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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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  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • 12.795 Inch U Shaped Air Disc Brake Rotor M44D75180 For Wabco

    12.795 Inch U Shaped Air Disc Brake Rotor M44D75180 For Wabco

    AUTOMANN USA

    $257.99
    12.795 Inch Wabco Air Disc Rotor W/ 17 Threaded Bolt Holes* High Quality Air Disc Rotor * 12.795 Inch * Threaded Bolt Holes * Disc Brake Shape- U Shape * Disc OD - 12.795 Inch * Overall Depth- 5.848...
    29-051700018
    SKU:
    29-051700018
    Diameter Options:
    12 Inch
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    $257.99
    Qty in Cart: 0
    Price:
    $257.99
    Subtotal:
  • 17.1 Inch U Shaped Air Disc Brake Rotor 23123642002, 55060, 55060P

    17.1 Inch U Shaped Air Disc Brake Rotor 23123642002, 55060, 55060P

    AUTOMANN USA

    $282.99
    17.1 Inch Air Disc Rotor W/ Threaded Bolt Holes* High Quality Air Disc Rotor * 17.10 Inch * Threaded Bolt Holes * Disc Brake Shape- U Shape Disc * OD - 17.10 Inch * Overall Depth- 5.650 Inch * Hole...
    29-051700013
    SKU:
    29-051700013
    Diameter Options:
    17 Inch
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    $282.99
    Qty in Cart: 0
    Price:
    $282.99
    Subtotal:
  • 17 Inch U Shaped Air Disc Brake Rotor 802082, K038574, BW802082,

    17 Inch U Shaped Air Disc Brake Rotor 802082, K038574, BW802082,

    AUTOMANN USA

    $309.99
    Air Disc Rotor - Replaces K038-574 & M44D76617* High Quality Air Disc Rotor * 17.00 Inch * Threaded Bolt Holes * Disc Brake Shape- U Shape Disc * OD - 17.00 Inch * Overall Depth- 5.906 Inch * Bolt...
    29-051700012
    SKU:
    29-051700012
    Diameter Options:
    17 Inch
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    $309.99
    Qty in Cart: 0
    Price:
    $309.99
    Subtotal:
  • 16.926 Inch Flat Shaped Air Disc Brake Rotor Replaces 802083, 802569, K012741

    16.926 Inch Flat Shaped Air Disc Brake Rotor Replaces 802083, 802569, K012741

    AUTOMANN USA

    $242.99
    16.926 Inch Air Disc RotorMaintain peak braking efficiency on your truck with this 16.926 Inch Flat Shaped Air Disc Brake Rotor, engineered for Bendix ADB22X systems. Featuring a flat/spline disc...
    29-051700011
    SKU:
    29-051700011
    Diameter Options:
    16 Inch
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $242.99
    Qty in Cart: 0
    Price:
    $242.99
    Subtotal:
  • Severe Duty Air Disc Brake Pads - 4 Piece Set - Replaces KIT15625PM, KIT15627PM

    Severe Duty Air Disc Brake Pads - 4 Piece Set - Replaces KIT15625PM, KIT15627PM

    AUTOMANN USA

    $256.99
    Severe Duty Air Disc Brake Pads - 4 Piece SetBuilt for demanding commercial truck applications, these severe duty air disc brake pads deliver dependable stopping power and long service life. Designed...
    29-051700010
    SKU:
    29-051700010
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $256.99
    Qty in Cart: 0
    Price:
    $256.99
    Subtotal:
  • Severe Duty Air Disc Brake Pads - Replaces 802593, K109249, MMD1203AF, D1203, 8323-D1203, MPBD1203HD

    Severe Duty Air Disc Brake Pads - Replaces 802593, K109249, MMD1203AF, D1203, 8323-D1203, MPBD1203HD

    AUTOMANN USA

    $198.99
    Air Disc Brake Pads - Replaces 1138162F, 5013257, 81508205099, 81508205104 & 29042* High Quality Air Disc Brake Pads* Severe Duty * Formulated For Demanding Service And Can Be Used On Vehicles In...
    29-051700009
    SKU:
    29-051700009
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Peterbilt
    Product Type:
    Frame & Chassis
    $198.99
    Qty in Cart: 0
    Price:
    $198.99
    Subtotal:
  • Severe Duty Air Disc Brake Pads - Replaces D1311, 8426-D1311, D1690, 8917-D1690, MPBD1311HD, 3222E2605

    Severe Duty Air Disc Brake Pads - Replaces D1311, 8426-D1311, D1690, 8917-D1690, MPBD1311HD, 3222E2605

    AUTOMANN USA

    $198.99
    Air Disc Brake Pads - Replaces 3222F2476, KIT2252H2BA, KIT2252H2BE, KIT2252H2CD, KIT2252H2DA & MMD1311AF* High Quality Air Disc Brake Pads* Severe Duty * Formulated For Demanding Service And Can Be...
    29-051700008
    SKU:
    29-051700008
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Peterbilt
    Product Type:
    Frame & Chassis
    $198.99
    Qty in Cart: 0
    Price:
    $198.99
    Subtotal:
  • Air Spring Rolling Lobe W/ Plastic Base Replaces W01-358-9203

