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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
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  • FREE SHIPPING OVER $249
    Air Brake Hose Fitting 3/8 MP X 1/2

    Air Brake Hose Fitting 3/8 MP X 1/2

    TRAMEC SLOAN

    $18.73
    Male Connector with Spring For Rubber Hose* High Quality Air Hose Fitting* Sold Individually* Warranty On Hose End Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...
    RB68SG86
    SKU:
    RB68SG86
    Truck Class:
    Heavy Duty
    Diameter Options:
    3/8 Inch
    Make:
    Universal Items
    Product Type:
    Air, Electrical, & Safety
    Ready To Ship:
    Yes
    $18.73
    Qty in Cart: 0
    Price:
    $18.73
    Subtotal:
  • FREE SHIPPING OVER $249
    Air Brake Rubber Hose Fitting 1/4 MP X 3/8

    Air Brake Rubber Hose Fitting 1/4 MP X 3/8

    TRAMEC SLOAN

    $8.07
    Air Brake Fitting For Rubber Hose* High Quality Hose End* Sold Individually* Warranty On Hose End Against Defects In Workmanship & Material From Date Of Purchase*** High Quality Aftermarket...
    RB68SG64
    SKU:
    RB68SG64
    Truck Class:
    Heavy Duty
    Diameter Options:
    1/4 Inch
    Make:
    Universal Items
    Product Type:
    Air, Electrical, & Safety
    Ready To Ship:
    Yes
    $8.07
    Qty in Cart: 0
    Price:
    $8.07
    Subtotal:
  • FREE SHIPPING OVER $249
    1/2 Inch Union For Rubber Brake Hose

    1/2 Inch Union For Rubber Brake Hose

    PARTS DISTRIBUTING

    $27.43
    Union For Rubber Brake Hose* High Quality Union* 1/2 Size* For Rubber Break Hose* Sold Individually* Warranty On Union Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...
    RB628
    SKU:
    RB628
    Truck Class:
    Heavy Duty
    Diameter Options:
    1/2 Inch
    Make:
    Universal Items
    Product Type:
    Air, Electrical, & Safety
    Ready To Ship:
    Yes
    $27.43
    Qty in Cart: 0
    Price:
    $27.43
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Aluminum Front Upper Side Fairing Step For Kenworth T600 1986-1995 Non-AeroCab

    BESTfit Aluminum Front Upper Side Fairing Step For Kenworth T600 1986-1995 Non-AeroCab

    BESTFIT TRUCK PARTS

    $171.99
    Choose Option(s) to see description.Fitment* Fits Kenworth T600 1986 thru 1990* Fits Kenworth T600B 1990 thru 1995* Does Not Fit AeroCab ModelsBESTfit Aluminum Front Upper Side Fairing Step Driver...
    PPR_20733
    SKU:
    PPR_20733
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Kenworth
    Product Type:
    Exterior
    Ready To Ship:
    Yes
    $171.99
    Qty in Cart: 0
    Price:
    $171.99
    Subtotal:
  • CSM 5 X 20 X 1/4 Inch Billet Aluminum Step Plate W/ 1776 & Treads Stainless Steel Insert W/ Color Options

    CSM 5 X 20 X 1/4 Inch Billet Aluminum Step Plate W/ 1776 & Treads Stainless Steel Insert W/ Color Options

    CHROME SHOP MAFIA

    $209.99 - $276.99
    Show off your patriotic pride with this custom engraved 1776 step plate, designed to add bold style to your truck's steps, deck plates, and floors. Constructed with a durable aluminum step plate, a...
    PPR_205157
    SKU:
    PPR_205157
    Length Options:
    20 Inch
    Width Options:
    5 Inch
    Truck Class:
    Universal
    Location:
    Made In USA
    Material Options:
    Billet Aluminum
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $209.99 - $276.99
    Qty in Cart: 0
    Price:
    $209.99 - $276.99
    Subtotal:
  • CSM 5 X 20 X 1/4 Inch Billet Aluminum Step Plate W/ Molan Labe SS Insert

