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Western Star Trucks

Looking for Western Star truck parts? At 4 State Trucks, you'll find everything from durable replacements to custom accessories for your rig. Explore and find the perfect parts for your Western Star truck today!
  • Product
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    60 Inch Smooth Rolled Edge Flange Half Fenders W/ Mounting Kit, 16 Gauge Stainless Steel Swivel Style Center Mounting Brackets

    60 Inch Smooth Rolled Edge Flange Half Fenders W/ Mounting Kit, 16 Gauge Stainless Steel Swivel Style Center Mounting Brackets

    TRUX ACCESSORIES

    $716.99
    Smooth Rolled Edge Flange Half Fenders W/ Mounting Kit Swivel Style Center Mounting Brackets 60 Inch 16 Gauge Stainless SteelEnhance your truck's durability and style with this high-quality Smooth...
    09-110302014K
    SKU:
    09-110302014K
    Product Type:
    Rear Fenders
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $716.99
    Qty in Cart: 0
    Price:
    $716.99
    Subtotal:
  • FREE SHIPPING
    76 Inch Poly Rolled Edge Single Fenders W/ Mounting Kit Polypropylene

    76 Inch Poly Rolled Edge Single Fenders W/ Mounting Kit Polypropylene

    TRUX ACCESSORIES

    $402.99
    Poly Rolled Edge Single Fenders W/ Mounting Kit 76 InchEnhance your truck's durability and appearance with this high-quality Fender Kit with Mounting Kit, crafted from tough polypropylene for...
    09-110501060K
    SKU:
    09-110501060K
    Product Type:
    Rear Fenders
    Make:
    Universal Items
    $402.99
    Qty in Cart: 0
    Price:
    $402.99
    Subtotal:
  • FREE SHIPPING
    142 Inch Smooth Rolled Edge Full Fenders W/ Mounting Kit 14 Gauge Stainless Steel

    142 Inch Smooth Rolled Edge Full Fenders W/ Mounting Kit 14 Gauge Stainless Steel

    TRUX ACCESSORIES

    $1,503.99
    Smooth Rolled Edge Full Fenders W/ Mounting Kit 142 Inch 14 Gauge Stainless SteelEnhance your rig's durability and road presence with this high-quality Full Fender Kit with Mounting Kit, crafted from...
    09-110303006K
    SKU:
    09-110303006K
    Product Type:
    Rear Fenders
    Make:
    Universal Items
    $1,503.99
    Qty in Cart: 0
    Price:
    $1,503.99
    Subtotal:
  • FREE SHIPPING
    66 Inch Smooth Rolled Edge Half Fenders W/ Mounting Kit Stainless Steel

    66 Inch Smooth Rolled Edge Half Fenders W/ Mounting Kit Stainless Steel

    TRUX ACCESSORIES

    $1,053.99
    Smooth Rolled Edge Half Fenders W/ Mounting Kit Stainless Steel 66 InchUpgrade your rig with this premium Smooth Rolled Edge Half Fender Kit with Mounting Kit, designed for strength, style, and...
    09-110302013K
    SKU:
    09-110302013K
    Product Type:
    Rear Fenders
    Make:
    Universal Items
    $1,053.99
    Qty in Cart: 0
    Price:
    $1,053.99
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  • LC 7-5 X 24 Chrome Plated Steel Bullhorn Top Stack

    LC 7-5 X 24 Chrome Plated Steel Bullhorn Top Stack

    LINCOLN CHROME

    $367.99
    7-5 X 24 Inch Bullhorn Stack By Lincoln ChromeUpgrade your exhaust styling with the Lincoln Chrome Bullhorn Top Stack, built for strength, durability, and long-lasting performance in heavy-duty...
    09-08652406
    SKU:
    09-08652406
    Height Options:
    24 Inch
    Location:
    Made In USA
    Diameter Options:
    7 Inch
    Style Options:
    Bull Hauler Turn
    Material Options:
    Steel
    Finish Options:
    Chrome-Plated
    Product Type:
    Exhaust
    Make:
    Universal Items
    $367.99
    Qty in Cart: 0
    Price:
    $367.99
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  • 60 Inch Smooth Rolled Edge Flange Half Fenders W/ Mounting Kit, Triangular Style Center Mounting Brackets 16 Gauge Stainless Steel

