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Western Star Truck Parts

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • 2-5/16 Inch Ball And 157 Locknut For Use With 150 Coupling

    2-5/16 Inch Ball And 157 Locknut For Use With 150 Coupling

    PREMIER

    $122.99
    2-5/16 Inch Ball And 157 Locknut For Use With 150 Coupling* High Quality Ball* 2-5/16 Inch* 157 Locknut* For Use With 150 Coupling* Made In USA* Sold Individually* Warranty On Balls Against Defects...
    09-051100727
    SKU:
    09-051100727
    Location:
    Made In USA
    Rating:
    10000 LBS
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $122.99
    Qty in Cart: 0
    Price:
    $122.99
    Subtotal:
  • 2 Inch Ball And 157 Locknut For Use With 150 Coupling

    2 Inch Ball And 157 Locknut For Use With 150 Coupling

    PREMIER

    $87.99
    2 Inch Ball And 157 Locknut For Use With 150 Coupling* High Quality Ball* 2 Inch* 157 Locknut* For Use With 150 Coupling* Made In USA* Sold Individually* Warranty On Balls Against Defects In...
    09-051100726
    SKU:
    09-051100726
    Diameter Options:
    2 Inch
    Location:
    Made In USA
    Rating:
    10000 LBS
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $87.99
    Qty in Cart: 0
    Price:
    $87.99
    Subtotal:
  • 150PK Replacement Parts For 150 & 160 Coupling

    150PK Replacement Parts For 150 & 160 Coupling

    PREMIER

    $159.99
    150PK Replacement Parts For 150 & 160 Coupling* High Quality Replacement Parts Kit* Includes: - Trigger - Latch And Latch Pin - Bushing - Spring - Roll Pin - Bolt - Lock Nut* Made In USA* Sold...
    09-051100725
    SKU:
    09-051100725
    Location:
    Made In USA
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $159.99
    Qty in Cart: 0
    Price:
    $159.99
    Subtotal:
  • 150-01 Combination Coupling

    150-01 Combination Coupling

    PREMIER

    $336.99
    150-01 Combination Coupling* High Quality Combination Coupling* Max. Gross Trailer Weight 20000 Lbs.* Max. Tongue Weight 2500 Lbs.* Ultimate Latch Capacity 5000 Lbs.* Max. Eye X-Section 1-13/16 Inch*...
    09-051100724
    SKU:
    09-051100724
    Truck Class:
    Universal
    Location:
    Made In USA
    Rating:
    20000 LBS
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $336.99
    Qty in Cart: 0
    Price:
    $336.99
    Subtotal:
  • 150 Combination Coupling

    150 Combination Coupling

    PREMIER

    $301.99
    150 Combination Coupling* High Quality Combination Coupling* 150 Coupling And 155 Ball Capacity MGTW- 10000 Lbs.* One Of Premiers Most Unique And Versatile Couplings Is Our Popular Model 150...
    09-051100723
    SKU:
    09-051100723
    Truck Class:
    Universal
    Location:
    Made In USA
    Rating:
    20000 LBS
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $301.99
    Qty in Cart: 0
    Price:
    $301.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Washer For 135NT Coupling

    Washer For 135NT Coupling

    PREMIER

    $30.16
    Replacement Washer For 135NT Coupling* High Quality Replacement Washer* For 135NT Coupling* Made In USA* Sold Individually* Warranty On Replacement Washers Against Defects In Workmanship & Material...
    09-051100722
    SKU:
    09-051100722
    Truck Class:
    Universal
    Location:
    Made In USA
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $30.16
    Qty in Cart: 0
    Price:
    $30.16
    Subtotal:
  • FREE SHIPPING OVER $249
    Bushing For 135NT Coupling

    Bushing For 135NT Coupling

    PREMIER

    $16.19
    Bushing For 135NT Coupling* High Quality Replacement Bushing* For 135NT Coupling* Made In USA* Sold Individually* Warranty On Replacement Bushings Against Defects In Workmanship & Material From Date...
    09-051100721
    SKU:
    09-051100721
    Location:
    Made In USA
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $16.19
    Qty in Cart: 0
    Price:
    $16.19
    Subtotal:
  • Lock Nut - 1-3/4 Inch For Use With 135Nt Coupling