    CSM 5 X 20 X 1/4 Inch Billet Aluminum Step Plate W/ Molan Labe SS Insert

    CHROME SHOP MAFIA

    $209.99 - $276.99
    Choose Option(s) to see description.CSM Molan Labe Step Plate - Plain, 5 X 20 X 1/4 InchPlain Step Plate With Stainless Steel Molan Labe Insert By Chrome Shop Mafia* High Quality Step Plate * Billet...
    PPR_205156
    SKU:
    PPR_205156
    Truck Class:
    Universal
    Location:
    Made In USA
    Length Options:
    20 Inch
    Width Options:
    5 Inch
    Material Options:
    Billet Aluminum
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $209.99 - $276.99
    Qty in Cart: 0
    Price:
    $209.99 - $276.99
    Subtotal:
  • Limited Quantity Available
    CSM 5 X 20 X 1/4 Inch Billet Aluminum Step Plate W/ Freedom Isn't Free SS Insert

    CSM 5 X 20 X 1/4 Inch Billet Aluminum Step Plate W/ Freedom Isn't Free SS Insert

    CHROME SHOP MAFIA

    $209.99 - $276.99
    Choose Option(s) to see description.CSM Freedom Isn't Free Step Plate - Plain, 5 X 20 X 1/4 InchPlain Billet Aluminum Step Plate With Stainless Steel Freedom Isn't Free Design Insert By Chrome Shop...
    PPR_205155
    SKU:
    PPR_205155
    Length Options:
    20 Inch
    Width Options:
    5 Inch
    Location:
    Made In USA
    Truck Class:
    Universal
    Material Options:
    Billet Aluminum
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $209.99 - $276.99
    Qty in Cart: 0
    Price:
    $209.99 - $276.99
    Subtotal:
  • On Sale
    Limited Quantity Available
    CSM 5 X 20 X 1/4 Inch Billet Aluminum Step Plate W/ Don't Tread On Me SS Insert

    CSM 5 X 20 X 1/4 Inch Billet Aluminum Step Plate W/ Don't Tread On Me SS Insert

    CHROME SHOP MAFIA

    $98.39 - $276.99
    Choose Option(s) to see description.CSM SS Do Not Tread On Me Step Plate - Plain, 5 X 20 X 1/4 Inch5 X 20 X 1/4 Inch Billet Aluminum Step Plate With Stainless Steel Don't Tread On Me Design Insert By...
    PPR_205154
    SKU:
    PPR_205154
    Location:
    Made In USA
    Truck Class:
    Universal
    Length Options:
    20 Inch
    Width Options:
    5 Inch
    Material Options:
    Billet Aluminum
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $98.39 - $276.99
    Qty in Cart: 0
    Price:
    $98.39 - $276.99
    Subtotal:
  • On Sale
    Limited Quantity Available
    CSM 5 X 20 X 1/4 Inch Billet Aluminum Step Plate W/ Cross & Treads SS Insert

    CSM 5 X 20 X 1/4 Inch Billet Aluminum Step Plate W/ Cross & Treads SS Insert

    CHROME SHOP MAFIA

    $170.48 - $276.99
    Choose Option(s) to see description.CSM SS Cross And Treads Step Plate - Plain, 5 X 20 X 1/4 InchPlain Billet Aluminum Step Plate W/ Stainless Steel Cross And Treads Design Insert By Chrome Shop...
    PPR_205153
    SKU:
    PPR_205153
    Length Options:
    20 Inch
    Width Options:
    5 Inch
    Truck Class:
    Universal
    Location:
    Made In USA
    Material Options:
    Billet Aluminum
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $170.48 - $276.99
    Qty in Cart: 0
    Price:
    $170.48 - $276.99
    Subtotal:
  • CSM 5 X 20 X 1/4 Inch Billet Aluminum Step Plate W/ Tommy Gun Stainless Steel Insert W/ Color Option

    CSM 5 X 20 X 1/4 Inch Billet Aluminum Step Plate W/ Tommy Gun Stainless Steel Insert W/ Color Option

