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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
  • 3 Inch Poly Rear Silent Block Spring Bushing Replaces 6803220150 For Flex Air Models, Spring Eye

    3 Inch Poly Rear Silent Block Spring Bushing Replaces 6803220150 For Flex Air Models, Spring Eye

    AFTERMARKET

    $88.99
    Poly Silent Block Bushing Replaces 51880, 51880-000, C136002, C13-6002, K2215089, K221-5089Restore suspension efficiency with this 3 Inch Poly Rear Silent Block Spring Bushing. Designed for Flex Air...
    29-05100233
    SKU:
    29-05100233
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $88.99
    Qty in Cart: 0
    Price:
    $88.99
    Subtotal:
  • 4.615 Inch Poly Equalizer Bushing For Hendrickson Rear

    4.615 Inch Poly Equalizer Bushing For Hendrickson Rear

    AFTERMARKET

    $88.99
    Equalizer Bushing Replaces 48932000* High Quality Equalizer* Poly* Dimensions:  - 4.615 Inch Length  - 2.75 Inch O.D.  - 0.875 Inch I.D.* Made In USA* Sold Individually* Warranty On Equalizers...
    29-05100222
    SKU:
    29-05100222
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $88.99
    Qty in Cart: 0
    Price:
    $88.99
    Subtotal:
  • 5 1/4 Inch End Beam Bushing Assembly For Hendrickson 340 Series

    5 1/4 Inch End Beam Bushing Assembly For Hendrickson 340 Series

    AFTERMARKET

    $124.99
    End Beam Bushing Assembly* High Quality End Beam Bushing Assembly* Consists Of   - (1) End Beam Bushing   - (1) Adapter Kit* 5 1/4 Inch* Made In USA* Sold Individually* Warranty On End Beam Bushing...
    29-05100281
    SKU:
    29-05100281
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $124.99
    Qty in Cart: 0
    Price:
    $124.99
    Subtotal:
  • 5 1/4 Inch End Beam Bushing Assembly For Hendrickson Rear 340-460 Series

    5 1/4 Inch End Beam Bushing Assembly For Hendrickson Rear 340-460 Series

    AFTERMARKET

    $115.99
    End Beam Bushing Assembly* High Quality End Beam Bushing Assembly* Consists Of   - (1) End Beam Bushing   - (1) Adapter Kit* 5 1/4 Inch* Made In USA* Sold Individually* Warranty On End Beam Bushing...
    29-05100282
    SKU:
    29-05100282
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $115.99
    Qty in Cart: 0
    Price:
    $115.99
    Subtotal:
  • Bi Metal King Pin Bushing 1.79 ID X 1.92 OD X 2.8 Inch OAL

    Bi Metal King Pin Bushing 1.79 ID X 1.92 OD X 2.8 Inch OAL

    AUTOMANN USA

    $21.61
    Ball Indented & Grooved Long Type King Pin Bushing Replaces 45F1079, 88912095, E-4545, E4545, 1225-D-836, 1225D836, R210082, 5351079, Bk265* High Quality King Pin Bushing* Bi Metal* Dimensions:  - 1...
    29-05091219
    SKU:
    29-05091219
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Diameter Options:
    1 1/2 Inch
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $21.61
    Qty in Cart: 0
    Price:
    $21.61
    Subtotal:
  • Axle Seat Stud 5/8 Inch-11 Thread X 3.968 Inch For Hendrickson

    Axle Seat Stud 5/8 Inch-11 Thread X 3.968 Inch For Hendrickson

    AUTOMANN USA

    $5.07
    3.968 Inch Seat Axle Stud Hendrickson* High Quality Stud Axle Seat* 3.968 Inch Length* Thread 5/8 Inch-11* Sold Individually* Warranty On Stud Axle Seats Against Defects In Workmanship & Material...
    29-05100237
    SKU:
    29-05100237
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $5.07
    Qty in Cart: 0
    Price:
    $5.07
    Subtotal:
  • Rear 2nd Leaf Spring - 05118621AA 9043201606

    Rear 2nd Leaf Spring - 05118621AA 9043201606

    AFTERMARKET

    $220.99
    Rear 2nd Leaf Spring 70 X 15 665 X 665* High Quality 2nd Leaf* Made In USA* Sold Individually* Warranty On 2Nd Leafs Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...
    29-05100253
    SKU:
    29-05100253
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $220.99
    Qty in Cart: 0
    Price:
    $220.99
    Subtotal:
  • Poly Collar and Pivot Alignment Bushing Kit - 60632-019 For Hendrickson Rear