    Lock Nut - 1-3/4 Inch For Use With 135Nt Coupling

    PREMIER

    $80.99
    Lock Nut- 1-3/4 Inch For Use With 135Nt Coupling* High Quality Replacement Lock Nut* 1 3/4 Inch* For The Use With 135NT Coupling* Made In USA* Sold Individually* Warranty On Replacement Lock Nuts...
    09-051100720
    SKU:
    09-051100720
    Truck Class:
    Universal
    Location:
    Made In USA
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $80.99
    Qty in Cart: 0
    Price:
    $80.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Retaining Ring - 1-3/4 Inch Id For Use With 135Nt Coupling

    Retaining Ring - 1-3/4 Inch Id For Use With 135Nt Coupling

    PREMIER

    $6.45
    Retaining Ring- 1-3/4 Inch Id For Use With 135Nt Coupling* High Quality Replacement Retaining Ring* 1-3/4 Inch ID* For The Use With 135NT Coupling* Made In USA* Sold Individually* Warranty On...
    09-051100719
    SKU:
    09-051100719
    Location:
    Made In USA
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $6.45
    Qty in Cart: 0
    Price:
    $6.45
    Subtotal:
  • Swivel Mounting Plate For Use With 135Nt Coupling

    Swivel Mounting Plate For Use With 135Nt Coupling

    PREMIER

    $166.99
    Swivel Mounting Plate For Use With 135Nt Coupling* High Quality Replacement Swivel Mounting Plate* For Use With 135NT Coupling* Made In USA* Sold Individually* Warranty On Replacement Swivel Mounting...
    09-051100718
    SKU:
    09-051100718
    Location:
    Made In USA
    Truck Class:
    Universal
    Style Options:
    Swivel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $166.99
    Qty in Cart: 0
    Price:
    $166.99
    Subtotal:
  • 135PK Coupling Replacement Part Kit

    135PK Coupling Replacement Part Kit

    PREMIER

    $128.99
    135PK Coupling Replacement Part Kit* High Quality Replacement Parts Kit* Includes:  - Pins - Latch And Latch Lock - Springs - Bushings  - Retaining Rings* Made In USA* Sold Individually* Warranty On...
    09-051100717
    SKU:
    09-051100717
    Truck Class:
    Universal
    Location:
    Made In USA
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $128.99
    Qty in Cart: 0
    Price:
    $128.99
    Subtotal:
  • 135NT Swivel Drawbar Eye

    135NT Swivel Drawbar Eye

    PREMIER

    $732.99
    135NT Swivel Drawbar Eye* High Quality Swivel Coupling* Agricultural And Military Operations Will All Benefit From Premiers 135NT And 235NT Swivel Couplings* Swivel Action Eliminates Torque Between...
    09-051100716
    SKU:
    09-051100716
    Location:
    Made In USA
    Truck Class:
    Universal
    Rating:
    30000 LBS
    Style Options:
    Swivel
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $732.99
    Qty in Cart: 0
    Price:
    $732.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Retaining Rings For Model 140 Coupling Includes 2 Retaining Rings. 3/4 Inch

    Retaining Rings For Model 140 Coupling Includes 2 Retaining Rings. 3/4 Inch

    PREMIER

    $6.45
    Retaining Rings For Model 140 Coupling Includes 2 Retaining Rings. 3/4 Inch* High Quality Replacement Retaining Rings* Includes 2 Retaining Rings* 3/4 Inch* Made In USA* Sold Individually* Warranty...
    09-051100715
    SKU:
    09-051100715
    Truck Class:
    Universal
    Location:
    Made In USA
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $6.45
    Qty in Cart: 0
    Price:
    $6.45
    Subtotal:
  • FREE SHIPPING OVER $249
    Spring For Model 140 Coupling Spring - 3/8 Inch X 1-9/16 Inch