    CHROME SHOP MAFIA

    $204.99 - $276.99
    Upgrade the look of your truck with this custom engraved step plate, designed to add bold style to steps, deck plates, and floors. Featuring a durable aluminum step plate mounted to a heavy-duty...
    PPR_205152
    SKU:
    PPR_205152
    Truck Class:
    Universal
    Location:
    Made In USA
    Length Options:
    20 Inch
    Width Options:
    5 Inch
    Make:
    Universal Items
    Material Options:
    Aluminum
    Color:
    Yellow
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $204.99 - $276.99
    Qty in Cart: 0
    Price:
    $204.99 - $276.99
    Subtotal:
  • On Sale
    Limited Quantity Available
    CSM 5 X 20 X 1/4 Inch Billet Aluminum Step Plate W/ American Flag SS Insert

    CSM 5 X 20 X 1/4 Inch Billet Aluminum Step Plate W/ American Flag SS Insert

    CHROME SHOP MAFIA

    $193.89 - $276.99
    Choose Option(s) to see description.CSM SS American Flag Step Plate - Plain, 5 X 20 X 1/4 Inch5 X 20 X 1/4 Inch Billet Aluminum Step Plate With Stainless Steel American Flag Design Insert By Chrome...
    PPR_205151
    SKU:
    PPR_205151
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Length Options:
    20 Inch
    Width Options:
    5 Inch
    Material Options:
    Aluminum
    Location:
    Made In USA
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $193.89 - $276.99
    Qty in Cart: 0
    Price:
    $193.89 - $276.99
    Subtotal:
  • On Sale
    Limited Quantity Available
    FREE SHIPPING OVER $249
    Chrome Plastic Skull Nut Covers Push On - 10 Pack For Hex Nuts & Bolts

    Chrome Plastic Skull Nut Covers Push On - 10 Pack For Hex Nuts & Bolts

    UNITED PACIFIC

    $2.02 - $14.45
    Choose Option(s) to see description.7/16 X 3/4 Inch Chrome Skull Nut Covers - Push On Style - 10 PackChrome Plastic Skull Nut CoversEnhance the look of your vehicle with this 10 pack of high-quality...
    PPR_205108
    SKU:
    PPR_205108
    Truck Class:
    Universal
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $2.02 - $14.45
    Qty in Cart: 0
    Price:
    $2.02 - $14.45
    Subtotal:
  • Merritt 23.5 X 28.5 Inch Top Opening Smooth Aluminum Step Box With Diamond Plate Door W/ Step

    Merritt 23.5 X 28.5 Inch Top Opening Smooth Aluminum Step Box With Diamond Plate Door W/ Step

    MERRITT

    $1,452.99 - $1,774.99
    Optimize your truck's storage with the Merritt 23.5 x 28.5 Inch Top Opening Smooth Aluminum Step Box, featuring a diamond plate door and integrated step for added convenience. Made from...
    PPR_204403
    SKU:
    PPR_204403
    Location:
    Made In USA
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Finish Options:
    Diamond Plate
    Truck Class:
    Heavy Duty
    Product Type:
    Toolboxes
    $1,452.99 - $1,774.99
    Qty in Cart: 0
    Price:
    $1,452.99 - $1,774.99
    Subtotal:
  • Merritt 23.5 X 28.5 Inch Smooth Aluminum Top Opening Step Box With Bright Door

    Merritt 23.5 X 28.5 Inch Smooth Aluminum Top Opening Step Box With Bright Door

    MERRITT

    $1,515.99 - $2,147.99
    Maximize storage efficiency with the Merritt 23.5 x 28.5 Inch Smooth Aluminum Top Opening Step Box with Bright Door, designed for heavy-duty use and professional appearance. Made from...
    PPR_204402
    SKU:
    PPR_204402
    Truck Class:
    Universal
    Location:
    Made In USA
    Material Options:
    Aluminum
    Make:
    Universal Items
    Finish Options:
    Smooth
    Truck Class:
    Heavy Duty
    Product Type:
    Toolboxes
    Ready To Ship:
    Yes
    $1,515.99 - $2,147.99
    Qty in Cart: 0
    Price:
    $1,515.99 - $2,147.99
    Subtotal:
  • Merritt 22 X 21 Inch Top Opening Smooth Aluminum Saddle Box With Bright Door, No Step

    Merritt 22 X 21 Inch Top Opening Smooth Aluminum Saddle Box With Bright Door, No Step

