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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
  • Steering Tie Rod End 1-1/4 -12- Driver Side

    Steering Tie Rod End 1-1/4 -12- Driver Side

    AFTERMARKET

    $57.99
    Driver Side Steering Tie Rod End 1-1/4 -12Maintain precise steering control with the Steering Tie Rod End 1 1/4-12 for the driver side, engineered for durability and reliable performance. Designed...
    29-05200014
    SKU:
    29-05200014
    Truck Class:
    Heavy Duty
    Length Options:
    7 1/2 Inch
    Material Options:
    Steel
    Product Type:
    Frame & Chassis
    $57.99
    Qty in Cart: 0
    Price:
    $57.99
    Subtotal:
  • Steering Tie Rod End 1-1/4 - 12- Passenger Side

    Steering Tie Rod End 1-1/4 - 12- Passenger Side

    AFTERMARKET

    $57.99
    Passenger Side Steering Tie Rod End 1-1/4 - 12Ensure precise steering and reliable handling with the Steering Tie Rod End 1-1/4-12 for the passenger side. Featuring a 1.25-inch-12 right-hand stud and...
    29-05200015
    SKU:
    29-05200015
    Truck Class:
    Heavy Duty
    Length Options:
    7 1/2 Inch
    Material Options:
    Steel
    Product Type:
    Frame & Chassis
    $57.99
    Qty in Cart: 0
    Price:
    $57.99
    Subtotal:
  • BESTfit Camshaft Bushing 1.5 ID X 1.89 OD X 1.25 Inch - 820183

    BESTfit Camshaft Bushing 1.5 ID X 1.89 OD X 1.25 Inch - 820183

    BESTFIT TRUCK PARTS

    $1.14
    BESTfit 1.5 ID X 1.89 OD X 1.25 Inch Camshaft Bushing* High Quality Camshaft Bushing* Nylon* Dimensions:  - 1.50 Inch ID - 1.89 Inch OD - 1.25 Inch Length* Sold Individually* Warranty On Camshaft...
    29-05170013
    SKU:
    29-05170013
    Material Options:
    Plastic/Poly
    Truck Class:
    Heavy Duty
    Diameter Options:
    1 1/2 Inch
    Product Type:
    Frame & Chassis
    $1.14
    Qty in Cart: 0
    Price:
    $1.14
    Subtotal:
  • Round U Bolt Kit 7/8-14 X 3 X 14-1/2 Inch Grade 8

    Round U Bolt Kit 7/8-14 X 3 X 14-1/2 Inch Grade 8

    AFTERMARKET

    $54.99
    Round Bend 7/8 Inch Diameter U Bolt KitKeep your truck's suspension properly mounted with the Round U-Bolt Kit 7/8-14 x 3 x 14-1/2 Inch Grade 8. Featuring two U-bolts, four U-bolt washers, and four...
    29-05100158
    SKU:
    29-05100158
    Truck Class:
    Heavy Duty
    Length Options:
    14 1/2 Inch
    Material Options:
    Steel
    Product Type:
    Frame & Chassis
    $54.99
    Qty in Cart: 0
    Price:
    $54.99
    Subtotal:
  • Square U Bolt Kit 3/4 X 4 X 5-3/4 Inch

    Square U Bolt Kit 3/4 X 4 X 5-3/4 Inch

    AUTOMANN USA

    $28.07
    Square Bend 3/4 Inch Diameter U Bolt KitSecure your suspension system with the Square U Bolt Kit 3/4 X 4 X 5-3/4 Inch. This comprehensive kit includes two U bolts, four washers, and four deep nuts,...
    29-0510024
    SKU:
    29-0510024
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    $28.07
    Qty in Cart: 0
    Price:
    $28.07
    Subtotal:
  • Round Bend U Bolt Kit 3/4 Inch-16 X 3 X 12 5/8 Inch

    Round Bend U Bolt Kit 3/4 Inch-16 X 3 X 12 5/8 Inch

    AFTERMARKET

    $34.54
    3/4 Inch Diameter U-Bolt KitThe U Bolt Kit includes 2 U-bolts with a 3-inch rounded top, 12 5/8-inch legs, and 3/4-inch-16 threaded ends. It replaces part numbers SP00750105, EUB8151-12, 1630010,...
    29-05100156
    SKU:
    29-05100156
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    $34.54
    Qty in Cart: 0
    Price:
    $34.54
    Subtotal:
  • Steering Tie Rod End 1-3/8-12 Passenger Side - 080TR117

    Steering Tie Rod End 1-3/8-12 Passenger Side - 080TR117

    AFTERMARKET

    $130.99
    Passenger Side Steering Tie Rod End 1-3/8-12 Replaces 080TR117* High Quality Tie Rod End* Height Of Taper- 2.382 Inch * 11.89 In C To End* 1-3/8-12 In Stud* Taper Minor Diameter- 0.762 Inch* Taper...
    29-05090073
    SKU:
    29-05090073
    Truck Class:
    Heavy Duty
    Length Options:
    11 5/8 Inch
    Material Options:
    Steel
    Product Type:
    Frame & Chassis
    $130.99
    Qty in Cart: 0
    Price:
    $130.99
    Subtotal:
  • Round U Bolt Kit 7/8-14 X 3 X 12-1/2 Inch Grade 8

