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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
  • 2200ELL Slack Reducing Coupling

    2200ELL Slack Reducing Coupling

    PREMIER

    $852.99
    2200ELL Slack Reducing Coupling* High Quality Reducing Coupling* Coupling Only * With 2075 Low Profile Lever Installed* Max. Gross Trailer Weight 100000 Lbs.* Max. Tongue Weight 20000 Lbs.* Ultimate...
    09-051100664
    SKU:
    09-051100664
    Location:
    Made In USA
    Rating:
    100000 LBS
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $852.99
    Qty in Cart: 0
    Price:
    $852.99
    Subtotal:
  • 2200ELA Slack Reducing Coupling Kit

    2200ELA Slack Reducing Coupling Kit

    PREMIER

    $1,000.99
    2200ELA Slack Reducing Coupling Kit* High Quality Reducing Coupling Kit* Includes: - Coupling - Bolt Kit - Air Chamber - Air Chamber Adapter Bracket - Thimble* Max. Gross Trailer Weight 100000 Lbs.*...
    09-051100663
    SKU:
    09-051100663
    Location:
    Made In USA
    Rating:
    100000 LBS
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $1,000.99
    Qty in Cart: 0
    Price:
    $1,000.99
    Subtotal:
  • 2200EL Slack Reducing Coupling

    2200EL Slack Reducing Coupling

    PREMIER

    $799.99
    2200EL Slack Reducing Coupling* High Quality Reducing Coupling* Max. Gross Trailer Weight 100000 Lbs.* Max. Tongue Weight 20000 Lbs.* Ultimate Latch Capacity 60000 Lbs.* Max. Eye X-Section 1-13/16...
    09-051100662
    SKU:
    09-051100662
    Location:
    Made In USA
    Rating:
    100000 LBS
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $799.99
    Qty in Cart: 0
    Price:
    $799.99
    Subtotal:
  • 2200LA Slack Reducing Coupling Kit

    2200LA Slack Reducing Coupling Kit

    PREMIER

    $840.99
    2200LA Slack Reducing Coupling Kit* High Quality Reducing Coupling Kit* Includes: - Coupling - Bolt Kit - Air Chamber - Air Chamber Adapter Bracket  - Thimble* Max. Gross Trailer Weight 100000 Lbs.*...
    09-051100661
    SKU:
    09-051100661
    Location:
    Made In USA
    Rating:
    100000 LBS
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $840.99
    Qty in Cart: 0
    Price:
    $840.99
    Subtotal:
  • 2200L Slack Reducing Coupling Kit

    2200L Slack Reducing Coupling Kit

    PREMIER

    $674.99
    2200L Slack Reducing Coupling Kit* High Quality Reducing Coupling* Max. Gross Trailer Weight 100000 Lbs.* Max. Tongue Weight 20000 Lbs.* Ultimate Latch Capacity 60000 Lbs.* Max. Eye X-Section 1-13/16...
    09-051100660
    SKU:
    09-051100660
    Location:
    Made In USA
    Rating:
    100000 LBS
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $674.99
    Qty in Cart: 0
    Price:
    $674.99
    Subtotal:
  • 2075K Coupling Replacement Part Kit

    2075K Coupling Replacement Part Kit

    PREMIER

    $71.99
    2075K Coupling Replacement Part Kit* High Quality Replacement Parts Kit * Includes: - Lever - Retaining Rings - Pin And Spacer* Made In USA* Sold Individually* Warranty On Replacement Parts Kit S...
    09-051100659
    SKU:
    09-051100659
    Location:
    Made In USA
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $71.99
    Qty in Cart: 0
    Price:
    $71.99
    Subtotal:
  • 2000PK Coupling Replacement Part Kit