    MERRITT

    $1,258.99 - $1,704.99
    Enhance your truck's storage efficiency with the Merritt Aluminum Top Opening Smooth Aluminum Saddle Box with Bright Door, measuring 22 x 21 inches. Built from high-quality, corrosion-resistant...
    PPR_204400
    SKU:
    PPR_204400
    Truck Class:
    Universal
    Location:
    Made In USA
    Material Options:
    Aluminum
    Make:
    Universal Items
    Finish Options:
    Smooth
    Truck Class:
    Heavy Duty
    Product Type:
    Toolboxes
    $1,258.99 - $1,704.99
    Qty in Cart: 0
    Price:
    $1,258.99 - $1,704.99
    Subtotal:
  • Tie Rod End Type 4

    Tie Rod End Type 4

    AUTOMANN USA

    $159.99
    Maintain reliable steering performance with the Tie Rod End Type 4, designed as a replacement for select truck and trailer applications. Built for universal fitment depending on configuration, this...
    PPR_204391
    SKU:
    PPR_204391
    Truck Class:
    Universal
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    $159.99
    Qty in Cart: 0
    Price:
    $159.99
    Subtotal:
  • Stainless Steel Under Frame Light Bracket W Glo Watermelon LEDs, Clamp On

    Stainless Steel Under Frame Light Bracket W Glo Watermelon LEDs, Clamp On

    SHIFT PRODUCTS

    $97.99 - $297.99
    Optimize your rig with the Stainless Steel Under Frame Light Bracket featuring Glo Watermelon LED options and a clamp-on design. Built from 304-grade stainless steel, this heavy-duty bracket is...
    PPR_204334
    SKU:
    PPR_204334
    Truck Class:
    Universal
    Material Options:
    Stainless Steel
    Shape Options:
    Round
    Make:
    Universal Items
    Style Options:
    Watermelon
    Finish Options:
    Polished
    Product Type:
    Lighting
    $97.99 - $297.99
    Qty in Cart: 0
    Price:
    $97.99 - $297.99
    Subtotal:
  • FREE SHIPPING
    SS Air Line Trailer Service Box W/ Open Back & Light Options

    SS Air Line Trailer Service Box W/ Open Back & Light Options

    TRUX ACCESSORIES

    $413.99 - $537.99
    Elevate your truck with this stainless steel air line trailer service box with open back and light options. Constructed from mirror-finish stainless steel, this high-quality aftermarket box is...
    PPR_204315
    SKU:
    PPR_204315
    Truck Class:
    Universal
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Style Options:
    Surface Mount
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    $413.99 - $537.99
    Qty in Cart: 0
    Price:
    $413.99 - $537.99
    Subtotal:
  • FREE SHIPPING
    BESTfit Black Steel Single Chamber Air Tank For Kenworth T600, T600B, T660, T800, W900B, W900L

    BESTfit Black Steel Single Chamber Air Tank For Kenworth T600, T600B, T660, T800, W900B, W900L

    BESTFIT TRUCK PARTS

    $316.99 - $374.99
    Built with steel construction and a corrosion-resistant black phosphate finish, this single-chamber air tank is engineered to meet SAE J10 and FMVSS 121 standards. Depending on the selected...
    PPR_204260
    SKU:
    PPR_204260
    Truck Class:
    Heavy Duty
    Color:
    Black
    Material Options:
    Steel
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    Style Options:
    Single Chamber
    Length Options:
    46 Inch
    Rating:
    150 PSI
    Diameter Options:
    9 1/2 Inch
    $316.99 - $374.99
    Qty in Cart: 0
    Price:
    $316.99 - $374.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Poly Mount Bushing For Kenworth T660

    Poly Mount Bushing For Kenworth T660

    AUTOMANN USA

    $24.29 - $59.99
    Restore proper support and reduce vibration on your Kenworth T660 with these high-quality poly mount bushings. Designed for 2008 through 2017 models, these aftermarket bushings are available in lower...
    PPR_204259
    SKU:
    PPR_204259
    Truck Class:
    Heavy Duty
    Material Options:
    Rubber
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $24.29 - $59.99
    Qty in Cart: 0
    Price:
    $24.29 - $59.99
    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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