090500011
- Truck Class:
- Heavy Duty
- Material Options:
- Stainless Steel
- Make:
- Freightliner
- Finish Options:
- Polished
- Light Options:
- With Lights
- Position:
- Front
- Product Type:
- Exterior
$339.99Qty in Cart: 0Price:$339.99Subtotal: -
High Flow Performance Air Filter With Washable Element Media For Kenworth, Peterbilt 372 & 379 - Pair
FLEET FILTERS
$839.99High Performance Air Filter Media Fits Kenworth, Peterbilt 372, 379 - PairYou never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime,...29-090500011- SKU:
- 29-090500011
- Truck Class:
- Heavy Duty
- Make:
- Peterbilt
- Make:
- Kenworth
- Product Type:
- Exterior
$839.99Qty in Cart: 0Price:$839.99Subtotal: -
FREE SHIPPING
BESTfit Aluminum Upper Fuel Tank Mounting Bracket For Peterbilt W/ 26 Inch Diameter Tanks Replaces 11-04855M000, 1104855M000
BESTFIT TRUCK PARTS
$335.99Aluminum Upper Fuel Tank Mounting Bracket For 26 Inch Diameter Fuel Tanks By BESTfit Replaces 11-04855M000, 1104855M000 Fits Peterbilt W/ 26 Inch Diameter TanksUpgrade your Peterbilt with this...01-0601011- SKU:
- 01-0601011
- Truck Class:
- Heavy Duty
- Product Type:
- Fuel Tanks
- Material Options:
- Aluminum
- Make:
- Peterbilt
- Ready To Ship:
- Yes
- Position:
- Upper
- Diameter Options:
- 26 Inch
$335.99Qty in Cart: 0Price:$335.99Subtotal: -
Merritt Aluminum Cab Rack W/ 2 Enclosures 80 X 68 X 11 Inch
MERRITT
$4,593.99Aluminum Cab Rack W/ Jail Bar WindowKeep your cab protected and your gear organized with the Merritt 68 x 80 Inch Aluminum Cab Rack. Equipped with two enclosures with chain racks and a 27" x 23" jail...320381M0115- SKU:
- 320381M0115
- Height Options:
- 68 Inch
- Width Options:
- 80 Inch
- Material Options:
- Aluminum
- Product Type:
- Cargo Control
- Location:
- Made In USA
- Make:
- Universal Items
- Length Options:
- 11 Inch
$4,593.99Qty in Cart: 0Price:$4,593.99Subtotal: -
High Pressure AC Switch - 18-03600, 11-1406, 1460 For Kenworth, Peterbilt
AFTERMARKET
$83.99High Pressure AC Switch* High Quality High Pressure AC Switch* 8 1/2 Inch Length* 2 Pin* Sensors / Switches Control The AC Compressor* Fan And Expansion Valve For An Efficiently Functioning Air...29-07100011- SKU:
- 29-07100011
- Material Options:
- Plastic/Poly
- Truck Class:
- Heavy Duty
- Make:
- Peterbilt
- Make:
- Kenworth
- Product Type:
- Engine Parts
$83.99Qty in Cart: 0Price:$83.99Subtotal: -
FREE SHIPPING OVER $249
TPHD 2.25 Inch Oil Filler Cap W/ T Handle For Cummins
TPHD
$34.66Oil Filler Cap By TPHD* High Quality Expandable Metal - Rubber Cap* Fits 2.25 Inch ID Oil Filler Hole* For Cummins Engines* Sold Individually* Warranty On Oil Filler Cap Against Defects In...09-072011- SKU:
- 09-072011
- Truck Class:
- Universal
- Make:
- Universal Items
- Product Type:
- Engine Parts
- Ready To Ship:
- Yes
$34.66Qty in Cart: 0Price:$34.66Subtotal: -
304 SS Bolt-Mount Hood Extensions W/ Louvers For International 9900ix 1999-2011
ROADWORKS
$257.99RoadWorks 304 Stainless Steel Bolt-Mount Hood Extensions W/ Louvers* High Quality Hood Extensions* Made Of 304 Stainless Steel * With Louvers* Bolt Mount * Sold As Pair* Warranty On Hood Extensions...07-123000011- SKU:
- 07-123000011
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Material Options:
- Stainless Steel
- Make:
- International
- Finish Options:
- Polished
- Product Type:
- Hood Parts & Acc.