    60 Inch Smooth Rolled Edge Flange Half Fenders W/ Mounting Kit, Triangular Style Center Mounting Brackets 16 Gauge Stainless Steel

    TRUX ACCESSORIES

    $597.99
    Smooth Rolled Edge Flange Half Fenders W/ Mounting Kit, Triangular Style Center Mounting Brackets 60 Inch 16 Gauge Stainless SteelEnhance your rig's protection and style with this high-quality Half...
    09-110302017K
    SKU:
    09-110302017K
    Product Type:
    Rear Fenders
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $597.99
    Qty in Cart: 0
    Price:
    $597.99
    Subtotal:
  • FREE SHIPPING
    80 Inch Smooth Rolled Edge Half Fenders W/ Mounting Kit 16 Gauge Stainless Steel

    80 Inch Smooth Rolled Edge Half Fenders W/ Mounting Kit 16 Gauge Stainless Steel

    TRUX ACCESSORIES

    $1,030.99
    Smooth Rolled Edge Half Fenders W/ Mounting Kit 16 Gauge Stainless Steel 80 InchThis premium Rolled Edge Half Fender Kit with Mounting Hardware is built for durability, protection, and a clean...
    09-110302016K
    SKU:
    09-110302016K
    Product Type:
    Rear Fenders
    Make:
    Universal Items
    $1,030.99
    Qty in Cart: 0
    Price:
    $1,030.99
    Subtotal:
  • LC 7-5 X 64 Chrome Bull Hauler Exhaust Stack W/ 5 Inch OD On Bottom

    LC 7-5 X 64 Chrome Bull Hauler Exhaust Stack W/ 5 Inch OD On Bottom

    LINCOLN CHROME

    $701.99
    7-5 X 64 Inch Bull Hauler Exhaust Stack W/ 5 Inch OD On Bottom By Lincoln ChromeUpgrade your rig with the durable and eye-catching Bull Hauler Exhaust Stack, designed to deliver both premium...
    09-08010296
    SKU:
    09-08010296
    Height Options:
    64 Inch
    Style Options:
    Bull Hauler Turn
    Diameter Options:
    7 Inch
    Location:
    Made In USA
    Finish Options:
    Chrome-Plated
    Material Options:
    Steel
    Product Type:
    Exhaust
    Make:
    Universal Items
    $701.99
    Qty in Cart: 0
    Price:
    $701.99
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  • Stainless Steel Hydraulic Tank Strap For 24 Inch Tanks

    Stainless Steel Hydraulic Tank Strap For 24 Inch Tanks

    AFTERMARKET

    $56.39
    Hydraulic Tank Strip Stainless Steel Fits 24 Inch TanksSecure your hydraulic system with the Stainless Steel Hydraulic Tank Strap, designed for strength, durability, and long-lasting performance in...
    09-06010017
    SKU:
    09-06010017
    Length Options:
    24 Inch
    Product Type:
    Fuel Tanks
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    $56.39
    Qty in Cart: 0
    Price:
    $56.39
    Subtotal:
  • LC 36 Chrome Bull Hauler Top Stack W/ 6-5 Inch OD Extended Plain End

    LC 36 Chrome Bull Hauler Top Stack W/ 6-5 Inch OD Extended Plain End

    LINCOLN CHROME

    $309.99
    36 Inch Bull Hauler Top Stack W/ 6-5 Inch OD Extended Plain End By Lincoln ChromeEnhance your truck's appearance and exhaust performance with the Bull Hauler Top Stack, built for drivers who want...
    09-086536043E
    SKU:
    09-086536043E
    Location:
    Made In USA
    Finish Options:
    Chrome-Plated
    Product Type:
    Exhaust
    Diameter Options:
    6 Inch
    Height Options:
    36 Inch
    Material Options:
    Steel
    Style Options:
    Bull Hauler Turn
    Make:
    Universal Items
    $309.99
    Qty in Cart: 0
    Price:
    $309.99
    Subtotal:
  • FREE SHIPPING
    80 Inch Stainless Steel Smooth Single Axle Fenders & Heavy Duty Mounting Kit