    Round U Bolt Kit 7/8-14 X 3 X 12-1/2 Inch Grade 8

    AFTERMARKET

    $50.99
    Round Bend 7/8 Inch Diameter U Bolt Kit* High Quality U Bolt Kit * Consists Of  - (2) U-Bolts - (4) U-bolt Washer  - (4) Deep Nut* 7/8 Inch-14 * 12 1/2 Inch Length* Made In USA * Sold Individually*...
    29-05100157
    SKU:
    29-05100157
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Product Type:
    Frame & Chassis
    $50.99
    Qty in Cart: 0
    Price:
    $50.99
    Subtotal:
  • Steering Tie Rod End 1-1/8-12 Passenger Side 12548108

    Steering Tie Rod End 1-1/8-12 Passenger Side 12548108

    AFTERMARKET

    $97.99
    Passenger Side Steering Tie Rod End 1-1/8-12 Replaces 12548108* High Quality Tie Rod End* Height Of Taper- 2.421 Inch * 5.44 In C To End* 1-1/8-12 In Stud* Taper Minor Diameter- 1.038 Inch* Taper...
    29-05090075
    SKU:
    29-05090075
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Product Type:
    Frame & Chassis
    $97.99
    Qty in Cart: 0
    Price:
    $97.99
    Subtotal:
  • Steering Tie Rod End 1-1/4-12 Passenger Side- 590584C91

    Steering Tie Rod End 1-1/4-12 Passenger Side- 590584C91

    AFTERMARKET

    $61.99
    Passenger Side Steering Tie Rod End 1-1/4-12* High Quality Tie Rod End* Height Of Taper- 2.60 Inch* 7.50 In C To End* 1-1/4-12 In Stud* Passenger Side* Made In USA * Sold Individually* Warranty On...
    29-05090069
    SKU:
    29-05090069
    Material Options:
    Steel
    Length Options:
    7 1/2 Inch
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    $61.99
    Qty in Cart: 0
    Price:
    $61.99
    Subtotal:
  • Steering Tie Rod End 1-1/8-12 Driver Side - 00128175

    Steering Tie Rod End 1-1/8-12 Driver Side - 00128175

    AFTERMARKET

    $77.99
    Driver Side Steering Tie Rod End 1-1/8-12 Replaces 00128175* High Quality Tie Rod End* Height Of Taper- 2.382 Inch * 6.00 In C To End* 1-1/8-12 In Stud* Taper Minor Diameter- 0.967 Inch* Taper Major...
    29-05090071
    SKU:
    29-05090071
    Truck Class:
    Heavy Duty
    Length Options:
    6 Inch
    Product Type:
    Frame & Chassis
    $77.99
    Qty in Cart: 0
    Price:
    $77.99
    Subtotal:
  • BESTfit Steering Tie Rod End 1 -16 OD Passenger Side - D5TZ3A131A

    BESTfit Steering Tie Rod End 1 -16 OD Passenger Side - D5TZ3A131A

    BESTFIT TRUCK PARTS

    $43.89
    Passenger Side Steering Tie Rod End 1 -16 OD* High Quality Tie Rod End* Dimensions: - 6.07 Inch Length C To End - 1.00 Inch-16* Passenger Side* Made In USA * Sold Individually* Warranty On Tie Rod...
    29-05090065
    SKU:
    29-05090065
    Material Options:
    Steel
    Length Options:
    6 Inch
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    $43.89
    Qty in Cart: 0
    Price:
    $43.89
    Subtotal:
  • Steering Tie Rod End 1-3/8-12 Driver Side - 080TR116

    Steering Tie Rod End 1-3/8-12 Driver Side - 080TR116

    AFTERMARKET

    $150.99
    Driver Side Steering Tie Rod End 1-3/8-12 Replaces 080TR116* High Quality Tie Rod End* Height Of Taper- 2.382 Inch * 11.89 In C To End* 1-3/8-12 In Stud* Taper Minor Diameter- 0.762 Inch* Taper Major...
    29-05090072
    SKU:
    29-05090072
    Truck Class:
    Heavy Duty
    Length Options:
    11 5/8 Inch
    Material Options:
    Steel
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $150.99
    Qty in Cart: 0
    Price:
    $150.99
    Subtotal:
  • Cross Tube 1-1/8 -12 ID X 1.66 OD X 60 Inch - R 817020