    Spring For Model 140 Coupling Spring - 3/8 Inch X 1-9/16 Inch

    PREMIER

    $11.89
    Spring For Model 140 Coupling Spring- 3/8 Inch X 1-9/16 Inch* High Quality Replacement Spring* For Coupling Spring 3/8 Inch X 1-9/16 Inch* Made In USA* Sold Individually* Warranty On Replacement...
    09-051100714
    SKU:
    09-051100714
    Location:
    Made In USA
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $11.89
    Qty in Cart: 0
    Price:
    $11.89
    Subtotal:
  • FREE SHIPPING OVER $249
    142 Key/Latch For 140 Coupling

    142 Key/Latch For 140 Coupling

    PREMIER

    $30.16
    3/4 Inch Square Key/Latch Replacement For 140 Coupling* High Quality Replacement Key/ Latch* For Coupling Key/ Latch 3/4 Inch Square* Made In USA* Sold Individually* Warranty On Replacement Key/...
    09-051100713
    SKU:
    09-051100713
    Truck Class:
    Universal
    Location:
    Made In USA
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $30.16
    Qty in Cart: 0
    Price:
    $30.16
    Subtotal:
  • Latch For Model 140 Coupling Latch For 140 Coupling

    Latch For Model 140 Coupling Latch For 140 Coupling

    PREMIER

    $171.99
    Latch For Model 140 Coupling Latch For 140 Coupling* High Quality Replacement Latch* Made In USA* Sold Individually* Warranty On Replacement Latches Against Defects In Workmanship & Material From...
    09-051100712
    SKU:
    09-051100712
    Location:
    Made In USA
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $171.99
    Qty in Cart: 0
    Price:
    $171.99
    Subtotal:
  • FREE SHIPPING OVER $249
    131 Replacement Pin For 140 Coupling

    131 Replacement Pin For 140 Coupling

    PREMIER

    $27.06
    131 Replacement Pin For 140 Coupling* High Quality Replacement Pin* For Use With 130, 135NT, 140, 235NT, And 240 Couplings* Made In USA* Sold Individually* Warranty On Replacement Pins Against...
    09-051100711
    SKU:
    09-051100711
    Location:
    Made In USA
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $27.06
    Qty in Cart: 0
    Price:
    $27.06
    Subtotal:
  • 570A Slack Reducing Coupling Kit

    570A Slack Reducing Coupling Kit

    PREMIER

    $1,136.99
    570A Slack Reducing Coupling Kit* High Quality Reducing Coupling Kit* Includes - Coupling - Bolt Kit - Air Chamber And Thimble* Max. Gross Trailer Weight 90000 Lbs.* Max. Tongue Weight 18000 Lbs.*...
    09-051100692
    SKU:
    09-051100692
    Truck Class:
    Universal
    Location:
    Made In USA
    Rating:
    90000 LBS
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $1,136.99
    Qty in Cart: 0
    Price:
    $1,136.99
    Subtotal:
  • 570 Slack Reducing Coupling

    570 Slack Reducing Coupling

    PREMIER

    $975.99
    570 Slack Reducing Coupling* High Quality Slack Reducing Coupling* Max. Gross Trailer Weight 90000 Lbs.* Max. Tongue Weight 18000 Lbs.* Ultimate Latch Capacity 20000 Lbs.* Max. Eye X-Section 1-13/16...
    09-051100691
    SKU:
    09-051100691
    Truck Class:
    Universal
    Location:
    Made In USA
    Rating:
    90000 LBS
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $975.99
    Qty in Cart: 0
    Price:
    $975.99
    Subtotal:
  • 370BC Slack Reducing Coupling Kit

    370BC Slack Reducing Coupling Kit

    PREMIER

    $1,193.99
    370BC Slack Reducing Coupling Kit* High Quality Slack Reducing Coupling Kit* Includes: - Coupling - Bolt Kit - Air Chamber  - Thimble* Max. Gross Trailer Weight 90000 Lbs.* Max. Tongue Weight 18000...
    09-051100690
    SKU:
    09-051100690
    Truck Class:
    Universal
    Location:
    Made In USA
    Rating:
    90000 LBS
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $1,193.99
    Qty in Cart: 0
    Price:
    $1,193.99
    Subtotal:
  • Total: items /

Adding your products to cart

Tough jobs call for tough trucks. And when your Western Star needs parts, you want upgrades that can keep up. Whether you're driving a 4700 series, 4900, or the sleek 5700XE, we’ve got the aftermarket parts to match your truck’s power and personality.

