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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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  • Bulldog HD Steer Axle Shock Absorber Replaces 1266009B000 For Kenworth W900L W/ Ridewell, Neway Suspensions

    Bulldog HD Steer Axle Shock Absorber Replaces 1266009B000 For Kenworth W900L W/ Ridewell, Neway Suspensions

    BULLDOG HD SHOCKS

    $45.76
    Bulldog Steer Axle Shock Absorber Fits Kenworth W900L W/ Ridewell, Neway Suspensions - Replaces 1266009B000Ensure your truck has a smoother ride for a longer time with Bulldog HD Shocks. The shocks...
    29-050021
    SKU:
    29-050021
    Truck Class:
    Heavy Duty
    Length Options:
    18 Inch
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $45.76
    Qty in Cart: 0
    Price:
    $45.76
    Subtotal:
  • FREE SHIPPING OVER $249
    Load-Share Shock Bolt With Shoulder Used In Front Air Ride Kits

    Load-Share Shock Bolt With Shoulder Used In Front Air Ride Kits

    LOAD-SHARE SUSPENSIONS

    $60.99
    Shock BoltLooking for a reliable shock bolt for your front air ride kit or other projects? Check out our 3/4-inch Shock Bolt with Shoulder! It's the perfect fit for securely mounting shocks with ease...
    29-050007
    SKU:
    29-050007
    Width Options:
    3/4 Inch
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $60.99
    Qty in Cart: 0
    Price:
    $60.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Shock Bushing 1.5 Inch Od X 3/4 Inch ID

    Shock Bushing 1.5 Inch Od X 3/4 Inch ID

    ENERGY SUSPENSION

    $4.07
    Shock Bushing* High Quality Shock Bushing* Made Of Polyurethane* 1/2 Hour Glass, 1-1/2 Inch O.D. X 3/4 Inch I.D. * 4 Pieces* Pack Of 4, One Package Per Shock* Sold Individually* Made In USA* Warranty...
    29-050001
    SKU:
    29-050001
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Diameter Options:
    1 1/2 Inch
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $4.07
    Qty in Cart: 0
    Price:
    $4.07
    Subtotal:
  • Bulldog HD Rear Shock Absorber Replaces 20782199, 3626571C1, 60657-003, 665816 For IHC, Kenworth, Mack, Volvo

    Bulldog HD Rear Shock Absorber Replaces 20782199, 3626571C1, 60657-003, 665816 For IHC, Kenworth, Mack, Volvo

    BULLDOG HD SHOCKS

    $84.99
    Shock Absorber Fits International HV, Kenworth T680, T880, Mack TD700, Volvo VHD & VNLTake control of your IHC, Kenworth, Mack, or Volvo truck's suspension with the Bulldog HD Rear Shock Absorber,...
    29-050000033
    SKU:
    29-050000033
    Truck Class:
    Heavy Duty
    Length Options:
    24 Inch
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $84.99
    Qty in Cart: 0
    Price:
    $84.99
    Subtotal:
  • Bulldog HD Rear Shock Absorber 12.05 Comp. Length, 6.77 Inch Stroke Replaces 1091379, 3199949, 3199980, 3919949 For Peterbilt, Kenworth

    Bulldog HD Rear Shock Absorber 12.05 Comp. Length, 6.77 Inch Stroke Replaces 1091379, 3199949, 3199980, 3919949 For Peterbilt, Kenworth

    BULLDOG HD SHOCKS

    $49.17
    Shock Absorber Fits Peterbilt 367, 386, 587, Kenworth K100, T300-T450, T2000, T600, T800 & W900Bulldog HD shocks are fleet tested and approved. This is a premium rear replacement shock reengineered...
    29-050000028
    SKU:
    29-050000028
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Make:
    Peterbilt
    Product Type:
    Frame & Chassis
    Material Options:
    Steel
    Diameter Options:
    2 Inch
    Finish Options:
    Chrome-Plated
    Length Options:
    19 Inch
    Ready To Ship:
    Yes
    $49.17
    Qty in Cart: 0
    Price:
    $49.17
    Subtotal:
  • Bulldog HD Cab Shock Absorber, 11.89 Comp. Length, 6.89 Inch Stroke Replaces 1091379, 3199949, 3199980, 3919949 For PACCAR

    Bulldog HD Cab Shock Absorber, 11.89 Comp. Length, 6.89 Inch Stroke Replaces 1091379, 3199949, 3199980, 3919949 For PACCAR

    BULLDOG HD SHOCKS

    $72.99
    Heavy Duty Shock Absorber Fits Peterbilt & KenworthBulldog HD shocks are fleet tested and approved. This is a premium rear replacement shock reengineered to be better than the factory part that came...
    29-050000026
    SKU:
    29-050000026
    Truck Class:
    Heavy Duty
    Length Options:
    18 Inch
    Make:
    Kenworth
    Make:
    Peterbilt
    Product Type:
    Frame & Chassis
    $72.99
    Qty in Cart: 0
    Price:
    $72.99
    Subtotal:
  • Bulldog HD Front Shock Absorber For PACCAR W990, 330, 357, 362, 378, 379, 384, 385, 386

