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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
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  • Premier 507 Bolt Kit 200, 200L, 300, 480, 580, 590, 690 And 890C Couplings

    Premier 507 Bolt Kit 200, 200L, 300, 480, 580, 590, 690 And 890C Couplings

    PREMIER

    $62.99
    Premier 507 Bolt Kit* High Quality Bolt Kit* Includes   - (4) 2-3/4 Inch   - (4) Locknuts* Mounting Structure Thickness 1/2 Inch* For Use With 200. 200L. 300. 480. 580. 590. 690 And 890C Couplings*...
    09-051100889
    SKU:
    09-051100889
    Product Type:
    Frame & Chassis
    Location:
    Made In USA
    $62.99
    Qty in Cart: 0
    Price:
    $62.99
    Subtotal:
  • Premier 159 Bolt Kit For 150, 160 And 240 Couplings

    Premier 159 Bolt Kit For 150, 160 And 240 Couplings

    PREMIER

    $24.75
    Premier 159 Bolt Kit* High Quality Bolt Kit* Includes   - (4) 2 Inch Bolts  - (4) Lock Washers   - (4) Hex Nuts* Mounting Structure Thickness 3/4 Inch* For Use With 150. 160 And 240 Couplings* Has...
    09-051100893
    SKU:
    09-051100893
    Product Type:
    Frame & Chassis
    Location:
    Made In USA
    Make:
    Universal Items
    $24.75
    Qty in Cart: 0
    Price:
    $24.75
    Subtotal:
  • Premier 505 Bolt Kit For 770 Coupling

    Premier 505 Bolt Kit For 770 Coupling

    PREMIER

    $90.99
    Premier 505 Bolt Kit* High Quality Bolt Kit* Includes   - (5) 2-1/2- Inch Bolts   - (2) 2-3/4 Inch Bolts  - (7) Locknuts* Mounting Structure Thickness 1/2 Inch* For Use With 770 Coupling* Make The...
    09-051100888
    SKU:
    09-051100888
    Product Type:
    Frame & Chassis
    Location:
    Made In USA
    Make:
    Universal Items
    $90.99
    Qty in Cart: 0
    Price:
    $90.99
    Subtotal:
  • Premier 508 Bolt Kit For 470, 470H, 2400, 2400H, 100-4 And 100-4H Couplings

    Premier 508 Bolt Kit For 470, 470H, 2400, 2400H, 100-4 And 100-4H Couplings

    PREMIER

    $100.99
    Premier 508 Bolt Kit* High Quality Bolt Kit* Includes   - (6) 2-1/2 Inch Bolts  - (2) 2-3/4 Inch Bolts  - (8) Locknuts* Mounting Structure Thickness 1/2 Inch* For Use With 470. 470H. 2400. 2400H...
    09-051100890
    SKU:
    09-051100890
    Product Type:
    Frame & Chassis
    Location:
    Made In USA
    Make:
    Universal Items
    $100.99
    Qty in Cart: 0
    Price:
    $100.99
    Subtotal:
  • Fontaine Fifth Wheel Wedge Stop Rod Kit

    Fontaine Fifth Wheel Wedge Stop Rod Kit

    OPP - ORIGINAL PARTS PROGRAM

    $59.99
    Wedge Stop Rod Kit for NT, 6000, 7000, and 7000CC series Fontaine Fifth Wheel* High Quality Wedge Stop Rod Kit* Includes:  - Wedge Stop Rod  - Wedge Stop Rod Nut  - Washers  - Wedge Stop Rod Spring  ...
    09-05110089
    SKU:
    09-05110089
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Location:
    Made In USA
    $59.99
    Qty in Cart: 0
    Price:
    $59.99
    Subtotal:
  • Premier 501 Bolt Kit For 270, 2200 And 100 Couplings

    Premier 501 Bolt Kit For 270, 2200 And 100 Couplings

    PREMIER

    $52.99
    Bolt Kit For Coupling or Drawbar Eye installationPremier's individually packaged Bolt Kits simplify the hardware selection process for your Coupling or Drawbar Eye installation. Each kit includes...
    09-051100884
    SKU:
    09-051100884
    Location:
    Made In USA
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $52.99
    Qty in Cart: 0
    Price:
    $52.99
    Subtotal:
  • Premier 502 Bolt Kit 360, 370, 780, 2300 And 100-3 Couplings

