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Kenworth T800 Parts

Shop for Kenworth T800 parts and accessories to maintain and customize your heavy-duty truck components, from the interior sleeper to the exterior cab.
  • Product
  • Qty in Cart
  • Quantity
  • Price
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  • 10 Pack 1157 Type Clear Bulb W/ Indexed Double Contact Bayonet Base

    10 Pack 1157 Type Clear Bulb W/ Indexed Double Contact Bayonet Base

    UNITED PACIFIC

    $5.99
    Clear Bulb 1157 Type W/ Indexed Double Contact Bayonet Base 10 Pack* High Quality Incandescent Bulb* 1157 Type* Indexed Double Contact Bayonet Base* Sold As Pack (10)* Warranty On Incandescent Bulbs...
    09-16000219
    SKU:
    09-16000219
    Product Type:
    Lighting
    Make:
    Universal Items
    $5.99
    Qty in Cart: 0
    Price:
    $5.99
    Subtotal:
  • Mini Rectangular Rubber Grommet 3.25 X 1.875 Inch 10 Pack

    Mini Rectangular Rubber Grommet 3.25 X 1.875 Inch 10 Pack

    UNITED PACIFIC

    $6.99
    10 Pack Mini Rectangular Rubber Grommet 3.25 X 1.875 Inch* High Quality Mini Rectangular Grommet* Made Of PVC Rubber* Designed For Mini Rectangular Style Lights (Lights Not Included)* Provides...
    09-16020548
    SKU:
    09-16020548
    Product Type:
    Lighting
    Make:
    Universal Items
    $6.99
    Qty in Cart: 0
    Price:
    $6.99
    Subtotal:
  • Thread On Air Valve Knob 50 Caliber Bullet Style 5/8 Inch

    Thread On Air Valve Knob 50 Caliber Bullet Style 5/8 Inch

    UNITED PACIFIC

    $38.99
    5/8 Inch 50 Caliber Bullet Style Air Valve Knob Thread On* High Quality Air Valve Knob* Made Of Die Cast Aluminum* 50 Caliber Bullet Style* Removable Thread Lock Included To Prevent Loosening Of...
    09-15010325
    SKU:
    09-15010325
    Product Type:
    Interior
    Make:
    Universal Items
    $38.99
    Qty in Cart: 0
    Price:
    $38.99
    Subtotal:
  • Amber/Red & Purple Dual Function Mini Round Double Face LED Clearance, Marker & Auxiliary Light W/ Clear Lens

    Amber/Red & Purple Dual Function Mini Round Double Face LED Clearance, Marker & Auxiliary Light W/ Clear Lens

    TRUX ACCESSORIES

    $50.99
    Amber/Red & Purple Dual Function Mini Round Double Face LED Marker Light W/ Zinc Alloy Housing & Single Mount PostGive your truck a unique lighting upgrade with theAmber/Red & Purple Dual Function...
    09-160105324
    SKU:
    09-160105324
    Product Type:
    Lighting
    Make:
    Universal Items
    $50.99
    Qty in Cart: 0
    Price:
    $50.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Automatic Mack Drive Axles Haldex Type Slack Adjuster W/ 6 Inch 16 Degree Angled Arm Replaces 135.2832

    Automatic Mack Drive Axles Haldex Type Slack Adjuster W/ 6 Inch 16 Degree Angled Arm Replaces 135.2832

    AFTERMARKET

    $78.99
    Automatic Mack Drive Axles Haldex Type Slack Adjuster W/ 1.5 Inch - 28 Spline Diameter Replaces 135.2832* High Quality Slack Adjuster* Automatic, Mack Drive Axles, Haldex Type* 28 Spline Count* 16...
    09-05170517
    SKU:
    09-05170517
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $78.99
    Qty in Cart: 0
    Price:
    $78.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Automatic Gunite Type Slack Adjuster W/ 5.5 Inch Straight Arm Height

    Automatic Gunite Type Slack Adjuster W/ 5.5 Inch Straight Arm Height

    AFTERMARKET

    $78.99
    Automatic Gunite Type Slack Adjuster W/ 1.5 Inch - 28 Spline Diameter* High Quality Slack Adjuster* Automatic Gunite Type* 28 Spline Count* Straight Arm* Adjuster Dimensions:  - 5.5 Inch Arm Height ...
    09-05170516
    SKU:
    09-05170516
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $78.99
    Qty in Cart: 0
    Price:
    $78.99
    Subtotal:
  • FREE SHIPPING
    ABS Hydraulic Motor Kit W/ Hydraulic Pump & Motor Assembly Replaces S21808, S4784079472

    ABS Hydraulic Motor Kit W/ Hydraulic Pump & Motor Assembly Replaces S21808, S4784079472

    AFTERMARKET

    $1,047.99
    Meritor ABS Hydraulic Pump & Motor Assembly Replaces S21808, S4784079472* High Quality ABS Hydraulic Motor Kit* Meritor ABS Hydraulic Pump And Motor Assembly* Used By HABS-E Braking Electronics* Sold...
    09-05170518
    SKU:
    09-05170518
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $1,047.99
    Qty in Cart: 0
    Price:
    $1,047.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Black Poly Quarter Fender Kit 24 X 24 Inch W/ Round Tube Support Internal Mount Replaces 03101657, 1000-QF1900

