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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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  • Price
  • Subtotal
  • Replacement Parts For 480 Coupling

    Replacement Parts For 480 Coupling

    PREMIER

    $486.99
    Trailer 480 Coupling Replacement parts* High Quality Replacement Parts Kit* Includes:   - Retaining Ring  - Spring  - Handle  - Lever  - Bolt  - Pin  - Locknut  - Spacer  - Latch* For 480 Coupling*...
    09-051100747
    SKU:
    09-051100747
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $486.99
    Qty in Cart: 0
    Price:
    $486.99
    Subtotal:
  • Replacement Poly Bushing For Use With 546A And 556A Front End Housing

    Replacement Poly Bushing For Use With 546A And 556A Front End Housing

    PREMIER

    $194.99
    Replacement Poly Bushing W/ 2 Inch ID* High Quality Replacement Bushing* 4-3/4 Inch OD X 5-1/4 Inch L X 2 Inch ID * Poly Bushing* For Use With 546B And 556B Front End Housing* Made In USA* Sold...
    09-051100829
    SKU:
    09-051100829
    Diameter Options:
    4 3/4 Inch
    Color:
    Orange
    Truck Class:
    Universal
    Length Options:
    5 1/4 Inch
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $194.99
    Qty in Cart: 0
    Price:
    $194.99
    Subtotal:
  • 6 Weld On Drawbar Eye

    6 Weld On Drawbar Eye

    PREMIER

    $339.99
    Weld On Drawbar Eye For Mechanical Coupling* High Quality Weld-On Drawbar Eye* Inside Diameter 2-3/8 Inch* Max Gross Trailer Weight 100000 Lbs* Max Tongue Weight 15000 Lbs* Slack Reducing Drawbar...
    09-051100762
    SKU:
    09-051100762
    Rating:
    100000 LBS
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $339.99
    Qty in Cart: 0
    Price:
    $339.99
    Subtotal:
  • 240K Coupling For King T-22 Pintle Hook Replacement

    240K Coupling For King T-22 Pintle Hook Replacement

    PREMIER

    $552.99
    240K CouplingThe 240K Coupling has an effortless-to-handle latch mechanism that is highly resistant to impact. The pintle body is crafted using the exclusive Premalloy material to achieve additional...
    09-051100737
    SKU:
    09-051100737
    Rating:
    45000 LBS
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $552.99
    Qty in Cart: 0
    Price:
    $552.99
    Subtotal:
  • 546A Front End Housing W/ Rubber Bushing For Use W/ 207SE, 307SE, 405SE, 407SE Swivel Drawbar Eyes

    546A Front End Housing W/ Rubber Bushing For Use W/ 207SE, 307SE, 405SE, 407SE Swivel Drawbar Eyes

    PREMIER

    $449.99
    5-3/16 Inch Front End Housing For Use W/ Swivel Drawbar Eyes* High Quality Front End Housing* Includes:   - Housing  - Rubber Bushings  - Washer* Bushing Inside Diameter 2 Inch* Bushing Outside...
    09-051100825
    SKU:
    09-051100825
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $449.99
    Qty in Cart: 0
    Price:
    $449.99
    Subtotal:
  • 536B Front End Housing W/ Poly Bushing For Swivel 207K, 207S, 307K, 307S, 405S Drawbar Eyes

    536B Front End Housing W/ Poly Bushing For Swivel 207K, 207S, 307K, 307S, 405S Drawbar Eyes

    PREMIER

    $496.99
    4.5 Inch Front End Housing* High Quality Front End Housing* Includes:   - Housing  - Poly Bushings   - Washer* Bushing Outside Diameter 4-1/4 Inch* 4-1/2 Inch Length* Maximum Tongue Weight 2500 Lbs*...
    09-051100821
    SKU:
    09-051100821
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $496.99
    Qty in Cart: 0
    Price:
    $496.99
    Subtotal:
  • Replacement Handle Assembly For 580 & 580J Coupling

    Replacement Handle Assembly For 580 & 580J Coupling

    PREMIER

    $154.99
    580 & 580J Coupling Replacement Handle* High Quality Replacement Handle Assembly* Includes:   - Handle  - Locknut  - Bushing* For 580 And 580J* Made In USA* Sold Individually* Warranty On Replacement...
    09-051100750
    SKU:
    09-051100750
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $154.99
    Qty in Cart: 0
    Price:
    $154.99
    Subtotal:
  • 480 Coupling, Non-Air For Heavy Duty Pulling Capacity

    480 Coupling, Non-Air For Heavy Duty Pulling Capacity

    PREMIER

    $1,039.99
    Trailer 480 Coupling For Non* High Quality Coupling* Maximum Gross Trailer Weight 130000 Lbs* Maximum Tongue Weight 21000 Lbs* Ultimate Latch Capacity 30000 Lbs* Maximum Eye X-Section 1-13/16 Inch*...
    09-051100746
    SKU:
    09-051100746
    Truck Class:
    Universal
    Rating:
    130000 LBS
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $1,039.99
    Qty in Cart: 0
    Price:
    $1,039.99
    Subtotal:
  • Replacement Rubber Bushing For Use With 435 And 536B Front End Housing

    Replacement Rubber Bushing For Use With 435 And 536B Front End Housing

    PREMIER

    $100.99
    Replacement Rubber Bushing W/ 2 Inch ID* High Quality Replacement Bushing* 4-1/4 Inch X 4-1/2 Inch With 2 Inch ID * Rubber Bushing* For Use With 435 And 536B Front End Housing* Made In USA* Sold...
    09-051100817
    SKU:
    09-051100817
    Diameter Options:
    4 1/4 Inch
    Truck Class:
    Universal
    Material Options:
    Rubber
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $100.99
    Qty in Cart: 0
    Price:
    $100.99
    Subtotal:
  • 240 Coupling

    240 Coupling

    PREMIER

    $419.99
    240 CouplingThe 240 coupling is designed to fit the mounting pattern of our 135NT and is built to last with added durability and wear resistance. It can handle a maximum gross trailer weight of...
    09-051100736
    SKU:
    09-051100736
    Truck Class:
    Universal
    Rating:
    45000 LBS
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $419.99
    Qty in Cart: 0
    Price:
    $419.99
    Subtotal:
  • 130 Coupling For Light To Medium Duty Hauling

    130 Coupling For Light To Medium Duty Hauling

    PREMIER

    $362.99
    Trailer Coupling Model 130* High Quality Coupling* Maximum Gross Trailer Weight 30000 Lbs* Maximum Tongue Weight 6000 Lbs* Ultimate Latch Capacity 20000 Lbs* Maximum Eye X-Section 1-11/16 Inch*...
    09-051100708
    SKU:
    09-051100708
    Rating:
    30000 LBS
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $362.99
    Qty in Cart: 0
    Price:
    $362.99
    Subtotal:
  • 640S Front End Housing For Use W/ 207S, 307S, 405S Swivel Drawbar Eyes

    640S Front End Housing For Use W/ 207S, 307S, 405S Swivel Drawbar Eyes

    PREMIER

    $496.99
    3.5 Inch Front End Housing Accepts 2.5 Inch Rectangular Tubing Or Standard Channel* High Quality Front End Housing* Includes:  - Housing  - Washer  - Rubber Bushings* Inside Diameter 2 Inch* Outside...
    09-051100813
    SKU:
    09-051100813
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $496.99
    Qty in Cart: 0
    Price:
    $496.99
    Subtotal:
  • Replacement Parts Kit For 820EL Couplings

    Replacement Parts Kit For 820EL Couplings

    PREMIER

    $452.99
    Extended Life Parts Kit For 820EL Couplings* High Quality Replacement Parts Kit* Includes:  - Spring  - 1/2 Inch Retaining Rings  - 5/8 Inch Snap Ring  - Pawl  - Left Pawl Spring  - Right Pawl...
    09-051100695
    SKU:
    09-051100695
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $452.99
    Qty in Cart: 0
    Price:
    $452.99
    Subtotal:
  • 340S Front End Housing For Use W/ 207S, 307S, 405S Swivel Drawbar Eyes

    340S Front End Housing For Use W/ 207S, 307S, 405S Swivel Drawbar Eyes

    PREMIER

    $478.99
    3.5 Inch Front End Housing Accepts 3 Inch Standard Channel Or Square Tubing* High Quality Front End Housing* Includes:   - Housing  - Washer  - Rubber Bushings* Inside Diameter 2 Inch* Outside...
    09-051100809
    SKU:
    09-051100809
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $478.99
    Qty in Cart: 0
    Price:
    $478.99
    Subtotal:
  • 24 Drop Down Coupling For Light Duty Pulling

    24 Drop Down Coupling For Light Duty Pulling

    PREMIER

    $349.99
    Light Duty 24 Drop-Down CouplingThis Drop-Down Coupling Is Great For Light Duty Pulling. The Eyelet Attached To The Top Of The Hook Makes Uncoupling Quick And Easy. It Can Even Be Used For Remote...
    09-051100703
    SKU:
    09-051100703
    Truck Class:
    Universal
    Rating:
    12000 LBS
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $349.99
    Qty in Cart: 0
    Price:
    $349.99
    Subtotal:
  • 820ELA Slack Reducing RetroFit Coupling Kit

    820ELA Slack Reducing RetroFit Coupling Kit

    PREMIER

    $1,405.99
    Slack Reducing Coupling Kit W/ Coupling, Airline, Reducer, Fitting, Bolt Kit, Air Chamber With Adapter Bracket, And Thimble* High Quality Slack Reducing Coupling Kit* Includes:  - Coupling  - Air...
    09-051100694
    SKU:
    09-051100694
    Truck Class:
    Universal
    Rating:
    100000 LBS
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $1,405.99
    Qty in Cart: 0
    Price:
    $1,405.99
    Subtotal:
  • 245DB Bolt On Drawbar Eye

    245DB Bolt On Drawbar Eye

    PREMIER

    $420.99
    Bolt-On Drawbar Eye W/ 2 3/8 Inch ID* High Quality Bolt-On Drawbar Eyes* Inside Diameter 2-3/8 Inch* Maximum Gross Trailer Weight 100000 Lbs* Maximum Tongue Weight 8000 Lbs* Never Attempt Weld Repair...
    09-051100793
    SKU:
    09-051100793
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $420.99
    Qty in Cart: 0
    Price:
    $420.99
    Subtotal:
  • 140 Coupling For Light To Medium Duty Pulling Capacity

    140 Coupling For Light To Medium Duty Pulling Capacity

    PREMIER

    $398.99
    Light To Medium Duty Coupling* High Quality Coupling Premiers* Max Gross Trailer Weight 30000 Lbs* Max Tongue Weight 4500 Lbs* Ultimate Latch Capacity 2250 Lbs* Max Eye X-Section 1-1/2 Inch* Minimum...
    09-051100710
    SKU:
    09-051100710
    Rating:
    30000 LBS
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $398.99
    Qty in Cart: 0
    Price:
    $398.99
    Subtotal:
  • 200L Bolt On Drawbar Eye

    200L Bolt On Drawbar Eye

    PREMIER

    $298.99
    200L Bolt On Drawbar Eye W/ 2 3/8 Inch ID* High Quality Bolt-On Drawbar Eye* Inside Diameter 2-3/8 Inch* Maximum Gross Trailer Weight 100000 Lbs* Maximum Tongue Weight 15000 Lbs* Never Attempt Weld...
    09-051100789
    SKU:
    09-051100789
    Rating:
    100000 LBS
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $298.99
    Qty in Cart: 0
    Price:
    $298.99
    Subtotal:
  • Model 16 Pin And Clevis Coupling

    Model 16 Pin And Clevis Coupling

    PREMIER

    $517.99
    Medium Duty Pin & Clevis Trailer Coupling, Model 16* High Quality Pin And Clevis Coupling* Max Gross Trailer Weight 60000 Lbs* Max Tongue Weight- Not Rated* Ultimate Latch Capacity- Not Rated* Max...
    09-051100698
    SKU:
    09-051100698
    Rating:
    60000 LBS
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $517.99
    Qty in Cart: 0
    Price:
    $517.99
    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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