$257.99Qty in Cart: 0Price:$257.99Subtotal: -
Texas Chrome Bumper, 10 Gauge W/ Boxed Ends & Mounting Plates By BESTfit For Peterbilt 357/378 SFA & 379
BESTFIT TRUCK PARTS
$759.99 - $868.99Choose Option(s) to see description.Fitment* Fits Peterbilt 357 1987 thru 2007* Fits Peterbilt 378 1988 thru 2007** Fits Above SBA Models Only* Fits Peterbilt 379 1987 thru 2007BESTfit 18 Inch Chrome...PPR_301150- SKU:
- PPR_301150
- Finish Options:
- Chrome-Plated
- Product Type:
- Bumpers
- Height Options:
- 20 Inch
- Material Options:
- Steel
- Type Options:
- Blind Mount
- Style Options:
- Texas Boxed End
- Truck Class:
- Heavy Duty
- Height Options:
- 18 Inch
- Size Options:
- 10 Gauge
- Make:
- Peterbilt
- Ready To Ship:
- Yes
$759.99 - $868.99Qty in Cart: 0Price:$759.99 - $868.99Subtotal: -
6 Inch Low Profile Fuel Filter Wrench For Davco Models 382 & 84
AUTOMANN USA
$29.22Low Profile Wrench For 6 Inch OD Fuel Filters* High Quality Wrench* 6 Inch* Low Profile Design For Better Clearance* Sold Individually* Warranty On Wrenches Against Defects In Workmanship & Material...09-21000116- SKU:
- 09-21000116
- Product Type:
- Tools
- Length Options:
- 6 Inch
- Make:
- Universal Items
$29.22Qty in Cart: 0Price:$29.22Subtotal: -
FREE SHIPPING OVER $249
55MM Diesel Particulate Filter Gasket, Clamp Kit - Replaces A0004902241, A6804910480 For Freightliner & Western Star
DAYTON / DORMAN
$167.9955MM Diesel Particulate Filter Gasket & Clamp Kit* High Quality Diesel Particulate Filter Gasket And Clamp Kit* Band Width: 55 Mm, 0.17 Mm* Clamping Type: Bolt* Material: Stainless Steel, Mbg-D*...29-080600011- SKU:
- 29-080600011
- Truck Class:
- Heavy Duty
- Material Options:
- Stainless Steel
- Make:
- Freightliner
- Product Type:
- Exhaust
$167.99Qty in Cart: 0Price:$167.99Subtotal: -
11 Inch Stainless Steel Drop Visor For Kenworth T680 & T880 W/ Low Roof Day Cab Models
TRUX ACCESSORIES
$1,200.9911 Inch Stainless Steel Drop Visor Fits Kenworth T680 & T880 W/ Low Roof Day Cab ModelsAre you looking for a heavy-duty visor for your rig? 4 State Trucks offers this great looking stainless steel...02-0900100117- SKU:
- 02-0900100117
- Truck Class:
- Heavy Duty
- Make:
- Kenworth
- Material Options:
- Stainless Steel
- Height Options:
- 11 1/2 Inch
- Light Options:
- Without Lights
- Type Options:
- Blind Mount
- Product Type:
- Exterior
- Style Options:
- Drop
$1,200.99Qty in Cart: 0Price:$1,200.99Subtotal: -
Plastic Headlight Switch Housing, On/ Off Function W/ 11 Blade Terminal And Center Mounting Position For International
DAYTON / DORMAN
$284.99On/ Off Function Headlight Switch Housing W/ 11 Blade Terminal* High Quality Headlight Switch Housing* Plastic* Mounting Position- Center* Switch Mounting Type- Clip* Connector Gender- Female*...07-160600011- SKU:
- 07-160600011
- Truck Class:
- Heavy Duty
- Material Options:
- Plastic/Poly
- Make:
- International
- Product Type:
- Lighting
$284.99Qty in Cart: 0Price:$284.99Subtotal: -
P1 LED Marker And Clearance Light W/ Packard Plug
PHOENIX DESIGN
$17.78 - $20.39Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of TrucksRed LED Red Lens P1 Light Kit W/ Packard Plug, Chrome Plastic BezelRed LED Red Lens P1 Light Kit W/...PPR_301130- SKU:
- PPR_301130
- Location:
- Made In USA
- Truck Class:
- Universal
- Color:
- Amber
- Material Options:
- Plastic/Poly
- Finish Options:
- Chrome-Plated
- Color:
- Red
- Truck Class:
- Heavy Duty
- Product Type:
- Lighting
- Make:
