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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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  • FREE SHIPPING OVER $249
    BESTfit Steel Side Bar 6.32 Inch W/ 1 Inch Pin Hole Replaces B20-1007 For Kenworth

    BESTfit Steel Side Bar 6.32 Inch W/ 1 Inch Pin Hole Replaces B20-1007 For Kenworth

    BESTFIT TRUCK PARTS

    $53.99
    BESTfit 4 Inch C-C X 1.262 Inch Thick Steel Side Bar Fits Kenworth K100, T300, T450, T600, T800 & W900When suspension reliability is non-negotiable, the BESTfit Steel Side Bar 6.32 Inch With 1 Inch...
    02-05091208K01
    SKU:
    02-05091208K01
    Width Options:
    1 Inch
    Truck Class:
    Heavy Duty
    Length Options:
    6 Inch
    Material Options:
    Steel
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $53.99
    Qty in Cart: 0
    Price:
    $53.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Aluminum Leaf Spring Side Bar 6.375 W/ 1.063 Inch Pin Hole Replaces B20-6006 For Kenworth

    BESTfit Aluminum Leaf Spring Side Bar 6.375 W/ 1.063 Inch Pin Hole Replaces B20-6006 For Kenworth

    BESTFIT TRUCK PARTS

    $56.99
    BESTfit 4 Inch C-C X 1.25 Inch Thick Aluminum Side Bar Fits Kenworth K100, K300, T300, T400, T450, T600, T800 & W900Keep your Kenworth suspension performing at its best with the BESTfit Aluminum Leaf...
    02-05091207K01
    SKU:
    02-05091207K01
    Width Options:
    2 Inch
    Truck Class:
    Heavy Duty
    Length Options:
    6 Inch
    Material Options:
    Aluminum
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $56.99
    Qty in Cart: 0
    Price:
    $56.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Steel Leaf Spring Side Bar With 1.063 Inch Pin Hole Replaces B20-6006 For Kenworth

    BESTfit Steel Leaf Spring Side Bar With 1.063 Inch Pin Hole Replaces B20-6006 For Kenworth

    BESTFIT TRUCK PARTS

    $37.26
    BESTfit 1.25 Inch Thick Steel Side Bar Fits Kenworth K100, T300, T450, T600, T800 & W9006.375 X* High Quality Side Bar* Steel* 6.375 Inch Overall Length* 2 Inch Width* 1.063 Inch Pin Hole* 4 Inches...
    02-05091206K01
    SKU:
    02-05091206K01
    Width Options:
    2 Inch
    Truck Class:
    Heavy Duty
    Length Options:
    6 Inch
    Material Options:
    Steel
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $37.26
    Qty in Cart: 0
    Price:
    $37.26
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 7.87 Inch OAL X 1.062 Inch OD 1.375 Inch M33.5-4 Threaded Spring Pin Replaces B65-1008 & PB64-1008 For Kenworth

    BESTfit 7.87 Inch OAL X 1.062 Inch OD 1.375 Inch M33.5-4 Threaded Spring Pin Replaces B65-1008 & PB64-1008 For Kenworth

    BESTFIT TRUCK PARTS

    $26.65
    BESTfit 6.33 Inch C-C Threaded Spring Pin Fits Kenworth K100, T300, T450, T600, T800 & W900Maintain your Kenworth's suspension reliability with the BESTfit 7.87 Inch OAL X 1.062 Inch OD 1.375 Inch...
    02-05091205K01
    SKU:
    02-05091205K01
    Diameter Options:
    1 Inch
    Truck Class:
    Heavy Duty
    Length Options:
    7 Inch
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $26.65
    Qty in Cart: 0
    Price:
    $26.65
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 177MM OAL X 27MM OD M33.5-4 Threaded Spring Pin Replaces B65-6008 For Kenworth

    BESTfit 177MM OAL X 27MM OD M33.5-4 Threaded Spring Pin Replaces B65-6008 For Kenworth

    BESTFIT TRUCK PARTS

    $32.66
    BESTfit 138MM C-C Threaded Spring Pin Fits Kenworth K100, T300, T450, T600, T800 & W900The BESTfit 177MM OAL X 27MM OD M33.5-4 Threaded Spring Pin delivers strength, precision, and durability for...
    02-05091204K01
    SKU:
    02-05091204K01
    Length Options:
    6 Inch
    Truck Class:
    Heavy Duty
    Size Options:
    27 mm
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $32.66
    Qty in Cart: 0
    Price:
    $32.66
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 7.375 Inch OAL X 1.5 Inch OD 1.375 Inch 6 Threaded Spring Pin Replaces 6262 & 02-02723 For Kenworth

    BESTfit 7.375 Inch OAL X 1.5 Inch OD 1.375 Inch 6 Threaded Spring Pin Replaces 6262 & 02-02723 For Kenworth

    BESTFIT TRUCK PARTS

    $40.58
    BESTfit 5.75 Inch C-C Threaded Spring Pin Fits Kenworth K100, T300, T450, T600, T800 & W900Secure your Kenworth suspension with the BESTfit 7.375 Inch OAL X 1.5 Inch OD 1.375 Inch 6 Threaded Spring...
    02-05091203K01
    SKU:
    02-05091203K01
    Truck Class:
    Heavy Duty
    Diameter Options:
    1 Inch
    Length Options:
    7 Inch
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $40.58
    Qty in Cart: 0
    Price:
    $40.58
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 7.5 Inch OAL X 2.077 Inch OD Silent Block Bushing 1.063 Inch Pin Replaces 52757 & B65-1007 For Kenworth

    BESTfit 7.5 Inch OAL X 2.077 Inch OD Silent Block Bushing 1.063 Inch Pin Replaces 52757 & B65-1007 For Kenworth

    BESTFIT TRUCK PARTS

    $63.99
    BESTfit Silent Block Bushing Fits Kenworth K100, T300, T450, T600, T800 & W900 - Replaces 52312, 52257, B65-1012 & B65-2013For Kenworth trucks requiring secure leaf spring attachment, the BESTfit 7.5...
    02-05091202K01
    SKU:
    02-05091202K01
    Length Options:
    7 Inch
    Truck Class:
    Heavy Duty
    Diameter Options:
    2 Inch
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $63.99
    Qty in Cart: 0
    Price:
    $63.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 101MM OAL X 52.8MM OD Threaded Bushing Replaces B13-1002 For Kenworth 4 Inch Spring

    BESTfit 101MM OAL X 52.8MM OD Threaded Bushing Replaces B13-1002 For Kenworth 4 Inch Spring

    BESTFIT TRUCK PARTS

    $39.40
    101MM OAL X 52.8MM OD Threaded Bushing By BESTfit Replaces B13-1002 Fits Kenworth 4 Inch SpringThe BESTfit 101MM OAL X 52.8MM OD Threaded Bushing provides Kenworth 4-inch springs with high-quality...
    02-05091201K01
    SKU:
    02-05091201K01
    Diameter Options:
    2 Inch
    Truck Class:
    Heavy Duty
    Length Options:
    3 Inch
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $39.40
    Qty in Cart: 0
    Price:
    $39.40
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 4 Inch OAL X 1.75 Inch OD 1.375 Inch Threaded Bushing Replaces 5295 & 52991 For Kenworth

    BESTfit 4 Inch OAL X 1.75 Inch OD 1.375 Inch Threaded Bushing Replaces 5295 & 52991 For Kenworth

    BESTFIT TRUCK PARTS

    $24.44
    BESTfit 6 Thread Bushing Fits Kenworth K100, T300, T450, T600, T800 & W900Keep your Kenworth 4-inch spring suspension operating at peak performance with the BESTfit 4 Inch OAL X 1.75 Inch OD 1.375...
    02-05091200K01
    SKU:
    02-05091200K01
    Length Options:
    4 Inch
    Diameter Options:
    1 Inch
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $24.44
    Qty in Cart: 0
    Price:
    $24.44
    Subtotal:
  • BESTfit 3 Leaf Parabolic Steer Axle Spring 4 Inch Wide Replaces B81-1006 For Kenworth W900

    BESTfit 3 Leaf Parabolic Steer Axle Spring 4 Inch Wide Replaces B81-1006 For Kenworth W900

    BESTFIT TRUCK PARTS

    $964.99
    Parabolic Steer Axle Leaf Spring W/ 2 Threaded Bushings & 7500 Lb Capacity By BESTfit Replaces B81-1006 Fits Kenworth W900Keep your Kenworth W900 riding on a dependable front suspension with this...
    02-050912
    SKU:
    02-050912
    Width Options:
    4 Inch
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $964.99
    Qty in Cart: 0
    Price:
    $964.99
    Subtotal:
  • FREE SHIPPING OVER $249
    1.25 ID, 1.5 OD X 3.93 Inch Sealed Front Axle Spring & Hanger Bushing Replaces 02-01805 For Kenworth

    1.25 ID, 1.5 OD X 3.93 Inch Sealed Front Axle Spring & Hanger Bushing Replaces 02-01805 For Kenworth

    AUTOMANN USA

    $25.55
    Sealed Front Axle Spring & Hanger Bushing Fits Kenworth* High Quality Sealed Front Axle Spring And Bushing* Nylon Sealed Bushing* 1-1/4In I.D. X 1-1/2 Inch O.D. X 3.93 Inch Oal* Front Axle Springs...
    02-0509116K01
    SKU:
    02-0509116K01
    Length Options:
    3 Inch
    Truck Class:
    Heavy Duty
    Diameter Options:
    1 Inch
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $25.55
    Qty in Cart: 0
    Price:
    $25.55
    Subtotal:
  • FREE SHIPPING OVER $249
    Steer Spring Hanger Assembly Replaces B11-1034-8 For Kenworth

    Steer Spring Hanger Assembly Replaces B11-1034-8 For Kenworth

    AUTOMANN USA

    $225.99
    Hanger Assembly For Kenworth Steer SpringThe Steer Spring Hanger Assembly by BESTfit is a premium replacement for Kenworth part B11-1034-8, engineered to maintain proper front leaf spring alignment...
    02-0509115K01
    SKU:
    02-0509115K01
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $225.99
    Qty in Cart: 0
    Price:
    $225.99
    Subtotal:
  • Rear of Front Shackle Hanger B11-6035-001 For Kenworth With AG130 Air Suspension

    Rear of Front Shackle Hanger B11-6035-001 For Kenworth With AG130 Air Suspension

    AFTERMARKET

    $287.99
    Shackle Hanger For Kenworth With AG130 Air Suspension* High Quality Cast Spring Hanger* For Rear Of Steer Axle* For 4 Inch Wide Spring* 1.750 Inch Pin Diameter* Includes 1 MR902 Bushing Silent Block*...
    02-050911
    SKU:
    02-050911
    Truck Class:
    Heavy Duty
    Length Options:
    15 Inch
    Position:
    Rear
    Material Options:
    Aluminum
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $287.99
    Qty in Cart: 0
    Price:
    $287.99
    Subtotal:
  • FREE SHIPPING
    BESTfit Aluminum Shackle Hanger Cast #B11-1033 Replaces B11-10344 For Kenworth K100, K300, T300-T800 & W900

    BESTfit Aluminum Shackle Hanger Cast #B11-1033 Replaces B11-10344 For Kenworth K100, K300, T300-T800 & W900

    BESTFIT TRUCK PARTS

    $290.99
    BESTfit Shackle Hanger Fits Kenworth K100, T300, T450, T600, T800 & W900* High Quality Shackle Hanger* Rear Of Front* Made Of Aluminum* Driver Or Passenger Side * Hanger Dimensions:  - 3.94 Inch C To...
    02-05091011
    SKU:
    02-05091011
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $290.99
    Qty in Cart: 0
    Price:
    $290.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Steel Shackle Hanger Cast #B11-1033 Replaces B11-10344 For Kenworth K100, K300, T300-T800 & W900

    Steel Shackle Hanger Cast #B11-1033 Replaces B11-10344 For Kenworth K100, K300, T300-T800 & W900

    AUTOMANN USA

    $98.99
    Shackle Hanger Fits Kenworth K100, T300, T450, T600, T800 & W900* High Quality Shackle Hanger* Steel* Cast # B11-1033* Sold Individually* Warranty On Shackle Hanger Against Defects In Workmanship &...
    02-05091010
    SKU:
    02-05091010
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $98.99
    Qty in Cart: 0
    Price:
    $98.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Aluminum 4 Degree Type 1 Shim Wedge 4 X 6 Inch For Kenworth Steer Axle Spring