    Premier 502 Bolt Kit 360, 370, 780, 2300 And 100-3 Couplings

    PREMIER

    $79.99
    Premier 502 Bolt Kit* High Quality Bolt Kit* Includes   - (4) 2-1/2 Inch Bolts  - (2) 2-3/4 Inch Bolts  - (6) Locknuts* Mounting Structure Thickness 1/2 Inch* For Use With 360. 370. 780. 2300 And...
    09-051100885
    SKU:
    09-051100885
    Product Type:
    Frame & Chassis
    Location:
    Made In USA
    Make:
    Universal Items
    $79.99
    Qty in Cart: 0
    Price:
    $79.99
    Subtotal:
  • Premier 504 Bolt Kit For 570 Coupling

    Premier 504 Bolt Kit For 570 Coupling

    PREMIER

    $74.99
    Premier 504 Bolt Kit* High Quality Bolt Kit* Includes   - (6) 2- Inch Bolts  - (6) Locknuts* Mounting Structure Thickness 1/2 Inch* For Use With 570 Coupling* Make The Hardware Selection For Your...
    09-051100887
    SKU:
    09-051100887
    Product Type:
    Frame & Chassis
    Location:
    Made In USA
    Make:
    Universal Items
    $74.99
    Qty in Cart: 0
    Price:
    $74.99
    Subtotal:
  • Fontaine No Slack Fifth Wheel Minor Jaw / Wedge Repair Kit

    Fontaine No Slack Fifth Wheel Minor Jaw / Wedge Repair Kit

    OPP - ORIGINAL PARTS PROGRAM

    $375.99
    No-Slack Fifth Wheel Head Minor Rebuild Kit* High Quality Minor Jaw/Wedge Repair Kit* Includes:   - Jaw/Wedge   - 3 Main Top Plate Springs  - Bushings  - Cotter Pin  - Lock Nuts* No Slack* Made In...
    09-05110087
    SKU:
    09-05110087
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Location:
    Made In USA
    $375.99
    Qty in Cart: 0
    Price:
    $375.99
    Subtotal:
  • Fontaine Release Pull Handle Kit, Driver Side

    Fontaine Release Pull Handle Kit, Driver Side

    OPP - ORIGINAL PARTS PROGRAM

    $59.99
    Fontaine Fifth Wheel Release Pull Handle Kit for NT, 6000, 7000, and 7000CC Series* High Quality Pull Handle Kit* Includes:   - Pull Handle   - Washer  - Cotter Pin* Made In USA* Sold Individually*...
    09-05110086
    SKU:
    09-05110086
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Location:
    Made In USA
    $59.99
    Qty in Cart: 0
    Price:
    $59.99
    Subtotal:
  • Premier 503 Bolt Kit For 127, 127F, 370B, 570, 580J And 2300B Couplings

    Premier 503 Bolt Kit For 127, 127F, 370B, 570, 580J And 2300B Couplings

    PREMIER

    $75.99
    Premier 503 Bolt Kit* High Quality Bolt Kit* Includes   - (6) 2-1/2 Inch Bolts  - (6) Locknuts* Mounting Structure Thickness 1/2 Inch* For Use With 127. 127F. 370B. 570. 580J And 2300B Couplings*...
    09-051100886
    SKU:
    09-051100886
    Product Type:
    Frame & Chassis
    Location:
    Made In USA
    Make:
    Universal Items
    $75.99
    Qty in Cart: 0
    Price:
    $75.99
    Subtotal:
  • Jam Nut 5/8 Inch -18NF

    Jam Nut 5/8 Inch -18NF

    MINIMIZER

    $6.34
    Jam Nut For Air Chamber Push Rod* High Quality Jam Nut* 5/8 Inch -18NF* To Secure Coupler To Air Chamber Push Rod* Made In USA* Sold Individually* Warranty On Jam Nuts Against Defects In Workmanship...
    09-051100883
    SKU:
    09-051100883
    Product Type:
    Frame & Chassis
    Diameter Options:
    5/8 Inch
    Location:
    Made In USA
    Make:
    Universal Items
    $6.34
    Qty in Cart: 0
    Price:
    $6.34
    Subtotal:
  • Repair Kit For 956BK Front End Housing

    Repair Kit For 956BK Front End Housing

    MINIMIZER

    $413.99
    956BK Front End Housing Repair Kit* High Quality Repair Kit* Includes   - Poly Bushings- 2 Pieces  - A Internal Polymer Washer  - B External Polymer Washer   - External Washer* Poly* Made In USA*...
    09-051100837
    SKU:
    09-051100837
    Product Type:
    Frame & Chassis
    Material Options:
    Plastic/Poly
    Location:
    Made In USA
    Make:
    Universal Items
    $413.99
    Qty in Cart: 0
    Price:
    $413.99
    Subtotal:
  • Fontaine Fifth Wheel Spring Kit

