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Kenworth Frame & Chassis

Reinforce your Kenworth's core with 4 State Trucks' superior Kenworth semi truck frame and chassis components. Count on us for high-grade Kenworth frame and chassis parts that boost structural integrity and durability, guaranteeing your rig handles every payload with unwavering stability. From critical replacements to performance-enhancing upgrades, our parts ensure your Kenworth semi truck's foundation remains rock-solid, making each journey safer and more dependable. Choose 4 State Trucks to fortify your Kenworth's backbone, providing the sturdy base needed for optimal performance and longevity. Whether you're navigating city streets or conquering long-haul routes, our frame and chassis components give you the confidence to tackle any challenge, load after load.
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  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • 127-8 Bolt On Slack Reducing Eye Parts

    127-8 Bolt On Slack Reducing Eye Parts

    PREMIER

    $447.99
    127-8 Bolt On Slack Reducing Eye Parts* High Quality Slack Reducing Eye Parts* Includes:  - Shoe  - Drawbar Eye  - 8 Inch Push Rod* Max. Gross Trailer Weight 100000 Lbs.* Max. Tongue Weight 15000 Lbs...
    09-051100785
    SKU:
    09-051100785
    Rating:
    100000 LBS
    Truck Class:
    Universal
    Location:
    Made In USA
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $447.99
    Qty in Cart: 0
    Price:
    $447.99
    Subtotal:
  • 127-7 Bolt On Slack Reducing Drawbar Eyes

    127-7 Bolt On Slack Reducing Drawbar Eyes

    PREMIER

    $447.99
    127-7 Bolt On Slack Reducing Eye PartsCrafted from durable Premalloy material, the 127 Bolt-On Slack Reducing Drawbar Eye works seamlessly with Premier's 500 Mechanical Slack Adjuster or 281 and 282...
    09-051100784
    SKU:
    09-051100784
    Rating:
    100000 LBS
    Truck Class:
    Universal
    Location:
    Made In USA
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $447.99
    Qty in Cart: 0
    Price:
    $447.99
    Subtotal:
  • 309 Weld On Drawbar Eye - 15000 Lbs

    309 Weld On Drawbar Eye - 15000 Lbs

    PREMIER

    $563.99
    309 Weld On Drawbar Eye* High Quality Weld- On Drawbar Eye* Max. Gross Trailer Weight 150000 Lbs.* Max. Tongue Weight 15000 Lbs.* Diameter 3 Inch* Never Attempt Weld Repair Of Damaged Or Worn Drawbar...
    09-051100783
    SKU:
    09-051100783
    Rating:
    150000 LBS
    Truck Class:
    Universal
    Location:
    Made In USA
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $563.99
    Qty in Cart: 0
    Price:
    $563.99
    Subtotal:
  • 108 Weld On Drawbar Eye - 15000 Lbs

    108 Weld On Drawbar Eye - 15000 Lbs

    PREMIER

    $339.99
    108 Weld On Drawbar Eye* High Quality Weld- On Drawbar Eye* Max. Gross Trailer Weight 100000 Lbs.* Max. Tongue Weight 15000 Lbs.* I.D. Diameter 2-3/8 Inch* Never Attempt Weld Repair Of Damaged Or...
    09-051100782
    SKU:
    09-051100782
    Rating:
    100000 LBS
    Truck Class:
    Universal
    Location:
    Made In USA
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $339.99
    Qty in Cart: 0
    Price:
    $339.99
    Subtotal:
  • 304 Weld On Drawbar Eye - 15,000 Lbs

    304 Weld On Drawbar Eye - 15,000 Lbs

    PREMIER

    $347.99
    304 Weld On Drawbar Eye* High Quality Weld- On Drawbar Eye* Max. Gross Trailer Weight 150000 Lbs.* Max. Tongue Weight 15000 Lbs.* I.D. Diameter 3 Inch* Never Attempt Weld Repair Of Damaged Or Worn...
    09-051100781
    SKU:
    09-051100781
    Rating:
    150000 LBS
    Diameter Options:
    3 Inch
    Truck Class:
    Universal
    Location:
    Made In USA
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $347.99
    Qty in Cart: 0
    Price:
    $347.99
    Subtotal:
  • Premalloy Drop Pintle Couplings - Left & Right Hand Operation - Pair