    2000PK Coupling Replacement Part Kit

    PREMIER

    $216.99
    2000PK Coupling Replacement Part Kit* High Quality Replacement Parts Kit* Includes: - Retaining Rings - Lock Nut - Spacer - Pin - Bolt - Latch And Latch Lock - Springs - Bushings* Made In USA* Sold...
    09-051100658
    SKU:
    09-051100658
    Truck Class:
    Universal
    Location:
    Made In USA
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $216.99
    Qty in Cart: 0
    Price:
    $216.99
    Subtotal:
  • 2200A Slack Reducing Coupling Kit

    2200A Slack Reducing Coupling Kit

    PREMIER

    $799.99
    2200A Slack Reducing Coupling Kit* High Quality Reducing Coupling Kit* Includes: - Coupling - Bolt Kit - Air Chamber - Air Chamber Adapter Bracket And Thimble* Max. Gross Trailer Weight 100000 Lbs.*...
    09-051100657
    SKU:
    09-051100657
    Rating:
    100000 LBS
    Truck Class:
    Universal
    Location:
    Made In USA
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $799.99
    Qty in Cart: 0
    Price:
    $799.99
    Subtotal:
  • 2200 Slack Reducing Coupling

    2200 Slack Reducing Coupling

    PREMIER

    $646.99
    2200 Slack Reducing Coupling* High Quality Reducing Coupling* Max. Gross Trailer Weight 100000 Lbs.* Max. Tongue Weight 20000 Lbs.* Ultimate Latch Capacity 60000 Lbs.* Max. Eye X-Section 1-13/16...
    09-051100656
    SKU:
    09-051100656
    Rating:
    100000 LBS
    Truck Class:
    Universal
    Location:
    Made In USA
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $646.99
    Qty in Cart: 0
    Price:
    $646.99
    Subtotal:
  • Air Adjusted Couplings Replacement Part Kit

    Air Adjusted Couplings Replacement Part Kit

    PREMIER

    $135.99
    Air Adjusted Couplings Replacement Part Kit* High Quality Couplings Replacement Parts Kit* Includes: - Spring - Thimble - Bolt - Locknut And Shoe* Made In USA* Sold Individually* Warranty On...
    09-051100649
    SKU:
    09-051100649
    Truck Class:
    Universal
    Location:
    Made In USA
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $135.99
    Qty in Cart: 0
    Price:
    $135.99
    Subtotal:
  • 100 Series SAF - Tite Slack Reducing Coupling Replacement Kit

    100 Series SAF - Tite Slack Reducing Coupling Replacement Kit

    PREMIER

    $123.99
    100 Series SAF - Tite Slack Reducing Coupling Replacement Kit* High Quality Couplings Replacement Parts Kit* Includes:  - Bolts - Locknuts - Latch And Latch Lock - Springs - Bushings* Made In USA*...
    09-051100648
    SKU:
    09-051100648
    Location:
    Made In USA
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $123.99
    Qty in Cart: 0
    Price:
    $123.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Outboard Spring Stop For Holland Center Section - Replaces XA-01586

    Outboard Spring Stop For Holland Center Section - Replaces XA-01586

    OPP - ORIGINAL PARTS PROGRAM

    $21.50
    Outboard Spring Stop For Holland Center Section* High Quality Outboard Spring Stop* For Holland Center Section * Made In USA* Sold Individually ** Warranty On Outboard Spring Stop Against Defects In...
    09-05110017
    SKU:
    09-05110017
    Position:
    Center
    Truck Class:
    Heavy Duty
    Color:
    Black
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $21.50
    Qty in Cart: 0
    Price:
    $21.50
    Subtotal:
  • FREE SHIPPING OVER $249
    Inboard Spring Stop For Holland Center Sections - Replaces XA-2501

    Inboard Spring Stop For Holland Center Sections - Replaces XA-2501

    OPP - ORIGINAL PARTS PROGRAM

    $8.29
    Inboard Spring Stop For Holland Center Sections* High Quality Inboard Spring Stop* For Holland Center Sections* Made In USA* Sold Individually ** Warranty On Inboard Spring Stop Against Defects In...
    09-05110016
    SKU:
    09-05110016
    Color:
    Black
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $8.29
    Qty in Cart: 0
    Price:
    $8.29
    Subtotal:
  • FREE SHIPPING OVER $249
    Holland Center Section Rebuild Components For Holland XA-2503