    Fontaine Fifth Wheel Spring Kit

    AUTOMANN USA

    $25.73
    Fontaine 6000 Series Manual Pull Spring Kit for Fifth Wheels* High Quality Spring Kit* (3) Springs Included* Made In USA* Sold Individually* Warranty On Spring Kits Against Defects In Workmanship &...
    09-05110088
    SKU:
    09-05110088
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    $25.73
    Qty in Cart: 0
    Price:
    $25.73
    Subtotal:
  • Front End Assembly With Drawbar Eye And Housing 307BK

    Front End Assembly With Drawbar Eye And Housing 307BK

    MINIMIZER

    $1,432.99
    Premier 956BK Front End Housing* High Quality Front End Assembly* Includes   - Drawbar Eye   - Front End Housing* Poly* Poly Bushed * Made In USA* Sold Individually* Warranty On Front End Assemblies...
    09-051100836
    SKU:
    09-051100836
    Product Type:
    Frame & Chassis
    Location:
    Made In USA
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    $1,432.99
    Qty in Cart: 0
    Price:
    $1,432.99
    Subtotal:
  • Fontaine Fifth Wheel Pin & Bushing Kit

    Fontaine Fifth Wheel Pin & Bushing Kit

    OPP - ORIGINAL PARTS PROGRAM

    $173.99
    Fontaine Fifth Wheel Pin & Bushing Kit* High Quality Pin And Bushing Kit* Includes:  - Bushings   - Bracket Pins  - Cotter Pins* Made In USA* Sold Individually* Warranty On Pin And Bushing Kits...
    09-05110085
    SKU:
    09-05110085
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Location:
    Made In USA
    Product Type:
    Frame & Chassis
    $173.99
    Qty in Cart: 0
    Price:
    $173.99
    Subtotal:
  • 2 Inch ID Washer For 235NT Coupling

    2 Inch ID Washer For 235NT Coupling

    PREMIER

    $27.06
    Replacement 2 Inch ID Washer* High Quality Replacement Washer* 2 Inch ID * For Use With 235NT Coupling* Made In USA* Sold Individually* Warranty On Replacement Washers Against Defects In Workmanship...
    09-051100734
    SKU:
    09-051100734
    Product Type:
    Frame & Chassis
    Diameter Options:
    2 Inch
    Location:
    Made In USA
    Make:
    Universal Items
    $27.06
    Qty in Cart: 0
    Price:
    $27.06
    Subtotal:
  • 335NTEL Coupling Replacement Parts Kit With Latch

    335NTEL Coupling Replacement Parts Kit With Latch

    PREMIER

    $245.99
    Replacement Parts Kit for 335NTEL Coupling* High Quality Replacement Parts Kit * Includes   - Pin  - Latch  - Springs  - Retaining Ring* Made In USA* Sold Individually* Warranty On Replacement Parts...
    09-051100741
    SKU:
    09-051100741
    Product Type:
    Frame & Chassis
    Location:
    Made In USA
    Make:
    Universal Items
    $245.99
    Qty in Cart: 0
    Price:
    $245.99
    Subtotal:
  • Fontaine Fifth Wheel Slide Bracket Poly Bushings With Liner

    Fontaine Fifth Wheel Slide Bracket Poly Bushings With Liner

    OPP - ORIGINAL PARTS PROGRAM

    $152.99
    Bushing Replacements Fontaine Fifth Wheel Slide Bracket* High Quality Bushing Setup* Includes:   - Upper/Lower Bushings   - Bracket Liner* Poly* Made In USA* Sold Individually* Warranty On Bushing...
    09-05110084
    SKU:
    09-05110084
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Location:
    Made In USA
    Material Options:
    Plastic/Poly
    $152.99
    Qty in Cart: 0
    Price:
    $152.99
    Subtotal:
  • Fontaine Fifth Wheel Slide Bracket Poly Bushing,

    Fontaine Fifth Wheel Slide Bracket Poly Bushing,

    OPP - ORIGINAL PARTS PROGRAM

    $76.99
    Bushing Replacement for Fontaine Fifth Wheel Slide Bracket* High Quality Bushing* Polyurethane* Dimensions:  - 4 Inch OD  - 1 1/4 Inch ID  - 2 1/4 Inch Height* Made In USA* Sold Individually*...
    09-05110083
    SKU:
    09-05110083
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Material Options:
    Plastic/Poly
    Location:
    Made In USA
    Height Options:
    2 Inch
    $76.99
    Qty in Cart: 0
    Price:
    $76.99
    Subtotal:
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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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