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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
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  • 10 Foot Deck Plate, Flush Mount. Modular Style With 13 Planks.

    10 Foot Deck Plate, Flush Mount. Modular Style With 13 Planks.

    MERRITT

    $1,181.99
    10 Foot Deck Plate, Flush Mount. Modular Style With 13 Planks* High Quality Deck Plate* 10 Foot* Flush Mount * Modular Style* With 13 Planks* Made In USA* Sold Individually* Warranty On Deck Plates...
    4413
    SKU:
    4413
    Length Options:
    120 Inch
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Style Options:
    Flush Mount
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $1,181.99
    Qty in Cart: 0
    Price:
    $1,181.99
    Subtotal:
  • Merritt 30.25 X 92.5 Inch Dyna Deck Plate- Flush Mount

    Merritt 30.25 X 92.5 Inch Dyna Deck Plate- Flush Mount

    MERRITT

    $964.99
    30.25 X 92.5 Inch Flush Mount Deck Plate By MerrittThe Merritt 30.25 92.5 Inch Dyna Deck Plate - Flush Mount is engineered to deliver maximum functionality and durability for any truck bed. Its flush...
    4410
    SKU:
    4410
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Style Options:
    Flush Mount
    Material Options:
    Aluminum
    Make:
    Universal Items
    Length Options:
    92 Inch
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $964.99
    Qty in Cart: 0
    Price:
    $964.99
    Subtotal:
  • Merritt 444 Deck Plate Mounting Hardware

    Merritt 444 Deck Plate Mounting Hardware

    MERRITT

    $38.07
    Mounting Hardware For Merritt 444 Deck Plate* High Quality Deck Plate Mounting Hardware* To Use With Merritt Deck Plate Number 444* Deck Plate Not Included* Hardware For 1 Deck Plate* Sold...
    440
    SKU:
    440
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    $38.07
    Qty in Cart: 0
    Price:
    $38.07
    Subtotal:
  • Dyna-Deck Top Mount Modular Deck Cover, 56 L X 33.25 W IN

    Dyna-Deck Top Mount Modular Deck Cover, 56 L X 33.25 W IN

    MERRITT

    $541.99
    56 L X 33.25 W Inch Deck Plate W/ Slide Together Planks* High Quality Deck Plate* Dimensions:   - 56 Length   - 33.25 Width* With Top Mount With Easy Slide Together Planks* Has Non Skid Ribbed Deck...
    436
    SKU:
    436
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Length Options:
    56 Inch
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $541.99
    Qty in Cart: 0
    Price:
    $541.99
    Subtotal:
  • Merritt Diamond Plate Aluminum Air Line Box W/ 2 Oval Light Holes

    Merritt Diamond Plate Aluminum Air Line Box W/ 2 Oval Light Holes

    MERRITT

    $423.99
    Air Line Connection BoxThis Merritt 31.58 X 9.36 X 9 inch diamond plated aluminum alloy air line connection box has two oval light holes. This air line connection box weighs 18 pounds and includes...
    3534
    SKU:
    3534
    Truck Class:
    Heavy Duty
    Length Options:
    31 Inch
    Material Options:
    Aluminum
    Finish Options:
    Diamond Plate
    Style Options:
    Surface Mount
    Product Type:
    Cargo Control
    $423.99
    Qty in Cart: 0
    Price:
    $423.99
    Subtotal:
  • Merritt Chain Tray Base Mount Hose Rack

    Merritt Chain Tray Base Mount Hose Rack

    MERRITT

    $141.99
    Base Mount Hose Rack Chain Tray* High Quality Chain Tray* Diamond Plated Aluminum * Measurements  - 30 1/4 Inch Length   - 22 5/8 Inch Width  - 2 3/4 Height  - 10 Lbs. Weight * Sold Individually*...
    3511
    SKU:
    3511
    Length Options:
    30 Inch
    Truck Class:
    Heavy Duty
    Width Options:
    22 Inch
    Material Options:
    Aluminum
    Finish Options:
    Diamond Plate
    Product Type:
    Cargo Control
    $141.99
    Qty in Cart: 0
    Price:
    $141.99
    Subtotal:
  • Merritt No Drill Mounting Kit For Side Mount Aluminum Battery Boxes

    Merritt No Drill Mounting Kit For Side Mount Aluminum Battery Boxes

    MERRITT

    $478.99
    Merritt No Drill Mounting Kit For Aluminum Side Mount Battery BoxesMount your Merritt Aluminum Side Mount Battery Box with this durable no-drill mounting kit. It will make the installation process...
    3507
    SKU:
    3507
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $478.99
    Qty in Cart: 0
    Price:
    $478.99
    Subtotal:
  • DPF Differential Pressure Sensor Replaces 2871960, 4984187