    Premalloy Drop Pintle Couplings - Left & Right Hand Operation - Pair

    PREMIER

    $2,743.99
    Left & Right Hand Drop Pintle Couplings W/ Max Trailer Weight of 90,0000 LBS* High Quality Pintle Coupling* 890C Drop* Left And Right Hand Operation* Max Grow Trailer Weight 90000 Lbs* Max Tongue...
    09-051100760
    SKU:
    09-051100760
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $2,743.99
    Qty in Cart: 0
    Price:
    $2,743.99
    Subtotal:
  • Premalloy 890CL Drop Pintle Coupling W/ 2 1/8 Inch Handle For Left Hand Operation

    Premalloy 890CL Drop Pintle Coupling W/ 2 1/8 Inch Handle For Left Hand Operation

    PREMIER

    $1,775.99
    Drop Pintle Coupling W/ Max Trailer Weight of 90,0000 LBS* High Quality Pintle Coupling* 890Cl Drop* Left Hand Operation* Max Grow Trailer Weight 90000 Lbs* Max Tongue Weight 18000 Lbs* Ultimate...
    09-051100758
    SKU:
    09-051100758
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $1,775.99
    Qty in Cart: 0
    Price:
    $1,775.99
    Subtotal:
  • Handle Assembly For 690L Coupling Includes 387 - Locknut. 691C - Bushing And 691 - Handle

    Handle Assembly For 690L Coupling Includes 387 - Locknut. 691C - Bushing And 691 - Handle

    PREMIER

    $258.99
    Handle Assembly For 690L Coupling Includes 387- Locknut. 691C- Bushing And 691- Handle* High Quality Coupling Replacement Handle Assembly* Includes:  - Locknut - Bushing And Handle* Made In USA* Sold...
    09-051100756
    SKU:
    09-051100756
    Location:
    Made In USA
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $258.99
    Qty in Cart: 0
    Price:
    $258.99
    Subtotal:
  • Premalloy 690L Drop Pintle Hook Coupling W/ Max Trailer Weight of 90,0000 LBS

    Premalloy 690L Drop Pintle Hook Coupling W/ Max Trailer Weight of 90,0000 LBS

    PREMIER

    $1,257.99
    Pintle Coupling For Mid To Heavy Duty Towing Applications* High Quality Pintle Coupling* 690L Drop* Made Of Premiers Exclusive Premalloy For Maximum Wear Resistance* Max Grow Trailer Weight 90000 Lbs...
    09-051100752
    SKU:
    09-051100752
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $1,257.99
    Qty in Cart: 0
    Price:
    $1,257.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Polymer Bushing For Use With 235NT Coupling

    Polymer Bushing For Use With 235NT Coupling

    PREMIER

    $15.08
    Polymer Bushing For Use With 235NT Coupling* High Quality Polymer Bushing * For Use With 235NT Coupling* Made In USA* Sold Individually* Warranty On Polymer Bushing S Against Defects In Workmanship &...
    09-051100733
    SKU:
    09-051100733
    Location:
    Made In USA
    Truck Class:
    Universal
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $15.08
    Qty in Cart: 0
    Price:
    $15.08
    Subtotal:
  • Swivel Mounting Plate For Use With 235NT Coupling

    Swivel Mounting Plate For Use With 235NT Coupling

    PREMIER

    $141.99
    Swivel Mounting Plate For Use With 235NT Coupling* High Quality Swivel Mounting Plate* For Use With 235NT Coupling* Made In USA* Sold Individually* Warranty On Swivel Mounting Plates Against Defects...
    09-051100732
    SKU:
    09-051100732
    Truck Class:
    Universal
    Location:
    Made In USA
    Style Options:
    Swivel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $141.99
    Qty in Cart: 0
    Price:
    $141.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Retainer Ring - 1-7/8 Inch For Use With 207. 235N. 307. 405L And 405S

    Retainer Ring - 1-7/8 Inch For Use With 207. 235N. 307. 405L And 405S

    MINIMIZER

    $11.89
    Retainer Ring- 1-7/8 Inch For Use With 207. 235N. 307. 405L And 405S* High Quality Retainer Ring* 1-7/8 Inch* Made In USA* Sold Individually* Warranty On Retainer Rings Against Defects In Workmanship...
    09-051100731
    SKU:
    09-051100731
    Location:
    Made In USA
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $11.89
    Qty in Cart: 0
    Price:
    $11.89
    Subtotal:
  • 235NT Swivel Drawbar Eye

    235NT Swivel Drawbar Eye

    PREMIER

    $738.99
    235NT Swivel Drawbar Eye* High Quality Swivel Coupling* Not To Be Used With Swivel-Type Drawbar Eye.* Max. Gross Trailer Weight 60000 Lbs.* Max. Tongue Weight 12000 Lbs.* Ultimate Latch Capacity...
    09-051100730
    SKU:
    09-051100730
    Rating:
    60000 LBS
    Location:
    Made In USA
    Truck Class:
    Universal
    Style Options:
    Swivel
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $738.99
    Qty in Cart: 0
    Price:
    $738.99
    Subtotal:
  • 160HD Pintle Hitch

    160HD Pintle Hitch

    PREMIER

    $289.99
    160HD Pintle Hitch* High Quality Coupling* With An Additional 10000 Lbs. Of Gross Trailer Weight Capacity * 2000 Lbs. Of Tongue Weight Capacity* Max. Gross Trailer Weight 40000 Lbs.* Max. Tongue...
    09-051100729
    SKU:
    09-051100729
    Rating:
    40000 LBS
    Truck Class:
    Universal
    Location:
    Made In USA
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $289.99
    Qty in Cart: 0
    Price:
    $289.99
    Subtotal:
  • 160 Coupling For Dolly Haul Back & Other Light Applications

    160 Coupling For Dolly Haul Back & Other Light Applications

    PREMIER

    $270.99
    160 Coupling For Dolly Haul Back & Other Light Applications* High Quality Coupling* Ideal For Dolly Haul Back And Other Light To Medium Duty Applications* Max. Gross Trailer Weight 30000 Lbs.* Max...
    09-051100728
    SKU:
    09-051100728
    Rating:
    30000 LBS
    Truck Class:
    Universal
    Location:
    Made In USA
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $270.99
    Qty in Cart: 0
    Price:
    $270.99
    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:
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Adding your products to cart

Find the premium, aftermarket parts for your Kenworth Frame & Chassis. This category has everything you need for your Kenworth's frame, chassis, and suspension. Find air tanks, shocks, bushings, leaf springs, and more to maintain your truck's structural integrity and smooth ride for models like the T800, W900, and T660. Replacement Parts: Direct-fit OEM replacements for seamless installation. Performance Upgrades: Stiffer leaf springs and adjustable shocks for better handling and weight capacity. Custom Accessories: stainless trim, fender flares, and mud flaps to enhance style and protection. Whether you're doing repairs, boosting performance, or customizing your rig's look, this category has you covered.

Frequently Asked Questions About Kenworth Frame & Chassis

What years and models are compatible with your Kenworth frame and chassis parts?

Our Kenworth frame and chassis components are designed for W900, T800, T880, T680, and T660 models. Most parts fit 1985-current year models, but compatibility varies by specific component. Always check the product description for exact year ranges, or contact our team with your OEM for guaranteed fitment. We maintain detailed compatibility charts for each product to ensure proper installation.

Are these aftermarket or OEM Kenworth frame parts, and what's the quality difference?

We carry both genuine OEM Kenworth parts and high-quality aftermarket alternatives. OEM parts guarantee exact factory specifications and fitment. Our aftermarket options are manufactured to meet or exceed OEM standards, often using upgraded materials like 304 stainless steel instead of mild steel. All aftermarket suppliers are vetted for quality control and many offer lifetime warranties on their products.

What tools and experience level do I need to install frame-mounted accessories?

Most frame-mounted accessories require basic hand tools, a drill with metal bits, and safety equipment. Installation difficulty ranges from simple bolt-on parts (30-60 minutes) to more complex items requiring cutting or welding. Professional installation is recommended for structural modifications or if you lack experience with heavy truck maintenance.

What finish options are available and how do they hold up against road salt and weather?

Common finishes include chrome-plated steel, polished stainless steel, powder-coated steel, and raw steel for custom painting. Stainless steel offers the best corrosion resistance without maintenance. Chrome requires regular cleaning to prevent pitting. Powder coating provides excellent protection when properly applied. For trucks operating in salt-heavy regions, we recommend stainless steel or powder-coated options with zinc primer.

Do frame extensions or modifications affect my truck's warranty or DOT compliance?

Frame modifications can potentially void manufacturer warranties if not performed to factory specifications. Always consult your warranty documentation before making structural changes. For DOT compliance, ensure any modifications maintain proper weight distribution and don't exceed manufacturer GVWR ratings. Frame extensions must be properly reinforced and may require engineering certification in some states. We recommend consulting a certified truck mechanic or frame shop for major modifications.


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