    Poly Collar and Pivot Alignment Bushing Kit - 60632-019 For Hendrickson Rear

    AFTERMARKET

    $137.99
    Replacement Hendrickson Alignment-Collar Kit* High Quality Pivot Bushing Kit* Kit Includes:  - (1) Pivot Bushing Poly Split   - (1) Concentric Collar  - (1) Eccentric Collar  - (1) Bolt Dacromet...
    29-05100215
    SKU:
    29-05100215
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $137.99
    Qty in Cart: 0
    Price:
    $137.99
    Subtotal:
  • Bi Metal King Pin Bushing 1.78 ID X 1.92 OD X 2.65 Inch OAL

    Bi Metal King Pin Bushing 1.78 ID X 1.92 OD X 2.65 Inch OAL

    AUTOMANN USA

    $21.61
    Bi Metal Ball Indented & Grooved King Pin Bushing Replaces R210047, E-4554, 20-0179* High Quality King Pin Bushing* Bi Metal* Dimensions:  - 1.78 Inch ID  - 1.925 Inch OD  - 2.65 Inch Length*...
    29-05091220
    SKU:
    29-05091220
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Diameter Options:
    1 3/4 Inch
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $21.61
    Qty in Cart: 0
    Price:
    $21.61
    Subtotal:
  • Bi Metal King Pin Bushing 1.87 ID X 2.054 OD X 1.81 Inch OAL

    Bi Metal King Pin Bushing 1.87 ID X 2.054 OD X 1.81 Inch OAL

    AFTERMARKET

    $64.99
    Bi Metal Ball Indented & Grooved King Pin Bushing Replaces 1460Hd100, 2509748C1* High Quality King Pin Bushing* Dimensions:  - 1.870 Inch ID   - 2.054 Inch OD   - 1.810 Inch Length* Sold...
    29-05091222
    SKU:
    29-05091222
    Material Options:
    Steel
    Diameter Options:
    1 1/2 Inch
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $64.99
    Qty in Cart: 0
    Price:
    $64.99
    Subtotal:
  • Bi Metal King Pin Bushing 1.81 ID X 1.94 OD X 2.24 Inch OAL

    Bi Metal King Pin Bushing 1.81 ID X 1.94 OD X 2.24 Inch OAL

    AUTOMANN USA

    $17.80
    Bi Metal Ball Indented & Grooved King Pin Bushing Replaces R-003345, E4564, 5351049* High Quality King Pin Bushing* Bi Metal* Dimensions:  - 1.81 Inch ID  - 1.940 Inch OD  - 2.24 Inch Length*...
    29-05091221
    SKU:
    29-05091221
    Diameter Options:
    1 1/2 Inch
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $17.80
    Qty in Cart: 0
    Price:
    $17.80
    Subtotal:
  • Bi Metal King Pin Bushing 2.17 ID X 2.17 OD X 2.5 Inch OAL

    Bi Metal King Pin Bushing 2.17 ID X 2.17 OD X 2.5 Inch OAL

    AUTOMANN USA

    $22.89
    Bi Metal Ball Indented & Grooved King Pin Bushing Replaces 88912127, E10194, R210109, 45F1111, 1668226C1, Fak7448* High Quality King Pin Bushing* Bi Metal* Dimensions:  - 2.04 Inch ID  - 2.17 Inch...
    29-05091216
    SKU:
    29-05091216
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Diameter Options:
    2 Inch
    Make:
    International
    Product Type:
    Frame & Chassis
    $22.89
    Qty in Cart: 0
    Price:
    $22.89
    Subtotal:
  • 1.99 ID X 2.13 OD X 2.63 Inch OAL Bi-Metal King Pin Bushing

    1.99 ID X 2.13 OD X 2.63 Inch OAL Bi-Metal King Pin Bushing

    AUTOMANN USA

    $22.88
    Bi-Metal Ball Indented & Grooved King Pin Bushing Replaces 1225L818, R210085, 5351085, Bk276Maintain axle alignment and king pin durability with this Bi-Metal King Pin Bushing, measuring 1.99 inches...
    29-05091217
    SKU:
    29-05091217
    Diameter Options:
    2 Inch
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $22.88
    Qty in Cart: 0
    Price:
    $22.88
    Subtotal:
  • 1.63 ID X 1.75 OD X 1.93 Inch OAL Bi Metal King Pin Bushing