    Air Spring Rolling Lobe W/ Plastic Base Replaces W01-358-9203

    AFTERMARKET

    $187.99
    Rolling Lobe Air Spring AssemblyWhen ride quality and load stability matter, trust the Rolling Lobe Air Spring with Plastic Base to deliver proven performance. Designed with a 15.50-inch design...
    29-051060
    SKU:
    29-051060
    Truck Class:
    Heavy Duty
    Style Options:
    Rolling Lobe
    Product Type:
    Frame & Chassis
    $187.99
    Qty in Cart: 0
    Price:
    $187.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Torque Rod Bushing Replaces 1693577C1 For Kenworth AG-200 & AG-400 8 Bag Suspension

    BESTfit Torque Rod Bushing Replaces 1693577C1 For Kenworth AG-200 & AG-400 8 Bag Suspension

    BESTFIT TRUCK PARTS

    $73.99
    BESTfit Torque Rod Bushing Fits Kenworth AG-200 & AG-400 8 Bag SuspensionKeep your Kenworth AG-200 or AG-400 8 Bag Suspension operating smoothly with the BESTfit Torque Rod Bushing, designed to...
    29-051037
    SKU:
    29-051037
    Length Options:
    3 Inch
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $73.99
    Qty in Cart: 0
    Price:
    $73.99
    Subtotal:
  • BESTfit Rolling Lobe Air Spring W/ Plastic Base Replaces W01-358-9644

    BESTfit Rolling Lobe Air Spring W/ Plastic Base Replaces W01-358-9644

    BESTFIT TRUCK PARTS

    $161.99
    Rolling Lobe Air Spring W/ Plastic Base By BESTfitExperience smooth, reliable performance with the BESTfit Rolling Lobe Air Spring with Plastic Base, engineered to replace W01-358-9644. Capable of...
    29-051031
    SKU:
    29-051031
    Diameter Options:
    12 Inch
    Truck Class:
    Heavy Duty
    Rating:
    100 PSI
    Product Type:
    Frame & Chassis
    $161.99
    Qty in Cart: 0
    Price:
    $161.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 24 Inch Torque Rod For Kenworth W900 W/ AG100 Airglide Suspension

    BESTfit 24 Inch Torque Rod For Kenworth W900 W/ AG100 Airglide Suspension

    BESTFIT TRUCK PARTS

    $195.99
    BESTfit Torque Rod - Replaces 3581270C1, 358013441, K195-376,The BESTfit 24-inch torque rod is engineered for Kenworth W900 trucks equipped with AG100 Airglide suspensions, delivering precise support...
    29-051027
    SKU:
    29-051027
    Length Options:
    24 Inch
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $195.99
    Qty in Cart: 0
    Price:
    $195.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Premium Rubber Torque Rod Bushing Replaces 90008265 For Kenworth AG Air Suspensions

    BESTfit Premium Rubber Torque Rod Bushing Replaces 90008265 For Kenworth AG Air Suspensions

    BESTFIT TRUCK PARTS

    $45.14
    BESTfit Premium Rubber Torque Rod Bushing Fits Kenworth, Holland & NewayThis high quality rubber torque rod bushing fits Kenworth AG air suspension models. The bushing has a 2.75 inch OD outer shell...
    29-051022
    SKU:
    29-051022
    Truck Class:
    Heavy Duty
    Diameter Options:
    2 Inch
    Material Options:
    Plastic/Poly
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $45.14
    Qty in Cart: 0
    Price:
    $45.14
    Subtotal:
  • FREE SHIPPING OVER $249
    Air Bag Replaces C81-1003, C81-1012, C81-6000 & W01-358-8813 For Flex Air, AG380 & Airglide Suspensions

    Air Bag Replaces C81-1003, C81-1012, C81-6000 & W01-358-8813 For Flex Air, AG380 & Airglide Suspensions

    AFTERMARKET

    $128.99
    Replacement Air Spring Rolling Lobe For Peterbilt & Kenworth* High Quality Air Spring * Sold Individually* Warranty On Air Spring Against Defects In Workmanship & Material From Date Of Purchase***...
    29-051014
    SKU:
    29-051014
    Truck Class:
    Heavy Duty
    Material Options:
    Rubber
    Make:
    Peterbilt
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $128.99
    Qty in Cart: 0
    Price:
    $128.99
    Subtotal:
  • Load-Share Single Side Air Bag Replacement Kit for 4 Inch Round Top U Bolt & Double Convolute

    Load-Share Single Side Air Bag Replacement Kit for 4 Inch Round Top U Bolt & Double Convolute