    DPF Differential Pressure Sensor Replaces 2871960, 4984187

    DAYTON / DORMAN

    $181.99
    DPF Differential Pressure SensorMonitor your diesel particulate filter accurately with the DPF Differential Pressure Sensor, a direct replacement for 2871960 and 4984187. Built with a rectangular...
    29-071029
    SKU:
    29-071029
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    $181.99
    Qty in Cart: 0
    Price:
    $181.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Screw-On Metal/Rubber Exhaust Brake Actuator, Brake Solenoid Flange - Replaces 3871707

    Screw-On Metal/Rubber Exhaust Brake Actuator, Brake Solenoid Flange - Replaces 3871707

    DAYTON / DORMAN

    $163.99
    Metal/Rubber Exhaust Brake Actuator & Brake Solenoid Flange* High Quality Exhaust Brake Actuator/ Brake Solenoid* Flange Material: Metal, Rubber* Housing Color: Silver* Mount Type: Screw On* Mounting...
    29-070500000
    SKU:
    29-070500000
    Truck Class:
    Heavy Duty
    Make:
    Chevrolet
    Make:
    International
    Make:
    GMC
    Make:
    Peterbilt
    Make:
    Ford
    Make:
    Kenworth
    Make:
    Freightliner
    Make:
    Mack
    Product Type:
    Frame & Chassis
    $163.99
    Qty in Cart: 0
    Price:
    $163.99
    Subtotal:
  • Load-Share Front Axle Air Ride Kit For Round U-Bolts

    Load-Share Front Axle Air Ride Kit For Round U-Bolts

    LOAD-SHARE SUSPENSIONS

    $877.99
    Steer Axle Air Ride Kit W/O Need For Shock BracketsThe Loadshare System Comes Complete With Air Bellows, Mounting Hardware, Brackets, Pressure Control System And Installation Instructions. The Air...
    29-05K0902
    SKU:
    29-05K0902
    Truck Class:
    Heavy Duty
    Make:
    Freightliner
    Make:
    Ford
    Make:
    Kenworth
    Make:
    Sterling
    Product Type:
    Frame & Chassis
    Position:
    Kit Full
    Ready To Ship:
    Yes
    $877.99
    Qty in Cart: 0
    Price:
    $877.99
    Subtotal:
  • Triple Convoluted Air Bag - Replaces SP3B22R, 578-93-3-100, FT-330-29, 64285, 8018, 8039, 3B12303, 93AR

    Triple Convoluted Air Bag - Replaces SP3B22R, 578-93-3-100, FT-330-29, 64285, 8018, 8039, 3B12303, 93AR

    AFTERMARKET

    $188.99
    Triple Convoluted Air Bag* High Quality Air Spring* Triple Convoluted* 5400 Load At 80 PSI* 6800 Load At 100 PSI* 79 CPM Natural Frequency* With Bumper* Dimensions:  - 12.00 Inch Design Height  - 4...
    29-052000004
    SKU:
    29-052000004
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    $188.99
    Qty in Cart: 0
    Price:
    $188.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Air Ride Suspension Leveling Valve - Replaces HV9990 For Kenworth, Peterbilt

    Air Ride Suspension Leveling Valve - Replaces HV9990 For Kenworth, Peterbilt

    AFTERMARKET

    $78.99
    Suspension Leveling ValveMaintain precise ride height and optimal performance on your Kenworth or Peterbilt with the Air Ride Suspension Leveling Valve. Designed for air ride suspensions, this...
    29-051803
    SKU:
    29-051803
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $78.99
    Qty in Cart: 0
    Price:
    $78.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Adjustable Leveling Valve Linkage Kit Replaces OE 03-05180, 03-06224, 0305180

    BESTfit Adjustable Leveling Valve Linkage Kit Replaces OE 03-05180, 03-06224, 0305180

    BESTFIT TRUCK PARTS

    $14.66
    BESTfit Height Control Valve Linkage And Rod Kit, Replaces 03-05180* High Quality Linkage Kit * Adjustable Linkage Kit For Height Control Valve* 18 Inch Rod With Ends* Hardware* Maximum Usable Length...
    29-051800
    SKU:
    29-051800
    Length Options:
    18 Inch
    Truck Class:
    Heavy Duty
    Make:
    International
    Make:
    Volvo
    Make:
    Hino
    Make:
    Trailer
    Make:
    Kenworth
    Make:
    Western Star
    Make:
    Freightliner
    Make:
    Peterbilt
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $14.66
    Qty in Cart: 0
    Price:
    $14.66
    Subtotal:
  • FREE SHIPPING OVER $249
    TPHD Brake Chamber Sealed Type 30/30 2.5 Inch Stroke For Kenworth T660, Peterbilt 379, Volvo VNL Gen II

    TPHD Brake Chamber Sealed Type 30/30 2.5 Inch Stroke For Kenworth T660, Peterbilt 379, Volvo VNL Gen II

