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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
  • Leaf Spring Repair Plate 2-1/2 X 0.401- 60 Inch OAL W/ 6 Inch Arch

    Leaf Spring Repair Plate 2-1/2 X 0.401- 60 Inch OAL W/ 6 Inch Arch

    AFTERMARKET

    $75.99
    Spring Steel Repair Plate With No Center Hole* High Quality Repair Plate* Dimensions:  - 2 1/2 Inch Plate Width  - 0.401 Inch Plate Thickness  - 60 Inch Overall Length  - 5.187 Inch Arch* Repair...
    29-05100234
    SKU:
    29-05100234
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $75.99
    Qty in Cart: 0
    Price:
    $75.99
    Subtotal:
  • End Beam Bushing 2 1/2 ID X 4 3/8 OD X 5 3/4 Inch For Hendrickson Rear

    End Beam Bushing 2 1/2 ID X 4 3/8 OD X 5 3/4 Inch For Hendrickson Rear

    AFTERMARKET

    $85.99
    Beam End Bush Replaces 29878-001L, F184244* High Quality Bushing* Rubber* Dimensions:  - 2-1/2 Inch ID  - 4-3/8 Inch OD   - 5-3/4 Inch Length* With 4-1/4 Inch Sleeve* Made In USA* Sold Individually*...
    29-05100188
    SKU:
    29-05100188
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Length Options:
    5 3/4 Inch
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $85.99
    Qty in Cart: 0
    Price:
    $85.99
    Subtotal:
  • 4 Leaf Lift Axle Spring - 26 Inch 2,600 Lb. Capacity

    4 Leaf Lift Axle Spring - 26 Inch 2,600 Lb. Capacity

    AFTERMARKET

    $258.99
    Leaf Spring Assembly - 4 Leaves* High Quality Lift Axle Spring* 4 Leaf* Made In USA* Sold Individually* Warranty On Lift Axle Springs Against Defects In Workmanship & Material From Date Of...
    29-05200003
    SKU:
    29-05200003
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $258.99
    Qty in Cart: 0
    Price:
    $258.99
    Subtotal:
  • Rear Rebound Roller - 58631-000. 58631000 For Hendrickson

    Rear Rebound Roller - 58631-000. 58631000 For Hendrickson

    AUTOMANN USA

    $8.80
    3.25 Inch Hendrickson Rebound Roller* High Quality Rebound Roller* Dimensions:  - 3.25 Inch Length  - 1.07 Inch O.D.  - 0.535 Inch I.D.* Made In USA* Sold Individually* Warranty On Rebound Rollers...
    29-05100179
    SKU:
    29-05100179
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $8.80
    Qty in Cart: 0
    Price:
    $8.80
    Subtotal:
  • Leaf Spring Repair Plate 15/32 CBH 2.5 X 0.323 - 60 Inch OAL W/ 5.187 Inch Arch

    Leaf Spring Repair Plate 15/32 CBH 2.5 X 0.323 - 60 Inch OAL W/ 5.187 Inch Arch

    AFTERMARKET

    $61.99
    Leaf Spring Repair Plate 15/32 CBH* High Quality Repair Plate* Dimensions:  - 2 1/2 Inch Plate Width  - 0.323 Inch Plate Thickness  - 30 Inch Divided Length A And B  - 60 Inch Overall Length  - 5.187...
    29-05100227
    SKU:
    29-05100227
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $61.99
    Qty in Cart: 0
    Price:
    $61.99
    Subtotal:
  • Center Bushing With Welded Plug For Hendrickson 380-480 Series W/ T-Rods

    Center Bushing With Welded Plug For Hendrickson 380-480 Series W/ T-Rods

    AFTERMARKET

    $165.99
    Hendrickson Center Bushing Replaces 5919-000, F184204* High Quality Bushing* Dimensions:  - 2 1/2 Inch ID   - 4.75 Inch OD   - 12 Inch Length* Welded Plug* Made In USA* Sold Individually* Warranty On...
    29-05100186
    SKU:
    29-05100186
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Length Options:
    12 Inch
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $165.99
    Qty in Cart: 0
    Price:
    $165.99
    Subtotal:
  • Rear Single Leaf Radius Rod Replaces 52229, 53096, 8086648 For Volvo VNL Gen II 2004 - 2006

    Rear Single Leaf Radius Rod Replaces 52229, 53096, 8086648 For Volvo VNL Gen II 2004 - 2006

