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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
    Plastic Floor Mat Kit For 18 Inch Deep Tool Box

    Plastic Floor Mat Kit For 18 Inch Deep Tool Box

    AFTERMARKET

    $16.31 - $43.85
    This Plastic Floor Mat Kit For 18 Inch Deep Tool Box is designed to line the bottom of compatible tool boxes and help reduce scratches and wear on both the box interior and the tools stored inside...
    PPR_202039
    SKU:
    PPR_202039
    Width Options:
    18 Inch
    Truck Class:
    Universal
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Product Type:
    Toolboxes
    Ready To Ship:
    Yes
    $16.31 - $43.85
    Qty in Cart: 0
    Price:
    $16.31 - $43.85
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  • Merritt 30.25 Inch Aluminum Flush Mount Dyna Deck Plate

    Merritt 30.25 Inch Aluminum Flush Mount Dyna Deck Plate

    MERRITT

    $227.99 - $753.99
    Upgrade your truck bed or trailer with the Merritt 30.25 Inch Aluminum Flush Mount Dyna Deck Plate. Available in multiple sizes-18.5 x 30.25, 28 x 30.25, 37.5 x 30.25, 56 x 30.25, and 65.25 x 30.25...
    PPR_201926
    SKU:
    PPR_201926
    Location:
    Made In USA
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Style Options:
    Flush Mount
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Length Options:
    46 Inch
    Ready To Ship:
    Yes
    Length Options:
    56 Inch
    Length Options:
    18 1/2 Inch
    Length Options:
    28 Inch
    Length Options:
    65 Inch
    Width Options:
    30 Inch
    Length Options:
    37 1/2 Inch
    Type Options:
    Flush Mount
    Length Options:
    74 Inch
    $227.99 - $753.99
    Qty in Cart: 0
    Price:
    $227.99 - $753.99
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  • FREE SHIPPING OVER $249
    Tie Rod End W/ 1.125 Inch OD For Eaton Steer Axle

    Tie Rod End W/ 1.125 Inch OD For Eaton Steer Axle

    BESTFIT TRUCK PARTS

    $47.85 - $66.99
    Upgrade your Freightliner or Western Star truck's steering with the 1-1/4 Inch OD Tie Rod End. This high-quality component is engineered featuring a robust design with a 1-1/4-inch outer diameter and...
    PPR_201713
    SKU:
    PPR_201713
    Truck Class:
    Heavy Duty
    Make:
    International
    Make:
    Freightliner
    Make:
    Ford
    Make:
    Peterbilt
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $47.85 - $66.99
    Qty in Cart: 0
    Price:
    $47.85 - $66.99
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  • BESTfit Single Leaf Z Spring For Kenworth AG400L Suspensions

    BESTfit Single Leaf Z Spring For Kenworth AG400L Suspensions

    BESTFIT TRUCK PARTS

    $1,116.99 - $1,295.99
    Restore your Kenworth AG400L suspension to peak condition with the BESTfit Single Leaf Z Spring, designed for durability, precision, and reliable support. Available for all positions-front/rear and...
    PPR_201553
    SKU:
    PPR_201553
    Width Options:
    3 Inch
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $1,116.99 - $1,295.99
    Qty in Cart: 0
    Price:
    $1,116.99 - $1,295.99
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  • On Sale
    FREE SHIPPING OVER $249
    Limited Quantity Available
    S2 Style Billet Aluminum Step Plate W/ Flat Ends For Side Boxes And Deck Plates

    S2 Style Billet Aluminum Step Plate W/ Flat Ends For Side Boxes And Deck Plates

    IOWA CUSTOMS

    $75.23 - $503.99
    The Billet Aluminum Step Plate in the S2 style with flat ends is a high-quality option specifically designed for side boxes and deck plates. Measuring 6 inches in width and 12 or 20 inches in length,...
    PPR_201332
    SKU:
    PPR_201332
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $75.23 - $503.99
    Qty in Cart: 0
    Price:
    $75.23 - $503.99
    Subtotal:
  • On Sale
    Limited Quantity Available
    Step Insert For S2 Style Step Plates With Flat Ends

    Step Insert For S2 Style Step Plates With Flat Ends

    IOWA CUSTOMS

    $16.39 - $59.99
    Refresh your rig with the step insert for S2-style step plates with flat ends, a top-quality replacement piece designed to fit S2 style step plates in a variety of sizes, helping refresh worn...
    PPR_201200
    SKU:
    PPR_201200
    Truck Class:
    Universal
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Finish Options:
    Polished
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $16.39 - $59.99
    Qty in Cart: 0
    Price:
    $16.39 - $59.99
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  • FREE SHIPPING OVER $249
    Step Insert For S1 Style Step Plates With Concave Ends

