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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
  • 60.50 Inch Cross Tube - 2 In OD, 1-1/8 In-12 Ends Replaces 1006732

    60.50 Inch Cross Tube - 2 In OD, 1-1/8 In-12 Ends Replaces 1006732

    AFTERMARKET

    $173.99
    60.50 Inch C To C Cross Tube Replaces 1006732* High Quality Cross Tube* 1-1/8 Inch-12 I.D.* 2.00 Inch O.D.* 60.50 Inch Length* Made In USA* Sold Individually * Warranty On Cross Tubes Against Defects...
    29-05090138
    SKU:
    29-05090138
    Material Options:
    Steel
    Length Options:
    60 1/2 Inch
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $173.99
    Qty in Cart: 0
    Price:
    $173.99
    Subtotal:
  • 58.12 Inch Cross Tube - 1.75 In OD, 1-1/8 In-12 Ends Replaces A3102V3454

    58.12 Inch Cross Tube - 1.75 In OD, 1-1/8 In-12 Ends Replaces A3102V3454

    AFTERMARKET

    $197.99
    58.12 Inch C To C Cross Tube Replaces A3102V3454* High Quality Cross Tube* 58.12 Inch Length* 1.75 Inch OD* 1-1/8 Inch-12 ID* Made In USA* Sold Individually* Warranty On Cross Tubes Against Defects...
    29-05090117
    SKU:
    29-05090117
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Length Options:
    58 Inch
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $197.99
    Qty in Cart: 0
    Price:
    $197.99
    Subtotal:
  • 17.625 Inch Fixed Torque Rod W/ Blank 1-1/4 Inch Dia. Shaft Replaces 90045540

    17.625 Inch Fixed Torque Rod W/ Blank 1-1/4 Inch Dia. Shaft Replaces 90045540

    AFTERMARKET

    $217.99
    17.625 Inch Torque Rod W/ Blank Shaft Replaces 90045540* High Quality Torque Rod* Includes  - Torque Rod Bushing - Apex Bushing  - Torque Rod Blank* 1-1/4 Inch Shaft Diameter* 17-5/8 Inch C To C*...
    29-05090135
    SKU:
    29-05090135
    Truck Class:
    Heavy Duty
    Length Options:
    17 5/8 Inch
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $217.99
    Qty in Cart: 0
    Price:
    $217.99
    Subtotal:
  • 60.60 Inch Cross Tube - 1.50 In OD, 1-1/8 In-12 Ends Replaces 339TR119

    60.60 Inch Cross Tube - 1.50 In OD, 1-1/8 In-12 Ends Replaces 339TR119

    AFTERMARKET

    $206.99
    60.60 Inch C To C Cross Tube Replaces 339TR119* High Quality Cross Tube* 60.60 Inch Length* 1.50 Inch OD* 1-1/8 Inch-12 ID* Made In USA* Sold Individually* Warranty On Cross Tubes Against Defects In...
    29-05090113
    SKU:
    29-05090113
    Length Options:
    60 Inch
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $206.99
    Qty in Cart: 0
    Price:
    $206.99
    Subtotal:
  • 20 Inch Adjustable Torque Rod, 1-1/4 Inch Replaces 90045537

    20 Inch Adjustable Torque Rod, 1-1/4 Inch Replaces 90045537

    AFTERMARKET

    $336.99
    20.00 Inch C To C Torque Rod Replaces 90045537* High Quality Torque Rod * 20.00 Inch C To C* Shaft Diameter- 1-1/4 Inch* (2) Torque Rod Bushing* Side A And B- Straddle* Side A Angle 5 Degrees* Side B...
    29-05090132
    SKU:
    29-05090132
    Length Options:
    20 Inch
    Material Options:
    Plastic/Poly
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $336.99
    Qty in Cart: 0
    Price:
    $336.99
    Subtotal:
  • 53.63 Inch Cross Tube - 1.50 In OD, 1-1/8 In-12 Ends Replaces 120TR108

    53.63 Inch Cross Tube - 1.50 In OD, 1-1/8 In-12 Ends Replaces 120TR108

    AFTERMARKET

    $167.99
    53.625 Inch C To C Cross Tube Replaces 120TR108 5C4Z3280AA, 5C4Z3280BB, 5C5O3280AA,1668403C91* High Quality Cross Tube* 1.50 Inch OD* 53.63 Inch Length* 1-1/8 Inch-12 ID* Made In USA* Sold...
    29-05090111
    SKU:
    29-05090111
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Length Options:
    53 Inch
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $167.99
    Qty in Cart: 0
    Price:
    $167.99
    Subtotal:
  • 62.875 Inch Cross Tube - 1.9 In OD, 1-1/4 In-12 Ends Replaces A3102N4460