    TURNPIKE TRUCK TRIM

    $77.99
    30/30 Type Sealed Spring Brake Fits Kenworth T660, Peterbilt 379 & Volvo VNL Gen IIDelivering dependable stopping power starts with quality components, and the TPHD Type 30/30 Sealed Brake Chamber is...
    29-051710
    SKU:
    29-051710
    Length Options:
    9 Inch
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Make:
    Peterbilt
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $77.99
    Qty in Cart: 0
    Price:
    $77.99
    Subtotal:
  • TPHD Type 20 Service Chamber W/ 9.5 Inch Pushrod, 2.25 Inch Stroke Length

    TPHD Type 20 Service Chamber W/ 9.5 Inch Pushrod, 2.25 Inch Stroke Length

    AFTERMARKET

    $40.93
    Type 20 Service Chamber W/ Standard Stroke & Welded Clevis By TPHDMaintain consistent air brake performance with the TPHD Type 20 Service Chamber, designed with a 9.5-inch pushrod and 2.25-inch...
    29-051709
    SKU:
    29-051709
    Length Options:
    10 Inch
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    $40.93
    Qty in Cart: 0
    Price:
    $40.93
    Subtotal:
  • FREE SHIPPING OVER $249
    TPHD Type 30 Long Stroke Brake Diaphragm - 7.85 Inch OD

    TPHD Type 30 Long Stroke Brake Diaphragm - 7.85 Inch OD

    TURNPIKE TRUCK TRIM

    $7.92
    Replacement 7.85 Inch Brake Diaphragm - Type 30 For Long Stroke Chambers* High Quality Brake Diaphragm* Type 30* Fits Long Stroke Chambers Only* 7.875 Inch Outside Diameter* 1.905 Inch Height* Sold...
    29-051706
    SKU:
    29-051706
    Height Options:
    1 Inch
    Diameter Options:
    7 Inch
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $7.92
    Qty in Cart: 0
    Price:
    $7.92
    Subtotal:
  • FREE SHIPPING OVER $249
    TPHD Brake Chamber Sealed Type 30/30, Long Stroke 3 Inch

    TPHD Brake Chamber Sealed Type 30/30, Long Stroke 3 Inch

    TURNPIKE TRUCK TRIM

    $85.99
    Double Brake Chamber Type 3030 Long Stroke - 8.00 Inch Diameter By TPHDMaintain superior braking control and safety with this TPHD Brake Chamber Sealed Type 30/30, Long Stroke 3 Inch. Built for...
    29-051705
    SKU:
    29-051705
    Length Options:
    11 Inch
    Width Options:
    6 Inch
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $85.99
    Qty in Cart: 0
    Price:
    $85.99
    Subtotal:
  • FREE SHIPPING OVER $249
    TPHD Clevis Kit With Straight, 5/8in-18 Threads, 1/2in Pin,

    TPHD Clevis Kit With Straight, 5/8in-18 Threads, 1/2in Pin,

    TURNPIKE TRUCK TRIM

    $4.19
    TPHD Standard Clevis Kit For Brake Chambers 5/8 Inch - 18 TPI With Single Pin* High Quality Clevis Kit* For Brake Chamber Used Without Auto Slack Adjusters* 0.625-18 Inch Thread* 0.500 Inch Pin...
    29-051704
    SKU:
    29-051704
    Diameter Options:
    5/8 Inch
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $4.19
    Qty in Cart: 0
    Price:
    $4.19
    Subtotal:
  • FREE SHIPPING OVER $249
    TPHD Type 30 Service Chamber With 8.250 Inch Stem Length - Brake Chamber

    TPHD Type 30 Service Chamber With 8.250 Inch Stem Length - Brake Chamber

    TURNPIKE TRUCK TRIM

    $48.49
    Single Brake Chamber Type 30 - 8.00 Inch DiameterMaintain dependable stopping power with this high-quality TPHD Type 30 Service Chamber. Featuring a stroke length of 2.25 inches and an 8.250-inch...
    29-051701
    SKU:
    29-051701
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Make:
    Kenworth
    Make:
    Volvo
    Product Type:
    Frame & Chassis
    $48.49
    Qty in Cart: 0
    Price:
    $48.49
    Subtotal:
  • FREE SHIPPING OVER $249
    Brake Master Cylinder Brake Booster W/ 1.25 Inch Master Cylinder - Replaces 8-97315-166-0, 97315166

    Brake Master Cylinder Brake Booster W/ 1.25 Inch Master Cylinder - Replaces 8-97315-166-0, 97315166

    DAYTON / DORMAN

    $144.99
    Brake Master Cylinder Brake Booster W/ 1.25 Inch Master Cylinder* High Quality Brake Master Cylinder * Brake Booster Included: Yes* Master Cylinder Bore Diameter: 1-1/4 Inch* Master Cylinder Cap...
    29-051700023
    SKU:
    29-051700023
    Truck Class:
    Heavy Duty
    Make:
    GMC
    Make:
    Chevrolet
    Make:
    Isuzu
    Product Type:
    Frame & Chassis
    $144.99
    Qty in Cart: 0
    Price:
    $144.99
    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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