    Step Insert For S1 Style Step Plates With Concave Ends

    IOWA CUSTOMS

    $46.27 - $61.99
    The Step Insert for S1 Style Step Plates With Concave Ends is a versatile, top-quality accessory designed to refresh Series 1 step plates with a distinctive rectangle shape and concave ends that fit...
    PPR_201174
    SKU:
    PPR_201174
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Finish Options:
    Polished
    Material Options:
    Stainless Steel
    Truck Class:
    Heavy Duty
    Ready To Ship:
    Yes
    Product Type:
    Frame & Chassis
    $46.27 - $61.99
    Qty in Cart: 0
    Price:
    $46.27 - $61.99
    Subtotal:
  • FREE SHIPPING OVER $249
    S1 Style Billet Aluminum Step Plate With Concave Ends For Side Boxes & Deck Plates

    S1 Style Billet Aluminum Step Plate With Concave Ends For Side Boxes & Deck Plates

    IOWA CUSTOMS

    $152.99 - $483.99
    Maximize your truck with the S1 Style Billet Aluminum Step Plate with Concave Ends, an ideal accessory crafted for both functionality and aesthetics. This step plate measures 6 inches in width and 20...
    PPR_201146
    SKU:
    PPR_201146
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Ready To Ship:
    Yes
    Product Type:
    Frame & Chassis
    $152.99 - $483.99
    Qty in Cart: 0
    Price:
    $152.99 - $483.99
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  • FREE SHIPPING
    BESTfit Aluminum C Spring Hanger For Kenworth AG380 Suspension

    BESTfit Aluminum C Spring Hanger For Kenworth AG380 Suspension

    BESTFIT TRUCK PARTS

    $585.99 - $652.99
    The BESTfit Aluminum C Spring Hanger offers Kenworth AG380 owners durable, high-quality suspension support. Available for driver side and passenger side, this hanger provides precise alignment for...
    PPR_201137
    SKU:
    PPR_201137
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $585.99 - $652.99
    Qty in Cart: 0
    Price:
    $585.99 - $652.99
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  • FREE SHIPPING OVER $249
    Metal Dust Cover For T-Handle Lock

    Metal Dust Cover For T-Handle Lock

    AFTERMARKET

    $8.60
    Spring Loaded T-Handle Dust CoverThis high quality chrome spring loaded lock cover for a t-handle has a dust cover. The cover has 90 degrees of flats.* High Quality Lock Cover* Dust Cover* Chrome...
    DC90
    SKU:
    DC90
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Product Type:
    Cargo Control
    $8.60
    Qty in Cart: 0
    Price:
    $8.60
    Subtotal:
  • FREE SHIPPING OVER $249
    Rod Clevis For Kenworth & Peterbilt W900B, W900L, 359, 379 & 389

    Rod Clevis For Kenworth & Peterbilt W900B, W900L, 359, 379 & 389

    AFTERMARKET

    $29.12
    Rod Clevis For 4DP10 Cylinder* High Quality Rod Clevis* For 4DP10 Cylinder* Sold Individually* Warranty On Rod Clevis Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...
    CT19
    SKU:
    CT19
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Peterbilt
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $29.12
    Qty in Cart: 0
    Price:
    $29.12
    Subtotal:
  • FREE SHIPPING OVER $249
    Carrier Bearing Kit With Bracket Replaces 210661-1X CB2106611XSA

    Carrier Bearing Kit With Bracket Replaces 210661-1X CB2106611XSA

    OPP - ORIGINAL PARTS PROGRAM

    $146.99
    Carrier Bearing Kit* High Quality Carrier Bearing Kit* 18N Series With Bracket* Replaces OEM # 210121-1X, CB2106611XSA* Sold As Kit* Warranty On Hub Adapter Against Defects In Workmanship & Material...
    CB2106611XSA
    SKU:
    CB2106611XSA
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $146.99
    Qty in Cart: 0
    Price:
    $146.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Carrier Bearing Kit With Bracket Replaces 210121-1X CB2101211XSA

    Carrier Bearing Kit With Bracket Replaces 210121-1X CB2101211XSA

    OPP - ORIGINAL PARTS PROGRAM

    $108.99
    Carrier Bearing Kit* High Quality Carrier Bearing Kit* 17N Series With Bracket* Sold As Kit* Warranty On Hub Adapter Against Defects In Workmanship & Material From Date Of Purchase*|** This Is An OEM...
    CB2101211XSA
    SKU:
    CB2101211XSA
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $108.99
    Qty in Cart: 0
    Price:
    $108.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Zinc Hook For Rubber Strap