    Holland Center Section Rebuild Components For Holland XA-2503

    OPP - ORIGINAL PARTS PROGRAM

    $10.09
    Holland Center Section Rebuild Components* High Quality Holland Center Section Rebuild Components * Made Of Forged Steel * Heat Treated For Increased Durability * Material and Performance Tests...
    09-05110014
    SKU:
    09-05110014
    Truck Class:
    Heavy Duty
    Position:
    Center
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $10.09
    Qty in Cart: 0
    Price:
    $10.09
    Subtotal:
  • Oval Release Handle For Fontaine 5th Wheels

    Oval Release Handle For Fontaine 5th Wheels

    AUTOMANN USA

    $35.97
    Oval Release Handle For Fontaine 5th WheelsEnsure precise trailer operation with the Oval Release Handle For Fontaine 5th Wheels, a durable, high-quality handle built for consistent performance...
    09-05110013
    SKU:
    09-05110013
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $35.97
    Qty in Cart: 0
    Price:
    $35.97
    Subtotal:
  • FREE SHIPPING
    Minimizer Jost 5th Wheel Slick Plate Kit For Top Plate JSK37U

    Minimizer Jost 5th Wheel Slick Plate Kit For Top Plate JSK37U

    MINIMIZER

    $329.99
    Minimizer 5th Wheel Slick Plate 29.5 X 35.5Eliminated the need to grease your Fifth Wheel with this Minimizer Jost 5th Wheel Slick Plate. It features a non-stick polymer surface that provides an...
    09-05110011
    SKU:
    09-05110011
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $329.99
    Qty in Cart: 0
    Price:
    $329.99
    Subtotal:
  • FREE SHIPPING
    Jost 5th Wheel Bushing For Freightliner

    Jost 5th Wheel Bushing For Freightliner

    JOST

    $343.99
    Jost 5th Wheel Bushing Fits Freightliner* High Quality Bushing Kit* Fits Jost 5th Wheel* Rubber Bushing* Sold As A Kit* Warranty On Bushing Kits Against Defects In Workmanship & Material From Date Of...
    09-05110009
    SKU:
    09-05110009
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $343.99
    Qty in Cart: 0
    Price:
    $343.99
    Subtotal:
  • Jost 5th Wheel Top Plate Replacement - JSK37USL

    Jost 5th Wheel Top Plate Replacement - JSK37USL

    JOST

    $1,733.99
    JSK37H Replacement Top PlateJOST replacement top plates offer additional safety, security, and significant time and money in overall product cost. It features an easy-to-use pull handle to reduce...
    09-05110006
    SKU:
    09-05110006
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $1,733.99
    Qty in Cart: 0
    Price:
    $1,733.99
    Subtotal:
  • FREE SHIPPING OVER $249
    JOST 5th Wheel Adjusting Screw

    JOST 5th Wheel Adjusting Screw

    JOST

    $88.99
    5th Wheel Adjusting Screw* High Quality 5th Wheel Adjusting Screw* Sold Individually* Warranty On 5th Wheel Adjusting Screw Against Defects In Workmanship & Material From Date Of Purchase*** High...
    09-05110005
    SKU:
    09-05110005
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $88.99
    Qty in Cart: 0
    Price:
    $88.99
    Subtotal:
  • FREE SHIPPING OVER $249
    JOST 5th Wheel Hand Lever - Driver Side

    JOST 5th Wheel Hand Lever - Driver Side

    AUTOMANN USA

    $54.99
    Driver Side 5th Wheel LeverDepend on precise fifth wheel control with the JOST 5th Wheel Hand Lever - Driver Side. Designed for driver side pull operation, this durable hand lever ensures smooth...
    09-05110004
    SKU:
    09-05110004
    Truck Class:
    Heavy Duty
    Position:
    Driver Side
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $54.99
    Qty in Cart: 0
    Price:
    $54.99
    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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