    Cross Tube 1-1/8 -12 ID X 1.66 OD X 60 Inch - R 817020

    AFTERMARKET

    $130.99
    60 Inch Cross Tube Replaces R 817020* High Quality Cross Tube* Dimensions: - 1-1/8 Inch-12 ID  - 1.66 Inch OD  - 60 Inch Length* Made In USA * Sold Individually* Warranty On Cross Tubes Against...
    29-05090050
    SKU:
    29-05090050
    Material Options:
    Steel
    Length Options:
    60 Inch
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    $130.99
    Qty in Cart: 0
    Price:
    $130.99
    Subtotal:
  • Driver Side Steering Tie Rod End 1-7/8-12 Replaces 85108888

    Driver Side Steering Tie Rod End 1-7/8-12 Replaces 85108888

    AFTERMARKET

    $103.99
    Steering Tie Rod End 1-7/8-12- Driver SideThe driver side steering tie rod end delivers reliable control and durability. Replacing 85108888, it offers a 1-7/8-12 stud, minor 1.08-inch taper, and 12...
    29-05090067
    SKU:
    29-05090067
    Material Options:
    Steel
    Length Options:
    12 5/8 Inch
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    $103.99
    Qty in Cart: 0
    Price:
    $103.99
    Subtotal:
  • Steering Tie Rod End 1-1/4-12 Driver Side Replaces 590583C91

    Steering Tie Rod End 1-1/4-12 Driver Side Replaces 590583C91

    AFTERMARKET

    $59.99
    Driver Side Steering Tie Rod End 1-1/4-12Achieve smooth, responsive steering with the Steering Tie Rod End 1-1/4-12 Driver Side. Built for long-term durability, it features a 2.60-inch taper, 7...
    29-05090068
    SKU:
    29-05090068
    Material Options:
    Steel
    Length Options:
    7 1/2 Inch
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    $59.99
    Qty in Cart: 0
    Price:
    $59.99
    Subtotal:
  • Steering Tie Rod End 1-1/4 Inch-12 OD Passenger Side -Replaces A3144Y1091, 1139031

    Steering Tie Rod End 1-1/4 Inch-12 OD Passenger Side -Replaces A3144Y1091, 1139031

    AFTERMARKET

    $104.99
    Passenger Side Steering Tie Rod End 1-1/4 Inch-12 OD Replaces A3144Y1091, 1139031Keep your truck's steering responsive with the Steering Tie Rod End 1-1/4 Inch-12 OD Passenger Side. Featuring...
    29-05090040
    SKU:
    29-05090040
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Product Type:
    Frame & Chassis
    $104.99
    Qty in Cart: 0
    Price:
    $104.99
    Subtotal:
  • Deep Nut 3/4- 16 X 1-1/16 Inch Grade 8

    Deep Nut 3/4- 16 X 1-1/16 Inch Grade 8

    AUTOMANN USA

    $25.54
    Grade 8 Deep Nut 3/4- 16 X 1-1/16 Inch* High Quality Deep Nut* Dimensions: - Diameter- 1.062 Inch - Height- 1.00 Inch* Threads: 0.75 Inch- 16 TPI * Sold As Pack* Warranty On Deep Nuts Against Defects...
    29-05250012
    SKU:
    29-05250012
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Diameter Options:
    1 Inch
    Product Type:
    Frame & Chassis
    $25.54
    Qty in Cart: 0
    Price:
    $25.54
    Subtotal:
  • On Sale
    Limited Quantity Available
    King Pin Bushing 1.798 ID, 1.925 OD, 1.5 Inch Replaces R210088

    King Pin Bushing 1.798 ID, 1.925 OD, 1.5 Inch Replaces R210088

    AUTOMANN USA

    Now: $21.64
    Was: $30.92
    King Pin Bushing Replaces 1225W985, R210088, 5351010, And 1804004Built for performance and longevity, this High-Quality King Pin Bushing replacing R210088 helps keep your front suspension working...
    29-05090054
    SKU:
    29-05090054
    Material Options:
    Bronze
    Truck Class:
    Heavy Duty
    Diameter Options:
    2 Inch
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    Now: $21.64
    Was: $30.92
    Qty in Cart: 0
    Price:
    Now: $21.64
    Was: $30.92
    Subtotal:
  • Cross Tube 1-1/8 -12 ID X 1.75 OD X 59.37 Inch - 1006144

    Cross Tube 1-1/8 -12 ID X 1.75 OD X 59.37 Inch - 1006144

    AFTERMARKET

    $175.99
    59.37 Inch Cross Tube Replaces 1006144, E9957, D0HZ3281A, 002915, R002915, 1697445C91, A3102F4348, A3102K4379, A3102N3472, R250398, DS1379S, And 85105932* High Quality Cross Tube* Dimensions: - 1-1/8...
    29-05200008
    SKU:
    29-05200008
    Truck Class:
    Heavy Duty
    Length Options:
    59 Inch
    Material Options:
    Steel
    Product Type:
    Frame & Chassis
    $175.99
    Qty in Cart: 0
    Price:
    $175.99
    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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