    62.875 Inch Cross Tube - 1.9 In OD, 1-1/4 In-12 Ends Replaces A3102N4460

    AFTERMARKET

    $207.99
    62.875 Inch C To C Cross Tube Replaces A3102N4460* High Quality Cross Tube* 62.875 Inch Length* 1.90 Inch O.D.* 1-1/4 Inch-12 I.D.* Made In USA* Sold Individually* Warranty On Cross Tubes Against...
    29-05090128
    SKU:
    29-05090128
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Length Options:
    63 Inch
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $207.99
    Qty in Cart: 0
    Price:
    $207.99
    Subtotal:
  • 46.25 Inch Cross Tube - 2 In OD, 1-5/8 In-12 Ends Replaces 971097

    46.25 Inch Cross Tube - 2 In OD, 1-5/8 In-12 Ends Replaces 971097

    AFTERMARKET

    $302.99
    46.25 Inch C To C Cross Tube Replaces 971097* High Quality Cross Tube* 46.25 Inch Length* 2.00 Inch O.D.* 1-5/8 Inch-12 I.D.* Made In USA* Sold Individually* Warranty On Cross Tubes Against Defects...
    29-05090126
    SKU:
    29-05090126
    Length Options:
    46 Inch
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $302.99
    Qty in Cart: 0
    Price:
    $302.99
    Subtotal:
  • 52 Inch Cross Tube - 2 In OD, 1-1/4 In-12 Ends Replaces 820632

    52 Inch Cross Tube - 2 In OD, 1-1/4 In-12 Ends Replaces 820632

    AFTERMARKET

    $293.99
    52 Inch C To C Cross Tube Replaces 820632* High Quality Cross Tube* 52 Inch Length* 2.00 Inch O.D.* 1-1/4 Inch-12 I.D.* Made In USA* Sold Individually* Warranty On Cross Tubes Against Defects In...
    29-05090124
    SKU:
    29-05090124
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Length Options:
    52 Inch
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $293.99
    Qty in Cart: 0
    Price:
    $293.99
    Subtotal:
  • 51.42 Inch Cross Tube - 1.75 In OD, 1-1/4 In-12 Ends Replaces A3102R4282

    51.42 Inch Cross Tube - 1.75 In OD, 1-1/4 In-12 Ends Replaces A3102R4282

    AFTERMARKET

    $162.99
    51.42 Inch C To C Cross Tube Replaces A3102R4282* High Quality Cross Tube* 51.42 Inch Length* 1.75 Inch OD* 1-1/4 Inch-12 ID* Made In USA* Sold Individually* Warranty On Cross Tubes Against Defects...
    29-05090122
    SKU:
    29-05090122
    Length Options:
    51 1/2 Inch
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $162.99
    Qty in Cart: 0
    Price:
    $162.99
    Subtotal:
  • 59.25 Inch Cross Tube - 1-1/4 In OD, 1 In-16 Ends Replaces A3102B1978

    59.25 Inch Cross Tube - 1-1/4 In OD, 1 In-16 Ends Replaces A3102B1978

    AFTERMARKET

    $189.99
    59.25 Inch C To C Cross Tube Replaces A3102B1978* High Quality Cross Tube* 1-1/4 Inch OD * 59-1/4 Inch Overall Length* 1.0 Inch-16 Ends* Made In USA* Sold Individually* Warranty On Cross Tubes...
    29-05090109
    SKU:
    29-05090109
    Length Options:
    59 Inch
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $189.99
    Qty in Cart: 0
    Price:
    $189.99
    Subtotal:
  • 58 Inch Cross Tube - 1.75 In OD, 1-1/4 In-12 Ends Replaces 818818

    58 Inch Cross Tube - 1.75 In OD, 1-1/4 In-12 Ends Replaces 818818

    AFTERMARKET

    $207.99
    58 Inch C To C Cross Tube Replaces 818818* High Quality Cross Tube* 58.00 Inch Length* 1.75 Inch OD* 1-1/4 Inch-12 ID* Made In USA* Sold Individually* Warranty On Cross Tubes Against Defects In...
    29-05090120
    SKU:
    29-05090120
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $207.99
    Qty in Cart: 0
    Price:
    $207.99
    Subtotal:
  • 62.25 Inch Cross Tube - 1.75 In OD, 1-1/4 In-12 Ends Replaces A3102R4438

    62.25 Inch Cross Tube - 1.75 In OD, 1-1/4 In-12 Ends Replaces A3102R4438

    AFTERMARKET

    $195.99
    62.25 Inch C To C Cross Tube Replaces A3102R4438* High Quality Cross Tube* 62.25 Inch Length* 1.75 Inch OD* 1-1/4 Inch-12 ID* Made In USA* Sold Individually* Warranty On Cross Tubes Against Defects...
    29-05090118
    SKU:
    29-05090118
    Truck Class:
    Heavy Duty
    Length Options:
    62 1/4 Inch
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $195.99
    Qty in Cart: 0
    Price:
    $195.99
    Subtotal:
  • 47.50 Inch Cross Tube - 2.5 In OD, 1-7/8 In -12 Ends Replaces A3102K4457

