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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
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  • Quantity
  • Price
  • Subtotal
  • Air Bag Adapter Passenger Side Replaces K129-500R For Kenworth

    Air Bag Adapter Passenger Side Replaces K129-500R For Kenworth

    AFTERMARKET

    $99.99
    Air Bag Adapter Fits KenworthMaintain smooth and reliable ride quality with the Passenger Side Air Bag Adapter for Kenworth, designed to replace OEM K129-500R. Constructed from high-quality...
    02-051007
    SKU:
    02-051007
    Truck Class:
    Heavy Duty
    Position:
    Driver Side
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $99.99
    Qty in Cart: 0
    Price:
    $99.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Gusset Steel Bracket Replaces K140-1662 For Kenworth AG100 Air Ride Suspensions

    BESTfit Gusset Steel Bracket Replaces K140-1662 For Kenworth AG100 Air Ride Suspensions

    BESTFIT TRUCK PARTS

    $163.99
    BESTfit Bracket Fits KenworthKeep your Kenworth suspension system strong and secure with the BESTfit Gusset Steel Bracket, designed to replace OEM part number K140-1662 for AG100 Air Ride Suspensions...
    02-051006
    SKU:
    02-051006
    Truck Class:
    Heavy Duty
    Position:
    Center
    Material Options:
    Steel
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $163.99
    Qty in Cart: 0
    Price:
    $163.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Air Spring Replaces K303-22 For Kenworth

    BESTfit Air Spring Replaces K303-22 For Kenworth

    BESTFIT TRUCK PARTS

    $205.99
    BESTfit Air Spring Fits Kenworth* High Quality Air Spring* Rolling Lobe Type* 5100 Load At 80 PSI* 64 Load At 100 PSI* 103 CPM Natural Frequency* Plastic Bottom Plate* Without Bumper* Dimensions:  -...
    02-051004
    SKU:
    02-051004
    Truck Class:
    Heavy Duty
    Style Options:
    Single Convolute
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $205.99
    Qty in Cart: 0
    Price:
    $205.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Leveling Valve Neway Replacement With 1 Suspension Port For Kenworth

    BESTfit Leveling Valve Neway Replacement With 1 Suspension Port For Kenworth

    BESTFIT TRUCK PARTS

    $84.99
    BESTfit Suspension Height Leveling Valve* High Quality Leveling Valve* Controlled Response Cr Hcv* With 1 Suspension Port* 1/8 Npt* Valve Only* Cr Type Without Dump* With 1/4 In Fittings* Sold...
    02-051001K01
    SKU:
    02-051001K01
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $84.99
    Qty in Cart: 0
    Price:
    $84.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Torque Arm Bushing Replaces 44694000, 4694-000L & 1693060C1 For Kenworth

    BESTfit Torque Arm Bushing Replaces 44694000, 4694-000L & 1693060C1 For Kenworth

    BESTFIT TRUCK PARTS

    $48.58
    BESTfit Torque Arm Bushing - Replaces 350330088, 35033201 & 8079894Keep your Kenworth stable and responsive with the BESTfit Torque Arm Bushing. Replacing 44694000, 4694-000L, and 1693060C1, it...
    02-0510014K01
    SKU:
    02-0510014K01
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $48.58
    Qty in Cart: 0
    Price:
    $48.58
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 1.87 X 4.375 Inch Torque Rod Bushing For Kenworth Rear AG380 Suspension

    BESTfit 1.87 X 4.375 Inch Torque Rod Bushing For Kenworth Rear AG380 Suspension

    BESTFIT TRUCK PARTS

    $40.58
    BESTfit Torque Rod Bushing - Replaces 47961, 47691000, 47691000L, A1611944800, E5275 & 321-223Strengthen your Kenworth AG380 rear suspension with the BESTfit 1.87 X 4.375 Inch Torque Rod Bushing,...
    02-0510013K01
    SKU:
    02-0510013K01
    Truck Class:
    Heavy Duty
    Diameter Options:
    1 Inch
    Length Options:
    4 Inch
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $40.58
    Qty in Cart: 0
    Price:
    $40.58
    Subtotal:
  • Air Spring & Cabin For 86 Inch For Kenworth T600, T660, T800 & W900 AeroCab

    Air Spring & Cabin For 86 Inch For Kenworth T600, T660, T800 & W900 AeroCab

    AUTOMANN USA

    $42.72
    Air Spring & Cabin For 86 Inch Kenworth T600, T660, T800 & W900 AeroCabMaintain optimal cabin comfort and stability in your Kenworth AeroCab with this premium 86-inch cabin air spring. With a 2...
    02-0510013
    SKU:
    02-0510013
    Height Options:
    10 Inch
    Truck Class:
    Heavy Duty
    Diameter Options:
    2 Inch
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $42.72
    Qty in Cart: 0
    Price:
    $42.72
    Subtotal:
  • FREE SHIPPING OVER $249
    Air Spring & Cabin For 86 Inch Kenworth T600, T800 & W900 AeroCab