    1.63 ID X 1.75 OD X 1.93 Inch OAL Bi Metal King Pin Bushing

    AUTOMANN USA

    $15.26
    Bi Metal Ball Indented & Grooved King Pin Bushing Replaces E10192, E4531, R210102Take control of suspension repairs with this 1.63 ID x 1.75 OD x 1.93 Inch Bi Metal King Pin Bushing. Built to endure...
    29-05091218
    SKU:
    29-05091218
    Material Options:
    Steel
    Diameter Options:
    1 1/2 Inch
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $15.26
    Qty in Cart: 0
    Price:
    $15.26
    Subtotal:
  • Bushing Tool For TRB6185ME Bushing

    Bushing Tool For TRB6185ME Bushing

    AFTERMARKET

    $79.99
    Removal And Installation Bushing Tool* High Quality Bushing Tool* Dimensions:  - 2.98 Inch Length  - 2.25 Inch ID  - 2.48 Inch OD* Sold Individually* Warranty On Bushing Tools Against Defects In...
    09-05250126
    SKU:
    09-05250126
    Length Options:
    3 Inch
    Material Options:
    Steel
    Diameter Options:
    1 1/4 Inch
    Truck Class:
    Heavy Duty
    Make:
    Freightliner
    Make:
    Mack
    Make:
    Bus
    Make:
    Hino
    Make:
    International
    Make:
    Peterbilt
    Make:
    Ford
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $79.99
    Qty in Cart: 0
    Price:
    $79.99
    Subtotal:
  • Differential Pinion Nut M50 X 2 Thread X 2.943 Inch A/F

    Differential Pinion Nut M50 X 2 Thread X 2.943 Inch A/F

    AUTOMANN USA

    $29.23
    Differential Pinion Nut Replaces 1670303C1, 40X1145, And TDA40X1145* High Quality Differential Pinion Nut* 2.943 Inch A/F* Sold Individually* Warranty On Differential Pinion Nuts Against Defects In...
    09-05210027
    SKU:
    09-05210027
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $29.23
    Qty in Cart: 0
    Price:
    $29.23
    Subtotal:
  • TPHD Type 24 Long Stroke Air Brake Diaphragm - 7 Inch OD

    TPHD Type 24 Long Stroke Air Brake Diaphragm - 7 Inch OD

    TURNPIKE TRUCK TRIM

    $11.44
    Replacement 7 Inch Air Chamber Diaphragm - Type 24* High Quality Diaphragm* Dimensions:  - 2.05 Inch Height  - 7.0 Inch Outer Diameter * Type 24* Sold Individually* Warranty On Diaphragms Against...
    09-05170265
    SKU:
    09-05170265
    Diameter Options:
    7 Inch
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $11.44
    Qty in Cart: 0
    Price:
    $11.44
    Subtotal:
  • TPHD Type 24 Air Brake Diaphragm - 7 Inch OD

    TPHD Type 24 Air Brake Diaphragm - 7 Inch OD

    TURNPIKE TRUCK TRIM

    $5.06
    Replacement 7 Inch Air Chamber Diaphragm - Type 24* High Quality Diaphragm* Dimensions:  - 1.315 Inch Height  - 7 Inch Outer Diameter* Type 24* Sold Individually* Warranty On Diaphragms Against...
    09-05170257
    SKU:
    09-05170257
    Diameter Options:
    7 Inch
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $5.06
    Qty in Cart: 0
    Price:
    $5.06
    Subtotal:
  • Differential Pinion Nut M32 X 1.5 Thread X 1.812 Inch A/F

    Differential Pinion Nut M32 X 1.5 Thread X 1.812 Inch A/F

    AUTOMANN USA

    $26.98
    Differential Pinion Nut Replaces 40X1240, TDA40X1240Keep your differential assembly safe and stable with the Differential Pinion Nut M32 x 1.5 Thread. Featuring 1.812-inch A/F and 2.25-inch O.D.,...
    09-05210029
    SKU:
    09-05210029
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $26.98
    Qty in Cart: 0
    Price:
    $26.98
    Subtotal:
  • 24 Inch Fifth Wheel Graphite Lube Disk W/ Steel Retention Ring

    24 Inch Fifth Wheel Graphite Lube Disk W/ Steel Retention Ring

    AFTERMARKET

    $68.99
    Fifth Wheel Graphite Lube DiskEnhance your towing experience with the 24 Inch Fifth Wheel Graphite Lube Disk with Steel Retention Ring. This graphite lube disk ensures consistent lubrication,...
    09-05110035
    SKU:
    09-05110035
    Truck Class:
    Heavy Duty
    Diameter Options:
    24 Inch
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $68.99
    Qty in Cart: 0
    Price:
    $68.99
    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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