    Bulldog HD Front Shock Absorber For PACCAR W990, 330, 357, 362, 378, 379, 384, 385, 386

    BULLDOG HD SHOCKS

    $71.99
    HD Shock Absorber Replaces 2021459, 306444C91, 308646C91, 308668C92, 308669C91, 320444C91, 329316C92Find premium shock replacements for your truck at 4 State Trucks. We carry these front Bulldog...
    29-050000023
    SKU:
    29-050000023
    Truck Class:
    Heavy Duty
    Length Options:
    20 Inch
    Make:
    Peterbilt
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $71.99
    Qty in Cart: 0
    Price:
    $71.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Bulldog HD Front Shock Absorber Replaces 1613957000 For Kenworth, Peterbilt

    Bulldog HD Front Shock Absorber Replaces 1613957000 For Kenworth, Peterbilt

    BULLDOG HD SHOCKS

    $69.99
    Commercial Grade Heavy Duty Shock Absorber Fits PACCAR T2000, T400, T600, T660, T700, T800, 385 & 587Find premium shock replacements for your truck at 4 State Trucks. We carry these front Bulldog...
    29-050000018
    SKU:
    29-050000018
    Truck Class:
    Heavy Duty
    Length Options:
    25 Inch
    Make:
    Peterbilt
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $69.99
    Qty in Cart: 0
    Price:
    $69.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Bulldog HD Commercial Grade Tag Axle Steering Damper For Kenworth T880

    Bulldog HD Commercial Grade Tag Axle Steering Damper For Kenworth T880

    BULLDOG HD SHOCKS

    $93.99
    Commercial Grade Heavy Duty Steering DamperBulldog HD shocks are fleet tested and approved. This premium non-adjustable replacement tag axle shock is reengineered to be better than the factory part...
    29-050000014
    SKU:
    29-050000014
    Truck Class:
    Heavy Duty
    Length Options:
    22 Inch
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $93.99
    Qty in Cart: 0
    Price:
    $93.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Bulldog HD Rear Shock Absorber Replaces 14QK3101M, 14QK2136M, 20897198

    Bulldog HD Rear Shock Absorber Replaces 14QK3101M, 14QK2136M, 20897198

    BULLDOG HD SHOCKS

    $79.99
    Commercial Grade Heavy Duty Shock Absorber - Replaces 21462382, 22202559, 222202560 & 471700009647Bulldog HD shocks are fleet tested and approved. This is a premium rear replacement shock...
    29-050000012
    SKU:
    29-050000012
    Truck Class:
    Heavy Duty
    Length Options:
    24 Inch
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $79.99
    Qty in Cart: 0
    Price:
    $79.99
    Subtotal:
  • Bulldog HD Shock Absorber With Double Lip Seal Design, 11.5 Inch Comp. Length, 5.47 Stroke

    Bulldog HD Shock Absorber With Double Lip Seal Design, 11.5 Inch Comp. Length, 5.47 Stroke

    BULLDOG HD SHOCKS

    $50.99
    Commercial Grade Heavy Duty Shock AbsorberGet premium shocks for your Truck at 4 State Trucks! Replace your old shocks that came with your truck and trailer with Bulldog HD shocks. This shock has a...
    29-050000008
    SKU:
    29-050000008
    Truck Class:
    Heavy Duty
    Length Options:
    16 Inch
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $50.99
    Qty in Cart: 0
    Price:
    $50.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Shock Bushing 1.75 Inch OD X 1 Inch ID - Pack Of 4

    Shock Bushing 1.75 Inch OD X 1 Inch ID - Pack Of 4

    ENERGY SUSPENSION

    $8.52
    Bushings For Shocks* High Quality Shock Absorber Bushings* Made Of Polyurethane * 1/2 Hour Glass, 1-3/4 Inch O.D. X 1 Inch I.D. * Pack Of 4, One Package Per Shock* Sold Individually* Made In USA*...
    29-050000
    SKU:
    29-050000
    Color:
    Red
    Truck Class:
    Universal
    Location:
    Made In USA
    Diameter Options:
    1 Inch
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $8.52
    Qty in Cart: 0
    Price:
    $8.52
    Subtotal:
  • TPHD E6 Dual Circuit Foot Brake Valve W/ 3/8 Inch NPT-Female, 2-Bolt Mounting & 2 Supply Ports

    TPHD E6 Dual Circuit Foot Brake Valve W/ 3/8 Inch NPT-Female, 2-Bolt Mounting & 2 Supply Ports

    AFTERMARKET

    $103.99
    E6 Foot Brake Air Valve W/ 6 Delivery Ports & 0 PSI Crack Pressure By TPHDThe TPHD E6 Dual Circuit Foot Brake Valve is engineered to provide superior braking control and reliability for heavy-duty...
    286171
    SKU:
    286171
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Air, Electrical, & Safety
    $103.99
    Qty in Cart: 0
    Price:
    $103.99
    Subtotal:
  • Push-Pull Valve W/ 20 PSI Release Pressure