    AFTERMARKET

    $184.99
    Tapered Leaf Spring Assembly w/ Radius RodEnsure smooth, controlled rear axle movement with the Rear Single Leaf Radius Rod. This high-quality single-leaf rod helps maintain proper suspension...
    29-05100142
    SKU:
    29-05100142
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $184.99
    Qty in Cart: 0
    Price:
    $184.99
    Subtotal:
  • Rear 12 Leaf Spring 12/PD - 15,500 Lbs. Capacity

    Rear 12 Leaf Spring 12/PD - 15,500 Lbs. Capacity

    AFTERMARKET

    $919.99
    Rear Leaf Spring 12/PD - 12 Leaves* High Quality Leaf Spring* 4 Inch Width* 17 1/16 Inch S.E.* 28 3/4 Inch I.E.* 2-3/4 Inch Arch* Spring Type- Multi Leaf Spring* Spring Eye-1* Number Of Leaves- 12*...
    29-05100152
    SKU:
    29-05100152
    Product Type:
    Frame & Chassis
    $919.99
    Qty in Cart: 0
    Price:
    $919.99
    Subtotal:
  • Rear Load Cushion - 60 Durometer For Hendrickson RS 340-400 Series

    Rear Load Cushion - 60 Durometer For Hendrickson RS 340-400 Series

    AFTERMARKET

    $185.99
    Hendrickson Load Cushion Suspension* High Quality Load Cushion* Dimensions:  - 3 Inch Hole Size  - 3.937 Inch Height  - 12 Inch Overall Length* 60 Durometer* Made In USA* Sold Individually* Warranty...
    29-05100137
    SKU:
    29-05100137
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $185.99
    Qty in Cart: 0
    Price:
    $185.99
    Subtotal:
  • Rear Load Cushion Kit With Tie-Bars & Weight Bias For Hendrickson Haulmaxx

    Rear Load Cushion Kit With Tie-Bars & Weight Bias For Hendrickson Haulmaxx

    AFTERMARKET

    $236.99
    Hendrickson Haulmaxx Load Cushion Kit With Tie-Bar Bolsters* High Quality Load Cushion Kit* With Tie-Bar Bolsters* One Set* Weight Bias Kit* Made In USA* Sold Individually* Warranty On Load Cushion...
    29-05100138
    SKU:
    29-05100138
    Material Options:
    Plastic/Poly
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $236.99
    Qty in Cart: 0
    Price:
    $236.99
    Subtotal:
  • Rear 12 Leaf Spring - 15,500 Lbs. Capacity For Hendrickson

    Rear 12 Leaf Spring - 15,500 Lbs. Capacity For Hendrickson

    AFTERMARKET

    $835.99
    Rear Leaf Spring - 12 Leaves Replaces 45068* High Quality Leaf Spring* 4 Inch Width * 17 1/16 Inch S.E.* 20 11/16 Inch L.E.* 3 1/4 Inch Arch* Spring Type- Multi- Leaf Spring* Spring Eye- 1* Number Of...
    29-05100130
    SKU:
    29-05100130
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $835.99
    Qty in Cart: 0
    Price:
    $835.99
    Subtotal:
  • Rear 12 Leaf Spring - 20,000 Lbs. Capacity For Hendrickson

    Rear 12 Leaf Spring - 20,000 Lbs. Capacity For Hendrickson

    AFTERMARKET

    $775.99
    Rear Leaf Spring - 12 Leaves Replaces 45322, 45322000, 4Qk3371* High Quality Leaf Spring* 4 Inch Width* 17 Inch S.E.* 28 1/2 Inch L.E.* 2 1/8 Inch Arch* Spring Type- Multi- Leaf Spring* Spring Eye-...
    29-05100127
    SKU:
    29-05100127
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $775.99
    Qty in Cart: 0
    Price:
    $775.99
    Subtotal:
  • Bump Stop Bushing 90 MM OD X 92 MM OAL

    Bump Stop Bushing 90 MM OD X 92 MM OAL

    DAYTON / DORMAN

    $46.47
    Leaf Spring Bumper Replaces 15574846 And 8155748460This leaf spring bumper undergoes rigorous testing to ensure a reliable replacement for the original equipment on specific vehicles. You can use it...
    29-05250051
    SKU:
    29-05250051
    Material Options:
    Plastic/Poly
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $46.47
    Qty in Cart: 0
    Price:
    $46.47
    Subtotal:
  • Center Beam Bushing 2.5 ID X 4 .75 OD X 12 Inch