    80 Inch Stainless Steel Smooth Single Axle Fenders & Heavy Duty Mounting Kit

    TRUX ACCESSORIES

    $1,251.99
    Smooth Single Axle Fenders & Heavy Duty Mounting Kit Stainless Steel 80 InchUpgrade your truck's protection and appearance with this premium Smooth Single Axle Fender Kit with Heavy Duty Mounting...
    09-110301017K
    SKU:
    09-110301017K
    Product Type:
    Rear Fenders
    Make:
    Universal Items
    $1,251.99
    Qty in Cart: 0
    Price:
    $1,251.99
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  • Iowa Customs Merritt Dynadeck Pogo Stick Plate Only

    Iowa Customs Merritt Dynadeck Pogo Stick Plate Only

    IOWA CUSTOMS

    $124.99
    Stainless Steel Merritt Dynadeck Pogo Stick Plate Only, Snap-On By Iowa CustomsImprove your trailer deck durability and appearance with the Iowa Customs Pogo Stick Plate Only, designed for strength,...
    09-05500180
    SKU:
    09-05500180
    Location:
    Made In USA
    Product Type:
    Air, Electrical, & Safety
    Finish Options:
    Polished
    Material Options:
    Stainless Steel
    Type Options:
    Snap Mount
    Make:
    Universal Items
    $124.99
    Qty in Cart: 0
    Price:
    $124.99
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  • FREE SHIPPING OVER $249
    Standard Style Horn Cover Chrome Plated Steel, 7 1/4 To 7 1/2 Inch Diameter

    Standard Style Horn Cover Chrome Plated Steel, 7 1/4 To 7 1/2 Inch Diameter

    GRAND GENERAL

    $17.42
    7 1/4 To 7 1/2 Inch Diameter Chrome Plated Steel Standard Style Horn CoverEnhance your truck's interior styling with the Standard Style Horn Cover, built for durability, fitment accuracy, and...
    09-0513138
    SKU:
    09-0513138
    Finish Options:
    Chrome-Plated
    Product Type:
    Frame & Chassis
    Style Options:
    Standard
    Material Options:
    Steel
    Make:
    Universal Items
    $17.42
    Qty in Cart: 0
    Price:
    $17.42
    Subtotal:
  • FREE SHIPPING OVER $249
    Black Painted Steel Mounted Bracket For 24 Inch Saddlemount Hydraulic Tank

    Black Painted Steel Mounted Bracket For 24 Inch Saddlemount Hydraulic Tank

    AFTERMARKET

    $134.39
    Mounted Bracket Black Painted Steel Fits 24 Inch Saddlemount Hydraulic TankSecure your hydraulic system with the Stainless Steel Hydraulic Tank Strap, designed for strength, durability, and...
    09-06010018
    SKU:
    09-06010018
    Material Options:
    Steel
    Color:
    Black
    Product Type:
    Fuel Tanks
    Make:
    Universal Items
    $134.39
    Qty in Cart: 0
    Price:
    $134.39
    Subtotal:
  • Teltek Fuel Pressure PSI Sensor 0 to 150 PSI, 1/8 Inch NPT Thread

    Teltek Fuel Pressure PSI Sensor 0 to 150 PSI, 1/8 Inch NPT Thread

    TELTEK

    $121.99
    0 To 150 PSI Fuel Pressure Sensor W/ 1/8 Inch NPT ThreadEnsure accurate fuel system monitoring with the Teltek Fuel Pressure PSI Sensor, designed for dependable performance in heavy-duty truck and...
    09-071000108
    SKU:
    09-071000108
    Location:
    Made In USA
    Product Type:
    Fuel Tanks
    Make:
    Universal Items
    $121.99
    Qty in Cart: 0
    Price:
    $121.99
    Subtotal:
  • On Sale
    Limited Quantity Available
    Iowa Customs 16 Inch Stainless Steel Rear Center Panel W/ Radius Corners, 5 X 4 Inch Light Holes