- Universal Items
- Ready To Ship:
- Yes
$17.78 - $20.39Qty in Cart: 0Price:$17.78 - $20.39Subtotal: -
18 Inch Blind Mount Stainless Texas Boxed End Bumper, 10 Gauge W/ UST Mount Plates For Freightliner, Kenworth & Peterbilt
VALLEY CHROME PLATING
$1,151.99Stainless Steel Boxed End Bumper W/ UST Mounts by Valley Chrome. Fits Freightliner, Peterbilt & KenworthIf you are in the market for a new or replacement bumper, look no further than this 10-gauge...GO000011SUST- SKU:
- GO000011SUST
- Truck Class:
- Heavy Duty
- Height Options:
- 18 Inch
- Style Options:
- Texas Boxed End
- Material Options:
- Stainless Steel
- Finish Options:
- Chrome-Plated
- Make:
- Kenworth
- Make:
- Peterbilt
- Make:
- Freightliner
- Type Options:
- Blind Mount
- Size Options:
- 10 Gauge
- Product Type:
- Bumpers
$1,151.99Qty in Cart: 0Price:$1,151.99Subtotal: -
11 Inch Stainless Steel Drop Visor For International 9100/92/93/94/9900 Series W/ Flat Windshield
TRUX ACCESSORIES
$523.9911 Inch Stainless Steel Drop Visor Fits International 9100/92/93/94/9900 Series W/ Flat Windshield* High Quality Visor* Flat Windshields* Stainless Steel * 11 Inch* Drop Style* Sold Individually*...07-09003011- SKU:
- 07-09003011
- Material Options:
- Stainless Steel
- Product Type:
- Exterior
- Truck Class:
- Heavy Duty
- Height Options:
- 11 Inch
- Make:
- International
- Cab Style:
- Flat Windshield
- Style Options:
- Drop
$523.99Qty in Cart: 0Price:$523.99Subtotal: -
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: -
12 Gauge Customs 7 X 11 Inch Aluminum Mighty Wicked Visor For Kenworth T800 & W900 W/ Flat 2 PC Windshield
TWELVE GAUGE
$441.997 X 11 Inch Aluminum Mighty Wicked Visor By 12 Gauge Customs Fits Kenworth T800 & W900 W/ Flat 2 PC Windshield* High Quality Visor* Made Of Aluminum* Must Be Painted* Mighty Wicked Style* Fits Flat...02-0901103- SKU:
- 02-0901103
- Truck Class:
- Heavy Duty
- Make:
- Kenworth
- Finish Options:
- Paintable
- Material Options:
- Aluminum
- Light Options:
- Without Lights
- Product Type:
- Exterior
$441.99Qty in Cart: 0Price:$441.99Subtotal: -
BESTfit Chrome Texas Bumper, 10 Gauge W/ Hand Formed Ends & Tow Hole For Peterbilt 357 & 378 SFA, & 379
BESTFIT TRUCK PARTS
$631.99 - $780.99Choose Option(s) to see description.Fitment* Fits Peterbilt 357 1987 thru 2007* Fits Peterbilt 378 1988 thru 2007** Fits SFA Models Above Only* Fits Peterbilt 379 1987 thru 2007BESTfit 18 Inch Chrome...PPR_301149- SKU:
- PPR_301149
- Finish Options:
- Chrome-Plated
- Height Options:
- 18 Inch
- Product Type:
- Bumpers
- Height Options:
- 20 Inch
- Size Options:
- 10 Gauge
- Truck Class:
- Heavy Duty
- Style Options:
- Texas Hand Formed
- Type Options:
- Standard Mount
- Material Options:
- Steel
- Style Options:
- Texas Square Hand Formed
- Make:
- Peterbilt
- Ready To Ship:
- Yes
$631.99 - $780.99Qty in Cart: 0Price:$631.99 - $780.99Subtotal: -
12 Gauge Customs 8 X 11 Inch Aluminum Reverse Bowtie Visor For Kenworth T800 & W900 W/ 1 PC Flat Windshield
TWELVE GAUGE
$446.998 X 11 Inch Aluminum Reverse Bowtie Visor By 12 Gauge Customs Fits Kenworth T800 & W900 W/ 1 PC Flat WindshieldKeep in the shade and the rain out of your way with this quality aluminum reverse bowtie...02-0901102- SKU:
- 02-0901102
- Truck Class:
- Heavy Duty
- Make:
- Kenworth
- Finish Options:
- Paintable
- Material Options:
- Aluminum
- Light Options:
- Without Lights
- Product Type:
- Exterior
$446.99Qty in Cart: 0Price:$446.99Subtotal: