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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.
  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • 820ELA Slack Reducing Coupling Kit

    820ELA Slack Reducing Coupling Kit

    PREMIER

    $1,466.99
    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...
    09-051100693
    SKU:
    09-051100693
    Rating:
    100000 LBS
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $1,466.99
    Qty in Cart: 0
    Price:
    $1,466.99
    Subtotal:
  • 2 Weld On Drawbar Eye

    2 Weld On Drawbar Eye

    PREMIER

    $101.99
    Weld On Drawbar Eye W/ 2 Inch ID* High Quality Weld-On Drawbar Eye* Inside Diameter 2 Inch* Maximum Gross Trailer Weight 12000 Lbs* Maximum Tongue Weight 1800 Lbs* Never Attempt Weld Repair Of...
    09-051100777
    SKU:
    09-051100777
    Truck Class:
    Universal
    Rating:
    12000 LBS
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $101.99
    Qty in Cart: 0
    Price:
    $101.99
    Subtotal:
  • 22 Weld On Drawbar Eye W/ 30 Degree V Angle

    22 Weld On Drawbar Eye W/ 30 Degree V Angle

    PREMIER

    $262.99
    Weld On Drawbar Eye W/ 2-3/8 Inch ID* High Quality Weld-On Drawbar Eye* Inside Diameter 2-3/8 Inch* 30 Degree V Angle* Weld Tabs Can Be Heated And Bent Plus/Minus 10 Degrees To Accommodate...
    09-051100773
    SKU:
    09-051100773
    Truck Class:
    Universal
    Rating:
    100000 LBS
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $262.99
    Qty in Cart: 0
    Price:
    $262.99
    Subtotal:
  • 123 Drawbar Eye W/ 7 Inch Pushrod

    123 Drawbar Eye W/ 7 Inch Pushrod

    PREMIER

    $320.99
    Weld-On Slack Reducing Drawbar Eye For Use W/ 3 Inch Round Tubing* High Quality Weld-On Slack Reducing Eye* Includes:  - Shoe  - Drawbar Eye  - 7 Inch Pushrod* Inside Diameter 2-3/8 Inch* Designed...
    09-051100769
    SKU:
    09-051100769
    Truck Class:
    Universal
    Rating:
    100000 LBS
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $320.99
    Qty in Cart: 0
    Price:
    $320.99
    Subtotal:
  • 20 Weld On Drawbar Eye For 3 Inch Standard Channel Or Tubing For Heavy Duty Towing

    20 Weld On Drawbar Eye For 3 Inch Standard Channel Or Tubing For Heavy Duty Towing

    PREMIER

    $290.99
    Weld-On Drawbar Eye W/ 2-3/8 ID* High Quality Weld-On Drawbar Eye* Inside Diameter 2-3/8 Inch* Designed For 3 Inch Standard Channel Or Tubing* Max Gross Trailer Weight 100000 Lbs* Max Tongue Weight...
    09-051100765
    SKU:
    09-051100765
    Truck Class:
    Universal
    Rating:
    100000 LBS
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $290.99
    Qty in Cart: 0
    Price:
    $290.99
    Subtotal:
  • Replacement Parts Kit For 690L Coupling

    Replacement Parts Kit For 690L Coupling

    PREMIER

    $740.99
    690L Coupling Replacement Part Kit* High Quality Replacement Pars Kit* Includes:  - Drive Screw  - Spring  - Locknut  - Clip And Cable  - Handle  - Hook* For 690L Coupling* Made In USA* Sold As Set*...
    09-051100753
    SKU:
    09-051100753
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $740.99
    Qty in Cart: 0
    Price:
    $740.99
    Subtotal:
  • Replacement Parts Kit For 580 Coupling

    Replacement Parts Kit For 580 Coupling

    PREMIER

    $362.99
    580 Coupling Replacement Parts* High Quality Replacement Part Kit* Includes:  - Spring  - Locknut  - Handle  - Clip And Cable  - Bushing  - Latch  - Spring  - Pawl  - Bolt * For 580 Coupling* Made In...
    09-051100749
    SKU:
    09-051100749
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $362.99
    Qty in Cart: 0
    Price:
    $362.99
    Subtotal:
  • 35NTEL Swivel Coupling

    35NTEL Swivel Coupling

    PREMIER

    $1,119.99
    35NTEl Heavy Duty Swivel Coupling With One Hand Operation* High Quality Coupling* GTW Capacity Of 110000 Lbs* Max Gross Trailer Weight 110000 Lbs* Max Tongue Weight 20000 Lbs* Latch Capacity 65000...
    09-051100740
    SKU:
    09-051100740
    Rating:
    110000 LBS
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $1,119.99
    Qty in Cart: 0
    Price:
    $1,119.99
    Subtotal:
  • Parts Replacement Kit For 130, 240, 240K And 240KL Couplings

    Parts Replacement Kit For 130, 240, 240K And 240KL Couplings

    PREMIER

    $123.99
    Coupling Replacement Parts* High Quality Replacement Parts Kit* Includes:   - Pin  - Latch  - Spring  - Bushing  - Latch Lock  - Pin  - (4) Snap Rings* For 130/240/240K/240KL Couplings* Made In USA*...
    09-051100709
    SKU:
    09-051100709
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $123.99
    Qty in Cart: 0
    Price:
    $123.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Air Line Kit For 820EL Couplings

    Air Line Kit For 820EL Couplings

    PREMIER

    $30.16
    Air Line Kit For 820EL Coupling W/ Air Line, Reducer Fitting & 836 Fitting* High Quality Air Line Kit* Includes:  - Air Line  - Reducer Fitting  - Fitting* For 820ELA And 820ELR* Made In USA* Sold As...
    09-051100696
    SKU:
    09-051100696
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $30.16
    Qty in Cart: 0
    Price:
    $30.16
    Subtotal:
  • Pin And Collar Kit For Jost JSK37H

    Pin And Collar Kit For Jost JSK37H

    AUTOMANN USA

    $100.99
    Pin And Collar KitRestore your Jost JSK37H fifth wheel to peak performance with the Pin and Collar Kit. This high-quality kit comes complete with bracket pins, collars, lock tab plates, and cap...
    09-05110018
    SKU:
    09-05110018
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $100.99
    Qty in Cart: 0
    Price:
    $100.99
    Subtotal:
  • Polyurethane 4 1/4 x 1 1/8 Inch I.D. Bushing For Holland Fifth Wheel

    Polyurethane 4 1/4 x 1 1/8 Inch I.D. Bushing For Holland Fifth Wheel

    ENERGY SUSPENSION

    $21.11
    Black Polyurethane 4 1/4 x 1 1/8 Inch I.D. Bushing* High Quality Bushing* Polyurethane* Black* 4.25 X 1.125 ID* For Holland Fifth Wheel* Made In USA* Sold Individually* Warranty On Bushings Against...
    09-05110012
    SKU:
    09-05110012
    Truck Class:
    Heavy Duty
    Color:
    Black
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $21.11
    Qty in Cart: 0
    Price:
    $21.11
    Subtotal:
  • FREE SHIPPING OVER $249
    15/16 And 7/8 Inch Chrome Plastic Top Hat Nut Cover With Flange - 10 Pack

    15/16 And 7/8 Inch Chrome Plastic Top Hat Nut Cover With Flange - 10 Pack

    AFTERMARKET

    $12.89
    Nut Cover* Made Of High Quality Chrome Plated Plastic* Top Hat Style With Flange* 15/16 Inch And 7/8 Inch Bolt Heads* Sold As Pack* Warranty On Nut Cover Against Defects In Workmanship & Material...
    09-050603010
    SKU:
    09-050603010
    Truck Class:
    Universal
    Style Options:
    Top Hat
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $12.89
    Qty in Cart: 0
    Price:
    $12.89
    Subtotal:
  • FREE SHIPPING OVER $249
    12MM & 7/16 Inch Chrome Plastic Top Hat Nut Cover with Flange - 10 Pack

    12MM & 7/16 Inch Chrome Plastic Top Hat Nut Cover with Flange - 10 Pack

    AFTERMARKET

    $10.71
    Nut Cover* Made Of High Quality Chrome Plated Plastic* Top Hat Style With Flange* 7/16 Inch And 12MM Bolt Heads* Sold As Pack* Warranty On Nut Cover Against Defects In Workmanship & Material From...
    09-050602810
    SKU:
    09-050602810
    Truck Class:
    Universal
    Style Options:
    Top Hat
    Size Options:
    12 mm
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $10.71
    Qty in Cart: 0
    Price:
    $10.71
    Subtotal:
  • FREE SHIPPING OVER $249
    15MM & 5/8 Inch Chrome Plastic Top Hat Nut Cover With Flange - 10 Pack