    Iowa Customs 16 Inch Stainless Steel Rear Center Panel W/ Radius Corners, 5 X 4 Inch Light Holes

    IOWA CUSTOMS

    Now: $710.39
    Was: $887.99
    Stainless Steel Rear Center Panel W/ Radius Corners 16 Inch, 5 X 4 Inch Light Holes By Iowa CustomsUpgrade your rig's rear lighting setup with this premium Iowa Customs Stainless Steel Rear Center...
    09-05160038
    SKU:
    09-05160038
    Finish Options:
    Polished
    Material Options:
    Stainless Steel
    Light Options:
    Without Lights
    Location:
    Made In USA
    Width Options:
    33 Inch
    Height Options:
    16 Inch
    Product Type:
    Bumpers
    Make:
    Universal Items
    Now: $710.39
    Was: $887.99
    Qty in Cart: 0
    Price:
    Now: $710.39
    Was: $887.99
    Subtotal:
  • Iowa Customs Stainless Steel Inserts For Merritt Dyna Deck Flush Mount Deck Plates

    Iowa Customs Stainless Steel Inserts For Merritt Dyna Deck Flush Mount Deck Plates

    IOWA CUSTOMS

    $71.99
    Inserts For Merritt Dyna Deck Flush Mount Deck Plates Stainless Steel By Iowa CustomsUpgrade your trailer deck finish with the Iowa Customs Stainless Steel, built for durability, corrosion...
    09-050300070
    SKU:
    09-050300070
    Location:
    Made In USA
    Product Type:
    Frame & Chassis
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $71.99
    Qty in Cart: 0
    Price:
    $71.99
    Subtotal:
  • Iowa Customs Merritt Dynadeck Slide In Rail Deck Plate Accessories, 20 Inch Storage Box Only, Stainless Steel

    Iowa Customs Merritt Dynadeck Slide In Rail Deck Plate Accessories, 20 Inch Storage Box Only, Stainless Steel

    IOWA CUSTOMS

    $1,197.99
    20 Inch Stainless Steel Merritt Dynadeck Slide In Rail Deck Plate Accessories, Storage Box OnlyImprove your truck's storage efficiency with this premium Iowa Customs Slide In Rail Deck Storage Box,...
    09-0503000022
    SKU:
    09-0503000022
    Location:
    Made In USA
    Product Type:
    Frame & Chassis
    Length Options:
    14 Inch
    Width Options:
    20 Inch
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    $1,197.99
    Qty in Cart: 0
    Price:
    $1,197.99
    Subtotal:
  • Bulldog Suspension Shock Front, Extended Length 26.85 Inch, Collapsed 16.61 Inch

    Bulldog Suspension Shock Front, Extended Length 26.85 Inch, Collapsed 16.61 Inch

    BULLDOG HD SHOCKS

    $42.33
    Front Suspension Shock Extended Length 26.85 Inch, Collapsed 16.61 InchRestore dependable steering response and ride quality with this high-quality Bulldog Front Suspension Shock designed for...
    09-05000005
    SKU:
    09-05000005
    Product Type:
    Frame & Chassis
    Style Options:
    Heavy Duty
    Length Options:
    27 Inch
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $42.33
    Qty in Cart: 0
    Price:
    $42.33
    Subtotal:
  • FREE SHIPPING OVER $249
    Vent Plug W/ 40 Micron Filter, Steel, 3/4 Inch NPT Thread

    Vent Plug W/ 40 Micron Filter, Steel, 3/4 Inch NPT Thread

    BUYERS PRODUCTS

    $16.53
    Hydraulic Tank Steel Vent Plug W/ 40 Micron Filter, Steel, 3/4 Inch NPT ThreadImprove hydraulic system protection and reliability with this high-quality Vent Plug, designed for heavy-duty hydraulic...
    09-02500274
    SKU:
    09-02500274
    Product Type:
    Cargo Control
    Height Options:
    3 Inch
    Material Options:
    Steel
    Diameter Options:
    3 Inch
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $16.53
    Qty in Cart: 0
    Price:
    $16.53
    Subtotal:
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Western Star Semi Truck Parts and Accessories

Western Star trucks are known for strength, style, and staying power—and your parts should match that same level of toughness. At 4 State Trucks, we stock premium Western Star semi truck parts and accessories to help keep your rig running right. Whether you're working a Western Star 4900 on the job site or hauling across the country in a Western Star 5700, we’ve got the commercial truck parts you need to stay rolling.

High-Quality Parts for Every Western Star Truck Model

No matter what kind of job your Western Star handles, we’ve got the semi truck parts to keep it in top shape. Our inventory includes replacement and aftermarket parts for both heavy-duty vocational models like the 4900 and long-haul tractors like the 5700. From bumpers and grilles to cab accessories, lights, and engine components—we carry a full selection of truck parts and accessories to restore or upgrade your ride. Built to meet the demands of serious drivers, this lineup keeps your truck working as hard as you do.

Best Features of Western Star Parts & Accessories

When it comes to buying truck parts online, you want parts that are built to last. That’s why our Western Star parts are known for: Fuel-efficient engine compatibility to reduce long-term costs. Rugged design for commercial use, off-road durability, and long-haul wear. Precise fitment across multiple configurations, including day cab and sleeper setups. Parts made for easy installs—saving you time and hassle. Wide inventory of online truck parts for maintenance, upgrades, and customization. Whether you’re replacing worn components or customizing your cab, you’ll find parts that deliver both function and style.

Shop Commercial Truck Parts Online with 4 State Trucks

At 4 State Trucks, we make it easy to find and order Western Star truck parts online. Whether you drive a 4900 or 5700, our goal is to keep your truck running at peak performance with minimal downtime. From must-have semi truck parts to hard-to-find upgrades, we offer affordable pricing, fast shipping, and expert support. Shop online truck parts today and keep your Western Star on the road and working hard.

Frequently Asked Questions About Western Star Truck Parts

What year models and series are your Western Star parts compatible with?

Our Western Star parts cover models from the early 2000s through current production years, including the 4700, 4800, 4900, 5700XE, and 6900 series. Each product listing specifies exact compatibility by year, model, and OEM range. For older Heritage models or specific configurations, we recommend contacting our support team with your OEM number to ensure proper fitment, as Western Star made several mid-year changes that can affect compatibility.

Are your aftermarket parts built to the same quality standards as OEM Western Star parts?

Our aftermarket parts are manufactured to meet or exceed OEM specifications, using heavy-duty materials like 304 stainless steel for chrome parts and 16-gauge steel for painted components. Many of our suppliers are the same manufacturers that produce parts for Western Star's assembly lines. Each part undergoes quality testing for proper fitment and durability. We back this with detailed warranties that match or exceed OEM coverage periods.

What are the most common installation challenges for Western Star bumpers and grilles?

The most frequent installation issues involve bracket alignment on 4900 series trucks due to frame variations, and electrical connections for LED-equipped bumpers on 5700XE models. Most installations require basic hand tools and take 2-4 hours. Pre-2010 models may need mounting hole modifications. We provide detailed installation guides with measurements, and our tech support can walk you through any fitment concerns before you start the installation.

What finish options are available, and how do they hold up in different climates?

We offer chrome-plated steel, polished stainless steel, painted steel, and powder-coated aluminum options. Chrome performs well in dry climates but requires regular maintenance in salt-heavy regions. Stainless steel offers the best corrosion resistance for coastal and winter road conditions. Painted finishes use automotive-grade primers and paints that resist chipping and fading for 5-7 years under normal conditions. Powder coating provides the most durable colored finish option.

Do you carry hard-to-find parts for discontinued Western Star models?

Yes, we maintain inventory for many discontinued models including the Heritage Classic, older 4900 variants, and pre-2005 4800 series trucks. Our network includes specialized manufacturers who produce limited runs of obsolete parts. If a part is not listed on our website, our parts specialists can often source it through our supplier network or recommend compatible alternatives that have been successfully used by other Western Star owners.


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