    LOAD-SHARE SUSPENSIONS

    $585.99
    Single Side Air Bag Replacement Kit for 4 Inch Round Top U Bolt & Double Convolute* High Quality Air Bag Replacement Kit* Single Side * Replacement Kit For 4 Inch Round Top U Bolt* Sold Individually*...
    29-051013
    SKU:
    29-051013
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $585.99
    Qty in Cart: 0
    Price:
    $585.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Air Spring Replacement For Gen III Air Ride Suspension by BESTfit

    Air Spring Replacement For Gen III Air Ride Suspension by BESTfit

    BESTFIT TRUCK PARTS

    $180.99
    BESTfit 12 Gauge Air Spring ReplacementRestore peak performance to your Gen III Air Ride Suspension with the BESTfit Air Spring Replacement, engineered for 12 Gauge Customs systems. Designed with a...
    29-051011
    SKU:
    29-051011
    Truck Class:
    Heavy Duty
    Style Options:
    Rolling Lobe
    Make:
    Kenworth
    Make:
    Peterbilt
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $180.99
    Qty in Cart: 0
    Price:
    $180.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Triple Convoluted Air Spring - Replaces W013588008

    BESTfit Triple Convoluted Air Spring - Replaces W013588008

    BESTFIT TRUCK PARTS

    $152.99
    Triple Convoluted Air Spring By BESTfitKeep your suspension smooth and stable with the BESTfit Triple Convoluted Air Spring. Capable of handling 5,400 lbs at 80 PSI and 6,800 lbs at 100 PSI, it...
    29-051007
    SKU:
    29-051007
    Truck Class:
    Heavy Duty
    Style Options:
    Triple Convolute
    Make:
    Trailer
    Product Type:
    Frame & Chassis
    $152.99
    Qty in Cart: 0
    Price:
    $152.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Air Bag For Steer Axle Kit-Replaces W01-358-6926

    Air Bag For Steer Axle Kit-Replaces W01-358-6926

    AUTOMANN USA

    $146.99
    Double Convoluted Air BagUpgrade your vehicle's steer axle system with this premium Air Bag, designed to replace OEM W01-358-6926. Featuring a double convoluted design, it delivers exceptional load...
    29-051006
    SKU:
    29-051006
    Truck Class:
    Heavy Duty
    Style Options:
    Double Convolute
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $146.99
    Qty in Cart: 0
    Price:
    $146.99
    Subtotal:
  • Air Spring Double Convoluted Air Bag Replaces W01-358-6897 For Watson & Chalin, Ridewell Suspensions

    Air Spring Double Convoluted Air Bag Replaces W01-358-6897 For Watson & Chalin, Ridewell Suspensions

    AFTERMARKET

    $113.99
    Double Convoluted Air Spring Fits Ridewell, Watson & Chalin SuspensionsEnsure smooth ride control and vibration absorption on your Watson, Chalin, or Ridewell suspension with the Double Convoluted...
    29-051004
    SKU:
    29-051004
    Height Options:
    10 Inch
    Diameter Options:
    8 Inch
    Truck Class:
    Heavy Duty
    Rating:
    100 PSI
    Style Options:
    Double Convolute
    Make:
    Trailer
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $113.99
    Qty in Cart: 0
    Price:
    $113.99
    Subtotal:
  • Air Spring For Hendrickson Trailer With Reyco Suspension

    Air Spring For Hendrickson Trailer With Reyco Suspension

    AFTERMARKET

    $165.99
    Trailer Suspension Air Bag W01-358-6927 Replacement* High Quality Air Spring* Double Convoluted* 2750 Load At 80 PSI* 3450 Load At 100 PSI* 91 CPM Natural Frequency* Without Bumper* Dimensions:  - 10...
    29-051002
    SKU:
    29-051002
    Rating:
    100 PSI
    Height Options:
    10 Inch
    Truck Class:
    Heavy Duty
    Make:
    Trailer
    Product Type:
    Frame & Chassis
    $165.99
    Qty in Cart: 0
    Price:
    $165.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Rolling Lobe Air Bag For Peterbilt Low Air Leaf, Kenworth AG210L, AG400L Suspensions

    BESTfit Rolling Lobe Air Bag For Peterbilt Low Air Leaf, Kenworth AG210L, AG400L Suspensions

    BESTFIT TRUCK PARTS

    $152.99
    BESTfit Rolling Lobe Air Bag - Replaces W01-358-8852Maintain precise ride control on Peterbilt low air leaf and Kenworth AG210L/AG400L suspensions with the BESTfit Rolling Lobe Air Bag. Its rolling...
    29-0510012
    SKU:
    29-0510012
    Height Options:
    24 Inch
    Truck Class:
    Heavy Duty
    Rating:
    100 PSI
    Diameter Options:
    12 Inch
    Style Options:
    Rolling Lobe
    Material Options:
    Plastic/Poly
    Make:
    Kenworth
    Make:
    Peterbilt
    Product Type:
    Frame & Chassis
    $152.99
    Qty in Cart: 0
    Price:
    $152.99
    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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