    47.50 Inch Cross Tube - 2.5 In OD, 1-7/8 In -12 Ends Replaces A3102K4457

    AFTERMARKET

    $560.99
    47.50 Inch C To C Cross Tube Replaces A3102K4457* High Quality Cross Tube* 2.50 Inch OD * 47.5 Inch Length * With 1-7/8 Inch-12 Ends* Made In USA* Sold Individually* Warranty On Cross Tubes Against...
    29-05090105
    SKU:
    29-05090105
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $560.99
    Qty in Cart: 0
    Price:
    $560.99
    Subtotal:
  • 57 Inch Cross Tube - 1.50 In OD, 1-1/8 In-12 Ends Replaces A3102T3452

    57 Inch Cross Tube - 1.50 In OD, 1-1/8 In-12 Ends Replaces A3102T3452

    AFTERMARKET

    $158.99
    57 Inch C To C Cross Tube Replaces A3102T3452* High Quality Cross Tube* 57.00 Inch Length* 1.50 Inch O.D.* 1-1/8 Inch-12 I.D.* Made In USA* Sold Individually* Warranty On Cross Tubes Against Defects...
    29-05090114
    SKU:
    29-05090114
    Material Options:
    Steel
    Length Options:
    57 Inch
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $158.99
    Qty in Cart: 0
    Price:
    $158.99
    Subtotal:
  • 60.56 Inch Cross Tube - 1.50 In OD, 1-1/8 In-12 Ends Replaces 120TR107

    60.56 Inch Cross Tube - 1.50 In OD, 1-1/8 In-12 Ends Replaces 120TR107

    AFTERMARKET

    $150.99
    60.56 Inch C To C Cross Tube Replaces 120TR107* High Quality Cross Tube* 60.56 Inch Length* 1.50 Inch OD* 1-1/8 Inch-12 ID* Made In USA* Sold Individually* Warranty On Cross Tubes Against Defects In...
    29-05090112
    SKU:
    29-05090112
    Truck Class:
    Universal
    Length Options:
    60 Inch
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $150.99
    Qty in Cart: 0
    Price:
    $150.99
    Subtotal:
  • 58.50 Inch Cross Tube - 1-1/2 In OD, 1-1/8 In -12 Ends Replaces A3102X3456

    58.50 Inch Cross Tube - 1-1/2 In OD, 1-1/8 In -12 Ends Replaces A3102X3456

    AFTERMARKET

    $158.99
    58.50 Inch C To C Cross Tube Replaces A3102X3456, L18RT0699A11Upgrade your truck's suspension components with this 58.50 Inch Cross Tube, designed to replace part number A3102X3456, L18RT0699A11...
    29-05090110
    SKU:
    29-05090110
    Material Options:
    Steel
    Length Options:
    58 1/2 Inch
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $158.99
    Qty in Cart: 0
    Price:
    $158.99
    Subtotal:
  • 59.38 Inch Cross Tube - 1.5 In OD, 1-1/8 In-12 Ends Replaces 120TR106

    59.38 Inch Cross Tube - 1.5 In OD, 1-1/8 In-12 Ends Replaces 120TR106

    AFTERMARKET

    $150.99
    59.38 Inch C To C Cross Tube Replaces 120TR106* High Quality Cross Tube* 59.38 Inch Length* 1.50 Inch O.D.* 1-1/8 Inch-12 I.D.* Made In USA* Sold Individually* Warranty On Cross Tubes Against Defects...
    29-05090108
    SKU:
    29-05090108
    Truck Class:
    Heavy Duty
    Length Options:
    59 Inch
    Material Options:
    Steel
    Product Type:
    Frame & Chassis
    $150.99
    Qty in Cart: 0
    Price:
    $150.99
    Subtotal:
  • 53.50 Inch Cross Tube - 2 In OD, 1-1/4 In-12 Ends Replaces A3102Z3874

    53.50 Inch Cross Tube - 2 In OD, 1-1/4 In-12 Ends Replaces A3102Z3874

    AFTERMARKET

    $261.99
    53.50 Inch C To C Cross Tube Replaces A3102Z3874* High Quality Cross Tube* 2.00 Inch OD * 53.50 Inch Length * With 1-1/4 Inch -12 Ends* Made In USA* Sold Individually* Warranty On Cross Tubes Against...
    29-05090104
    SKU:
    29-05090104
    Length Options:
    53 Inch
    Material Options:
    Steel
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $261.99
    Qty in Cart: 0
    Price:
    $261.99
    Subtotal:
  • 62.25 Inch Cross Tube - 2 In OD, 1-1/8 In-12 Ends Replaces A3102Y3483

    62.25 Inch Cross Tube - 2 In OD, 1-1/8 In-12 Ends Replaces A3102Y3483

    AFTERMARKET

    $190.99
    62.25 Inch C To C Cross Tube Replaces A3102Y3483* High Quality Cross Tube* 62.25 Inch Length* 2.00 Inch OD* 1-1/8 Inch-12* Made In USA* Sold Individually* Warranty On Cross Tubes Against Defects In...
    29-05090106
    SKU:
    29-05090106
    Truck Class:
    Universal
    Length Options:
    62 1/4 Inch
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $190.99
    Qty in Cart: 0
    Price:
    $190.99
    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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