    Push-Pull Valve W/ 20 PSI Release Pressure

    AUTOMANN USA

    $19.96
    PP1 Type Push-Pull Valve* High Quality Push Pull Valve* PP1 Type* Release Pressure Is 20 PSI* Sold Individually** Warranty On Push Pull Valves Against Defects In Workmanship & Material From Date Of...
    276566AM
    SKU:
    276566AM
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    $19.96
    Qty in Cart: 0
    Price:
    $19.96
    Subtotal:
  • 40 PSI Push-Pull Valve W/ Anti-Compounding Release

    40 PSI Push-Pull Valve W/ Anti-Compounding Release

    AUTOMANN USA

    $42.04
    PP2 Type Push-Pull Valve W/ Anti-Compounding Release* High Quality Push Pull Valve* Pp2 Type*1/8 Inch NPT* With Anti-Compounding Release Pressure Is 40 PSI* Sold Individually** Warranty On Push Pull...
    275250AM
    SKU:
    275250AM
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    $42.04
    Qty in Cart: 0
    Price:
    $42.04
    Subtotal:
  • FREE SHIPPING OVER $249
    Jost Fifth Wheel King Pin - Replaces KZ1012

    Jost Fifth Wheel King Pin - Replaces KZ1012

    AUTOMANN USA

    $185.99
    Replacement King Pin JostKeep your trailer securely connected with the Jost Fifth Wheel King Pin, a precision-engineered replacement for KZ1012. With a 2.0-inch shank and 10.240-inch length, it meets...
    19-0510515
    SKU:
    19-0510515
    Truck Class:
    Heavy Duty
    Width Options:
    10 Inch
    Make:
    Trailer
    Product Type:
    Frame & Chassis
    $185.99
    Qty in Cart: 0
    Price:
    $185.99
    Subtotal:
  • Aluminum Replacement Door For Merritt 319 & 320 Base Cab Racks

    Aluminum Replacement Door For Merritt 319 & 320 Base Cab Racks

    MERRITT

    $917.99
    Merritt 319 & 320 Aluminum Replacement Door* High Quality Replacement Door * Made Of Aluminum* Sold Individual* Made In USA* Warranty On Replacement Door Against Defects In Workmanship & Material...
    10243
    SKU:
    10243
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Product Type:
    Cargo Control
    $917.99
    Qty in Cart: 0
    Price:
    $917.99
    Subtotal:
  • Merritt Center Door Replacement For 3700 Series Northern Light Diamond Plate Cab Racks

    Merritt Center Door Replacement For 3700 Series Northern Light Diamond Plate Cab Racks

    MERRITT

    $389.99
    Diamond Plate Center Door Replacement W/ T Latch* High Quality Center Door Replacement* Diamond Plate * Has T Latch* Sold Individually* Warranty On Center Door Replacement Against Defects In...
    10200
    SKU:
    10200
    Truck Class:
    Heavy Duty
    Position:
    Center
    Make:
    Universal Items
    Material Options:
    Aluminum
    Finish Options:
    Diamond Plate
    Product Type:
    Cargo Control
    $389.99
    Qty in Cart: 0
    Price:
    $389.99
    Subtotal:
  • 48 Inch Under-Body Glow Light Bracket W/ 12 Bulkhead 3/4 Inch Light Holes

    48 Inch Under-Body Glow Light Bracket W/ 12 Bulkhead 3/4 Inch Light Holes

    IOWA CUSTOMS

    $131.99
    48 Inch Underbody Glow Light Bracket W/ 12 - 3/4 Inch Bulkhead Light Hole Cutouts* High Quality Under-Body Glow Light Bracket* Under Body Glos Light Bracket* 48 Inch With 12 Bulkhead 3/4 Inch Light...
    09-1610095
    SKU:
    09-1610095
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Lighting
    $131.99
    Qty in Cart: 0
    Price:
    $131.99
    Subtotal:
  • SS 24 Foot Frame GLO Bracket Kit W/ Brackets & Hardware To Clamp 12 Foot Of GLO Brackets On Each Side Of Frame

    SS 24 Foot Frame GLO Bracket Kit W/ Brackets & Hardware To Clamp 12 Foot Of GLO Brackets On Each Side Of Frame

    IOWA CUSTOMS

    $827.99
    SS 24 Foot Frame GLO Bracket Kit W/ Brackets & Hardware To Clamp 12 Foot Of GLO Brackets On Each Side Of Frame* High Quality Bracket Kit* Includes: - Brackets  - Hardware * 24 Foot - 12 Foot Of Glow...
    09-1610093
    SKU:
    09-1610093
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Lighting
    $827.99
    Qty in Cart: 0
    Price:
    $827.99
    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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