    Aluminum 4 Degree Type 1 Shim Wedge 4 X 6 Inch For Kenworth Steer Axle Spring

    AUTOMANN USA

    $27.09
    4 Degree Type 1 Aluminum Shim Wedge 4 X 6 Inch Fits Kenworth Steer Axle SpringFor a dependable replacement for your Kenworth steer axle spring, choose this 4 Degree Aluminum Type 1 Shim Wedge. Made...
    02-0509100K02
    SKU:
    02-0509100K02
    Width Options:
    4 Inch
    Length Options:
    6 Inch
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $27.09
    Qty in Cart: 0
    Price:
    $27.09
    Subtotal:
  • FREE SHIPPING OVER $249
    1.25 ID, 1.5 OD X 4 Inch Spring Bushing For Steer Axle Replaces 16-12399-001, 30057007 & 10651H For Kenworth

    1.25 ID, 1.5 OD X 4 Inch Spring Bushing For Steer Axle Replaces 16-12399-001, 30057007 & 10651H For Kenworth

    AUTOMANN USA

    $8.25
    Spring Bushing For Kenworth Steer Axle - Replaces CS66658B, R301876 & 61310207* High Quality Bi-Metal Spring Bushing* 1-1/2 Inch X 1-1/4 Inch X 4 Inch* Suspension Bushing* Sold Individually* Warranty...
    02-0509100K01
    SKU:
    02-0509100K01
    Width Options:
    4 Inch
    Diameter Options:
    1 Inch
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $8.25
    Qty in Cart: 0
    Price:
    $8.25
    Subtotal:
  • FREE SHIPPING OVER $249
    6 Inch OAL X 4 Inch Wide Aluminum Front Spring Spacer Replaces K221-4293 For Kenworth

    6 Inch OAL X 4 Inch Wide Aluminum Front Spring Spacer Replaces K221-4293 For Kenworth

    AUTOMANN USA

    $43.84
    2 Inch Thick Front Spring Spacer Fits Kenworth K100, T300-T800 & W900Restore accurate spacing and load balance with this aluminum front spring spacer for Kenworth trucks. With 6-inch overall length,...
    02-05091009
    SKU:
    02-05091009
    Width Options:
    4 Inch
    Length Options:
    6 Inch
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $43.84
    Qty in Cart: 0
    Price:
    $43.84
    Subtotal:
  • FREE SHIPPING OVER $249
    6 Inch OAL X 4 Inch Wide Aluminum Front Spring Spacer Replaces K221-3651 & K221-4785 For Kenworth

    6 Inch OAL X 4 Inch Wide Aluminum Front Spring Spacer Replaces K221-3651 & K221-4785 For Kenworth

    AUTOMANN USA

    $39.35
    1/2 Inch Thick Front Spring Spacer Fits Kenworth K100, T2000, T300, T600, T660, T800 & W900Boost your Kenworth's suspension performance with the 6 Inch OAL X 4 Inch Wide Aluminum Front Spring Spacer...
    02-05091008
    SKU:
    02-05091008
    Width Options:
    4 Inch
    Length Options:
    6 Inch
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $39.35
    Qty in Cart: 0
    Price:
    $39.35
    Subtotal:
  • FREE SHIPPING OVER $249
    6 Inch OAL X 4 Inch Wide Aluminum Front Spring Spacer Replaces K221-4737 For Kenworth

    6 Inch OAL X 4 Inch Wide Aluminum Front Spring Spacer Replaces K221-4737 For Kenworth

    AUTOMANN USA

    $61.99
    1 Inch Thick Front Spring Spacer Fits Kenworth K100, T2000, T300, T600, T660, T800 & W900Ride with confidence using this high-performance aluminum front spring spacer, designed for Kenworth trucks...
    02-05091007
    SKU:
    02-05091007
    Width Options:
    1 Inch
    Length Options:
    6 Inch
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $61.99
    Qty in Cart: 0
    Price:
    $61.99
    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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