    Air Spring & Cabin For 86 Inch Kenworth T600, T800 & W900 AeroCab

    AUTOMANN USA

    $42.72
    Air Spring & Cabin For 86 Inch Kenworth T600, T800 & W900 AeroCabKeep your 86-inch Kenworth AeroCab stable and comfortable with this premium Air Spring & Cabin, compatible with T600, T800, and W900...
    02-0510012
    SKU:
    02-0510012
    Diameter Options:
    2 Inch
    Truck Class:
    Heavy Duty
    Height Options:
    7 Inch
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $42.72
    Qty in Cart: 0
    Price:
    $42.72
    Subtotal:
  • Aluminum Drive Axle Center Hanger Replaces K274-184 For Kenworth AG-100 Suspension

    Aluminum Drive Axle Center Hanger Replaces K274-184 For Kenworth AG-100 Suspension

    AFTERMARKET

    $819.99
    Drive Axle Center Hanger Fits Kenworth AG-100 Suspension* High Quality Center Suspension Frame Bracket* Center Bracket Between The Tandems* Fits Driver Or Passenger Side* Sold Individually* Warranty...
    02-0510011
    SKU:
    02-0510011
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $819.99
    Qty in Cart: 0
    Price:
    $819.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 4.375 Inch Torque Arm Bushing For Kenworth AG & Airglide Suspensions

    BESTfit 4.375 Inch Torque Arm Bushing For Kenworth AG & Airglide Suspensions

    BESTFIT TRUCK PARTS

    $57.99
    BESTfit Torque Arm Bushing Fits Kenworth AG & Airglide Suspensions* High Quality Torque Arm Bushing* 4.375 Inch C To C Bolt Holes* Fits Trucks Equipped With AG200, AG230, AG400, AG460 And Airglide...
    02-0510010
    SKU:
    02-0510010
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $57.99
    Qty in Cart: 0
    Price:
    $57.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Air Spring Rolling Lobe Replaces W01-358-9422 For Kenworth Airglide 100

    Air Spring Rolling Lobe Replaces W01-358-9422 For Kenworth Airglide 100

    AUTOMANN USA

    $115.99
    Air Bag Fits KenworthFor drivers who depend on a smooth, controlled ride, this Prime-Ride Rolling Lobe Air Spring is the ideal replacement for the Kenworth Airglide 100 suspension system. Crafted...
    02-051001
    SKU:
    02-051001
    Truck Class:
    Heavy Duty
    Material Options:
    Rubber
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $115.99
    Qty in Cart: 0
    Price:
    $115.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Trunnion Bushing 2 57/64 OD X 1 15/16 ID X 4 Inch OAL- Red Replaces K066-058 For Kenworth 8 Bag Air Ride

    BESTfit Trunnion Bushing 2 57/64 OD X 1 15/16 ID X 4 Inch OAL- Red Replaces K066-058 For Kenworth 8 Bag Air Ride

    BESTFIT TRUCK PARTS

    $20.51
    Air Ride Trunnion Bushing Fits Kenworth* High Quality Trunnion Bushing* Made Of Polyurethane* 2 57/64 Inch O.D. X 1 15/16 Inch I.D. X 4 Inch Length* Replacement Part * Sold Individually* Made In USA*...
    02-051000
    SKU:
    02-051000
    Diameter Options:
    2 Inch
    Color:
    Red
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $20.51
    Qty in Cart: 0
    Price:
    $20.51
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Semi Round U-Bolt Kit 3/4 X 4 X 10.25 Inch For Kenworth

    BESTfit Semi Round U-Bolt Kit 3/4 X 4 X 10.25 Inch For Kenworth

    BESTFIT TRUCK PARTS

    $41.76
    BESTfit U-Bolt Kit - Replaces 453895C1, 465916C1, 465916C91, 201375100 & 02-01375-100* High Quality U-Bolt Kit* Kit Includes:  - (2) U Bolts (Semi-Round Bend)  - 10.25 Inch Overall Length  - 4.00...
    02-050966K01
    SKU:
    02-050966K01
    Width Options:
    4 Inch
    Length Options:
    10 Inch
    Diameter Options:
    3/4 Inch
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $41.76
    Qty in Cart: 0
    Price:
    $41.76
    Subtotal:
  • FREE SHIPPING OVER $249
    Rear of Front Shackle Hanger For Kenworth With MR902

    Rear of Front Shackle Hanger For Kenworth With MR902

    AUTOMANN USA

    $128.99
    Shackle Hanger Fits Kenworth Driver Or Passenger SideEnsure heavy-duty reliability on your Kenworth with the Rear of Front Shackle Hanger for MR902 suspensions. Built for driver or passenger side...
    02-050965K01
    SKU:
    02-050965K01
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $128.99
    Qty in Cart: 0
    Price:
    $128.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 1.75 X 6.6882 Inch Silent Block Pin Replaces 52375 & B65-6005 For Kenworth Front AG130 Suspension