    Center Beam Bushing 2.5 ID X 4 .75 OD X 12 Inch

    AFTERMARKET

    $201.99
    Center Beam Bushing With End Loose Plug* High Quality Bushing* Dimensions:  - 2.5 Inch ID   - 4.75 Inch OD  - 12 Inch Length* Includes Bushing End Loose Plug* Made In USA* Sold Individually* Warranty...
    29-05100190
    SKU:
    29-05100190
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Length Options:
    12 Inch
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $201.99
    Qty in Cart: 0
    Price:
    $201.99
    Subtotal:
  • Front 2 Leaf Parabolic Spring PD/2 - 6,600 Lbs. Capacity For Kenworth, Peterbilt

    Front 2 Leaf Parabolic Spring PD/2 - 6,600 Lbs. Capacity For Kenworth, Peterbilt

    AUTOMANN USA

    $619.99
    Kenworth & Peterbilt Front Leaf Parabolic Spring - 2 Leaves Replaces Part Number B81-6013-003Ensure your truck's front suspension operates at peak performance with this Front 2 Leaf Parabolic Spring,...
    29-05090193
    SKU:
    29-05090193
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Peterbilt
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $619.99
    Qty in Cart: 0
    Price:
    $619.99
    Subtotal:
  • End Beam Bushing 2-1/2 Inch ID x 4-3/8 Inch OD x 5-1/4 Inch

    End Beam Bushing 2-1/2 Inch ID x 4-3/8 Inch OD x 5-1/4 Inch

    AFTERMARKET

    $89.99
    Hendrickson End Beam Bushing* High Quality Beam Bushing* Rubber* Dimensions:  - 2 1/2 Inch ID   - 4 3/8 Inch OD   - 5 1/4 Length  - 3 1/2 Inch Sleeve* Made In USA* Sold Individually* Warranty On Beam...
    29-05100184
    SKU:
    29-05100184
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $89.99
    Qty in Cart: 0
    Price:
    $89.99
    Subtotal:
  • Rear Load Cushion - 70 Durometer For Hendrickson RS 460-520/ 650/ 850/100/1200 Series.

    Rear Load Cushion - 70 Durometer For Hendrickson RS 460-520/ 650/ 850/100/1200 Series.

    AFTERMARKET

    $150.99
    Hendrickson Load Cushion Suspension* High Quality Load Cushion* Dimensions:  - 3.00 Inch Hole Size   - 3.937 Inch Height  - 12.00 Inch Overall Length* 70 Durometer* Made In USA* Sold Individually*...
    29-05100139
    SKU:
    29-05100139
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $150.99
    Qty in Cart: 0
    Price:
    $150.99
    Subtotal:
  • Rear 12 Leaf Spring 12/PD - 25,000 Lbs. Capacity

    Rear 12 Leaf Spring 12/PD - 25,000 Lbs. Capacity

    AFTERMARKET

    $778.99
    Rear 12 Leaf Spring 12/PD* High Quality Leaf Spring* 4 Inch Width* 17 Inch S.E.* 20 3/8 Inch L.E.* 2 13/16 Inch Arch* Spring Type- Multi-Leaf Spring* Number Of Leaves- 12* Capacity- 25000* Bronze...
    29-05100133
    SKU:
    29-05100133
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $778.99
    Qty in Cart: 0
    Price:
    $778.99
    Subtotal:
  • Rear 10 Leaf Spring - 15,500 lbs. Capacity For Hendrickson

    Rear 10 Leaf Spring - 15,500 lbs. Capacity For Hendrickson

    AFTERMARKET

    $626.99
    Hendrickson Leaf Spring -10 Leaves Replaces Part 45027* High Quality Leaf Spring* 4 Inch Width* 17 1/16 Inch S.E.* 20 11/16 Inch L.E.* 3-1/4 Inch Arch* Spring Eye- 1* Number Of Leaves- 10* Capacity-...
    29-05100125
    SKU:
    29-05100125
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $626.99
    Qty in Cart: 0
    Price:
    $626.99
    Subtotal:
  • Rear 12 Leaf Spring 12/PD - 47057, 350033804, 85102483 For Hendrickson

    Rear 12 Leaf Spring 12/PD - 47057, 350033804, 85102483 For Hendrickson

    AFTERMARKET

    $822.99
    Hendrickson Tandem Two RT & RT2 Rear Multi-Leaf SpringThe Hendrickson Leaf Spring replaces the tandem suspensions on RT and RT2 with 33-inch hanger spacing. It has 12 leaves plus a pad and a capacity...
    29-05100004
    SKU:
    29-05100004
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $822.99
    Qty in Cart: 0
    Price:
    $822.99
    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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