Why Buy Aftermarket Western Star Parts?

- Save money over OEM without sacrificing quality - Upgrade performance with improved durability and function. - Customize your rig inside and out for comfort, style, or branding. - Stay DOT-compliant with lighting, mirrors, and safety upgrades. These parts aren’t just about replacing the old stuff. They’re about boosting what your truck can do—and how good it looks doing it.

Get the Job Done—And Look Good Doing It

We carry Western Star exterior and interior parts built for hard-working trucks. From rugged 5700xe truck bumpers to stylish chrome trim, our components are designed to perform under pressure—and turn heads while doing it. Need replacement parts to stay road-ready? We’ve got them. Want to customize your ride with aftermarket accessories or truck headlights that reflect your brand? You’ll find those here too.

Built for Fleets, Shops & Owner-Ops

Whether you’re wrenching in your shop or managing a fleet, 4 State makes it easy to shop Western Star truck components. Our inventory fits a wide range of models and job needs—from long-haul comfort upgrades to workhorse body parts built for logging, oilfield, or construction routes. We stock: - Cab and sleeper parts. - Engine and performance components. - Lights, visors, fenders, hoods, grilles, and more.

Let’s Get You Back on the Road

We know downtime costs money. That’s why we make it easy to shop Western Star parts online—fast shipping, expert support, and a huge selection of heavy-duty commercial truck parts ready to roll. Ready to make your rig better than new?

Frequently Asked Questions About Western Star Truck Parts

What year models do your Western Star replacement parts fit, and how can I verify compatibility?

Our Western Star parts are designed to fit specific model years and configurations. Most aftermarket parts cover models from 2002 to present, including the 4700, 4800, 4900, and 5700 series. To verify compatibility, check your OEM number and compare it with the fitment details listed on each product page. If you're unsure, contact our support team with your truck's year, model, and OEM - we'll confirm the exact fit before you order.

Are these genuine OEM Western Star parts or aftermarket alternatives?

We carry both OEM and high-quality aftermarket Western Star parts. Aftermarket options typically offer 30-50% savings while maintaining durability standards. Our aftermarket parts are manufactured from grade 304 stainless steel or heavy-duty chrome-plated steel, matching or exceeding OEM specifications. Each product listing clearly indicates whether it's OEM or aftermarket, along with material specifications and warranty details.

What tools and expertise do I need to install Western Star bumpers and exterior parts?

Most bumper installations require basic hand tools including socket sets, wrenches, and a torque wrench. Typical installation takes 2-4 hours for experienced mechanics. Bumpers usually mount using existing frame holes, though some models may require drilling. We recommend having a second person assist with heavy components like bumpers. Professional installation runs $200-500 depending on complexity. All parts include detailed instructions, and our tech support can walk you through any challenges.

What's the difference between chrome, stainless steel, and painted finishes for longevity?

Stainless steel offers the best corrosion resistance and typically lasts 10-15 years without pitting or rust. Chrome-plated steel provides excellent shine but may show wear after 5-7 years in harsh conditions. Painted finishes are most affordable but require touch-ups every 3-5 years. For trucks operating in salt-heavy regions, we strongly recommend stainless steel. Chrome works well for moderate climates with regular washing and maintenance.

Do your Western Star parts come with mounting hardware and warranties?

Yes, all bumpers and major components include necessary mounting hardware unless specifically noted. Standard warranties range from 1 year for chrome parts to 3 years for stainless steel components, covering defects in materials and workmanship. Electrical components typically carry 90-day warranties. Keep your receipt and register products online for faster warranty service. Note that warranties don't cover damage from improper installation or road hazards.


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