    15MM & 5/8 Inch Chrome Plastic Top Hat Nut Cover With Flange - 10 Pack

    AFTERMARKET

    $12.89
    Nut Cover* Made Of High Quality Chrome Plated Plastic* Top Hat Style With Flange* 5/8 Inch And 15MM Bolt Heads* Sold As Pack* Made In USA* Warranty On Nut Cover Against Defects In Workmanship &...
    09-050602610
    SKU:
    09-050602610
    Truck Class:
    Universal
    Style Options:
    Top Hat
    Size Options:
    15 mm
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $12.89
    Qty in Cart: 0
    Price:
    $12.89
    Subtotal:
  • FREE SHIPPING OVER $249
    1.125 & 1.0625 Inch Chrome Plastic Top Hat Nut Cover with Flange - 10 Pack

    1.125 & 1.0625 Inch Chrome Plastic Top Hat Nut Cover with Flange - 10 Pack

    AFTERMARKET

    $20.39
    Nut Cover* Made Of High Quality Chrome Plated Plastic* Top Hat Style With Flange* 1.125 Inch And 1.0625 Inch Bolt Heads* Sold As Pack* Warranty On Nut Cover Against Defects In Workmanship & Material...
    09-050602410
    SKU:
    09-050602410
    Truck Class:
    Universal
    Style Options:
    Top Hat
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $20.39
    Qty in Cart: 0
    Price:
    $20.39
    Subtotal:
  • FREE SHIPPING OVER $249
    15/16 & 7/8 Inch Chrome Plastic Top Hat Nut Cover With Flange - 10 Pack

    15/16 & 7/8 Inch Chrome Plastic Top Hat Nut Cover With Flange - 10 Pack

    AFTERMARKET

    $12.89
    Nut Cover* Made Of High Quality Chrome Plated Plastic* Top Hat Style With Flange* 15/16 Inch And 7/8 Inch* Sold As Pack* Made In USA* Warranty On Nut Cover Against Defects In Workmanship & Material...
    09-050602210
    SKU:
    09-050602210
    Truck Class:
    Universal
    Style Options:
    Top Hat
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $12.89
    Qty in Cart: 0
    Price:
    $12.89
    Subtotal:
  • FREE SHIPPING OVER $249
    30MM Chrome Plastic Huck Rivet Cover -10 Pack

    30MM Chrome Plastic Huck Rivet Cover -10 Pack

    AFTERMARKET

    $16.12
    Huck Rivet Cover* Made Of High Quality Chrome Plated Plastic* Top Hat Style With Flange* 30MM Bolt Heads* Sold As Pack* Warranty On Nut Cover Against Defects In Workmanship & Material From Date Of...
    09-050603110
    SKU:
    09-050603110
    Truck Class:
    Universal
    Style Options:
    Top Hat
    Material Options:
    Plastic/Poly
    Size Options:
    30 mm
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $16.12
    Qty in Cart: 0
    Price:
    $16.12
    Subtotal:
  • FREE SHIPPING OVER $249
    10MM And 3/8 Inch Chrome Plastic Top Hat Nut Cover With Flange - 10 Pack

    10MM And 3/8 Inch Chrome Plastic Top Hat Nut Cover With Flange - 10 Pack

    AFTERMARKET

    $11.85
    Nut Cover* Made Of High Quality Chrome Plated Plastic* Top Hat Style With Flange* 3/8 Inch And 10MM Bolt Heads* Sold As Pack* Made In USA* Warranty On Nut Cover Against Defects In Workmanship &...
    09-050602910
    SKU:
    09-050602910
    Truck Class:
    Universal
    Style Options:
    Top Hat
    Size Options:
    10 mm
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $11.85
    Qty in Cart: 0
    Price:
    $11.85
    Subtotal:
  • FREE SHIPPING OVER $249
    15/16 & 7/8 Inch Chrome Plastic Bolt Heads Top Hat Nut Cover W/ Flange

    15/16 & 7/8 Inch Chrome Plastic Bolt Heads Top Hat Nut Cover W/ Flange

    LIFETIME NUT COVERS

    $1.93
    Chrome Plastic Tall Top Hat Nut Cover With FlangeThis high quality tall top nut cover with a flange by Lifetime Nut Covers is made of chrome plated plastic. It is designed to turn one way to fit a...
    09-0506030
    SKU:
    09-0506030
    Truck Class:
    Universal
    Location:
    Made In USA
    Style Options:
    Top Hat
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $1.93
    Qty in Cart: 0
    Price:
    $1.93
    Subtotal:
  • Total: items /

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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