    BESTfit 1.75 X 6.6882 Inch Silent Block Pin Replaces 52375 & B65-6005 For Kenworth Front AG130 Suspension

    BESTFIT TRUCK PARTS

    $46.26
    BESTfit 5.4375 Inch Center To Center Silent Block Pin For Kenworth C500, K100, T600 & T800When it comes to maintaining the integrity of your Kenworth Front AG130 suspension, the BESTfit 1.75 X 6.6882...
    02-050963K01
    SKU:
    02-050963K01
    Truck Class:
    Heavy Duty
    Diameter Options:
    1 Inch
    Length Options:
    6 Inch
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $46.26
    Qty in Cart: 0
    Price:
    $46.26
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 1.75 X 7.5 Inch Silent Block Pin For Kenworth With M1813 Hanger

    BESTfit 1.75 X 7.5 Inch Silent Block Pin For Kenworth With M1813 Hanger

    BESTFIT TRUCK PARTS

    $43.90
    BESTfit 6.312 Inch Center To Center Silent Block PinAchieve smooth and stable handling on your Kenworth with the BESTfit 1.75 X 7.5 Inch Silent Block Pin for M1813 hangers. Built with a...
    02-050962K01
    SKU:
    02-050962K01
    Length Options:
    7 Inch
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $43.90
    Qty in Cart: 0
    Price:
    $43.90
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Square U-Bolt Kit 3/4 X 4 X 8.875 Inch Replaces 680-322-07-25 & K241-309 For Kenworth

    BESTfit Square U-Bolt Kit 3/4 X 4 X 8.875 Inch Replaces 680-322-07-25 & K241-309 For Kenworth

    BESTFIT TRUCK PARTS

    $46.26
    BESTfit Square U-Bolt Kit Fits Kenworth C500, K100, T600 & T800Ensure your Kenworth suspension system performs with unwavering stability using the BESTfit Square U-Bolt Kit 3/4 x 4 x 8.875 Inch. This...
    02-050961K01
    SKU:
    02-050961K01
    Diameter Options:
    3/4 Inch
    Truck Class:
    Heavy Duty
    Length Options:
    8 Inch
    Width Options:
    4 Inch
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $46.26
    Qty in Cart: 0
    Price:
    $46.26
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 6.859 Inch Spring Pin With Double Lock For Kenworth With 4 Inch Wide Springs

    BESTfit 6.859 Inch Spring Pin With Double Lock For Kenworth With 4 Inch Wide Springs

    BESTFIT TRUCK PARTS

    $23.23
    BESTfit 5.3125 Inch Center To Center 1.25 Inch Diameter Spring Pin With Double Lock* High Quality Spring Pin* Front And Rear Of Front* Steering Axle* 1.250 Inch Width* 5.313 Inch Center To Center* 6...
    02-050957K01
    SKU:
    02-050957K01
    Truck Class:
    Heavy Duty
    Length Options:
    6 Inch
    Width Options:
    1 Inch
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $23.23
    Qty in Cart: 0
    Price:
    $23.23
    Subtotal:
  • BESTfit Air Bag Replaces K303-18 & W01-358-9617 For Kenworth AG200 Suspension

    BESTfit Air Bag Replaces K303-18 & W01-358-9617 For Kenworth AG200 Suspension

    AFTERMARKET

    $193.99
    BESTfit Air Spring With Small Air Inlet Fitting Fits Kenworth AG200 Air SuspensionRestore the confidence in your Kenworth AG200 suspension with this BESTfit Air Bag. The rolling-lobe design creates...
    02-050938K01
    SKU:
    02-050938K01
    Truck Class:
    Heavy Duty
    Style Options:
    Rolling Lobe
    Material Options:
    Plastic/Poly
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $193.99
    Qty in Cart: 0
    Price:
    $193.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Aluminum Side Bar 6.32 Inch With 1 Inch Pin Hole Replaces B20-1007 For Kenworth

    BESTfit Aluminum Side Bar 6.32 Inch With 1 Inch Pin Hole Replaces B20-1007 For Kenworth

    BESTFIT TRUCK PARTS

    $64.99
    BESTfit 4 Inch C-C X 1.262 Inch Thick Aluminum Side Bar Fits Kenworth K100, T300, T450, T600, T800 & W900Tackle your suspension repairs with confidence using this BESTfit Aluminum Side Bar designed...
    02-05091209K01
    SKU:
    02-05091209K01
    Width Options:
    1 Inch
    Truck Class:
    Heavy Duty
    Length Options:
    6 Inch
    Material Options:
    Aluminum
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $64.99
    Qty in Cart: 0
    Price:
    $64.99
    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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