    Zinc Hook For Rubber Strap

    AFTERMARKET

    $4.55
    Rubber Strap Zinc HookDo you need a replacement rubber strap hook? 4 State Trucks stocks Austin Hardware zinc-plated hooks which are a type of draw latch or catch utilizing tension to secure closure...
    AH12002ZN
    SKU:
    AH12002ZN
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Toolboxes
    Ready To Ship:
    Yes
    $4.55
    Qty in Cart: 0
    Price:
    $4.55
    Subtotal:
  • FREE SHIPPING OVER $249
    Stainless Steel 2 inch Wide Continuous Hinge, 3/16 Pin

    Stainless Steel 2 inch Wide Continuous Hinge, 3/16 Pin

    AFTERMARKET

    $17.29
    2 Inch Wide 3/16 Pin Stainless Steel Continuous Hinge - Sold By FootThis stainless steel hinge sells per foot to accommodate any project you may have. They are designed to span the length of adjacent...
    A804X
    SKU:
    A804X
    Truck Class:
    Universal
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Exterior
    Ready To Ship:
    Yes
    $17.29
    Qty in Cart: 0
    Price:
    $17.29
    Subtotal:
  • Poly Trailing Arm Bushing W/ Cross Pin For Tracking Arm

    Poly Trailing Arm Bushing W/ Cross Pin For Tracking Arm

    ENERGY SUSPENSION

    $38.85
    Energy Suspension Trailing Arm Bush With Cross PinUpgrade your Peterbilt tracking arm with this durable poly bushing with a cross pin for a smooth ride! Trust 4 State Trucks for quality parts for...
    907024R
    SKU:
    907024R
    Truck Class:
    Heavy Duty
    Color:
    Red
    Location:
    Made In USA
    Material Options:
    Plastic/Poly
    Make:
    Peterbilt
    Product Type:
    Frame & Chassis
    $38.85
    Qty in Cart: 0
    Price:
    $38.85
    Subtotal:
  • Gabriel Fleetline Heavy Duty Shock Absorber Replaces 83312

    Gabriel Fleetline Heavy Duty Shock Absorber Replaces 83312

    GABRIEL

    $57.99
    Gabriel 83312 Shock AbsorberThe Gabriel Fleetline Heavy Duty Shock Absorber combines cutting-edge engineering and rugged construction to deliver superior ride performance for fleet vehicles. Directly...
    83312
    SKU:
    83312
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $57.99
    Qty in Cart: 0
    Price:
    $57.99
    Subtotal:
  • Merritt 30 In Aluminum Step Box, Powder Coated Gloss Black

    Merritt 30 In Aluminum Step Box, Powder Coated Gloss Black

    MERRITT

    $1,310.99
    30 In Aluminum Step Box With Smooth Door Powder Coated Gloss Black* High Quality Step Box* Made Of Aluminum* Powder Coated Gloss Black* 30 Inch* With Smooth Door* Made In USA* Sold Individually*...
    488GBK
    SKU:
    488GBK
    Length Options:
    30 Inch
    Location:
    Made In USA
    Color:
    Black
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $1,310.99
    Qty in Cart: 0
    Price:
    $1,310.99
    Subtotal:
  • Merritt 36 Inch Aluminum Step Box W/ Smooth Door & Chain Rack

    Merritt 36 Inch Aluminum Step Box W/ Smooth Door & Chain Rack

    MERRITT

    $1,448.99
    36 Inch Aluminum Step Box W/ Smooth Door & Chain Rack By MerrittStreamline your truck's storage with the Merritt 36 Inch Aluminum Step Box W/ Smooth Door & Chain Rack, a heavy-duty solution built for...
    482M001
    SKU:
    482M001
    Length Options:
    36 Inch
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Cargo Control
    Ready To Ship:
    Yes
    $1,448.99
    Qty in Cart: 0
    Price:
    $1,448.99
    Subtotal:
  • Merritt Smooth Aluminum Saddle Box Without Step- 22 X 21 X 30 Inch

    Merritt Smooth Aluminum Saddle Box Without Step- 22 X 21 X 30 Inch

    MERRITT

    $1,293.99
    22 X 21 X 30 Inch Aluminum Saddle Box W/ Smooth Aluminum Door By MerrittTake control of your truck's storage with the Merritt Smooth Aluminum Saddle Box Without Step, sized at 22 x 21 x 30 inches for...
    478
    SKU:
    478
    Width Options:
    21 Inch
    Length Options:
    22 Inch
    Height Options:
    30 Inch
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Material Options:
    Aluminum
    Product Type:
    Toolboxes
    $1,293.99
    Qty in Cart: 0
    Price:
    $1,293.99
    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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