    Black Poly Quarter Fender Kit 24 X 24 Inch W/ Round Tube Support Internal Mount Replaces 03101657, 1000-QF1900

    AFTERMARKET

    $109.99
    24 X 24 Inch Black Poly Quarter Fender Kit W/ Hardware Kit Replaces 03101657, 1000-QF1900* High Quality Quarter Fender Kit* Made Of Polycarbonate* Round Tube Support Internal Mount* Includes:  - (2)...
    09-11050636
    SKU:
    09-11050636
    Product Type:
    Rear Fenders
    Make:
    Universal Items
    $109.99
    Qty in Cart: 0
    Price:
    $109.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Automatic Drive Axle Haldex Type Slack Adjuster W/ 1.5 Inch 28 Spline Diameter Replaces 133.2830

    Automatic Drive Axle Haldex Type Slack Adjuster W/ 1.5 Inch 28 Spline Diameter Replaces 133.2830

    AFTERMARKET

    $78.99
    Automatic Drive Axle Haldex Type Slack Adjuster W/ 34 Degree Angled Arm & 2 Bolt Holes 5 And 6 Inch C To C Arm Height* High Quality Slack Adjuster* Automatic, Drive Axles, Haldex Type* 28 Spline...
    09-05170513
    SKU:
    09-05170513
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $78.99
    Qty in Cart: 0
    Price:
    $78.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Automatic Gunite Type Slack Adjuster W/ 5.5 Inch Straight Arm Height Replaces 138.1010

    Automatic Gunite Type Slack Adjuster W/ 5.5 Inch Straight Arm Height Replaces 138.1010

    AFTERMARKET

    $78.99
    Automatic Gunite Type Slack Adjuster W/ 1.5 Inch - 28 Spline Diameter* High Quality Slack Adjuster* Automatic Gunite Type* 10 Spline Count* Straight Arm* Clevis Kit Gunite Type Included* Adjuster...
    09-05170514
    SKU:
    09-05170514
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $78.99
    Qty in Cart: 0
    Price:
    $78.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Automatic, Drive Axles, Haldex Type Slack Adjuster W/ 5.5 Inch Arm Height & 1.5 Inch 28 Spline Diameter Replaces 135.2835

    Automatic, Drive Axles, Haldex Type Slack Adjuster W/ 5.5 Inch Arm Height & 1.5 Inch 28 Spline Diameter Replaces 135.2835

    AFTERMARKET

    $78.99
    Automatic, Drive Axles, Haldex Type Slack Adjuster W/ 34 Degree Angled Arm* High Quality Slack Adjuster* Automatic, Drive Axles, Haldex Type* 28 Spline Count* 34 Degree Angled Arm* Haldex Type...
    09-05170512
    SKU:
    09-05170512
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $78.99
    Qty in Cart: 0
    Price:
    $78.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Spring Brake Valve W/ 3/8 Inch NPT Control & Supply Port Replaces 170.110171

    Spring Brake Valve W/ 3/8 Inch NPT Control & Supply Port Replaces 170.110171

    AFTERMARKET

    $72.99
    Spring Brake Valve W/ 1/2 & 3/8 Inch Reservoir Ports, 2 - 3/8 Inch Delivery Port* High Quality Spring Brake Valve* Protected Reservoir Spring Brake Control Valve* Control And Supply Ports Are...
    09-05170509
    SKU:
    09-05170509
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $72.99
    Qty in Cart: 0
    Price:
    $72.99
    Subtotal:
  • FREE SHIPPING OVER $249
    MV3 Dash Valve W/ Integral Push=Lock-Connect Fittings & 4 M6 X 1 - 6H Mounting Holes Replaces 170.800622WF, 5006257

    MV3 Dash Valve W/ Integral Push=Lock-Connect Fittings & 4 M6 X 1 - 6H Mounting Holes Replaces 170.800622WF, 5006257

    AFTERMARKET

    $200.99
    MV3 Dash Valve 5.8 X 1.5 Inch C To C W/ 5 - 3/8 Inch PLC Ports* High Quality Dash Valve* MV3 Type Dash Control Module With Integral Push-Lock-Connect Fittings* Trailer Trip Pressure 25-45 PSI*...
    09-05170508
    SKU:
    09-05170508
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $200.99
    Qty in Cart: 0
    Price:
    $200.99
    Subtotal:
  • FREE SHIPPING OVER $249
    T18/24 Disc Brake Chamber W/ 2.5 Inch Ram Stroke & 4 Inch Push Rod Replaces 179.SB1824DB, LCP1824D

    T18/24 Disc Brake Chamber W/ 2.5 Inch Ram Stroke & 4 Inch Push Rod Replaces 179.SB1824DB, LCP1824D

    AFTERMARKET

    $162.99
    T18/24 Disc Brake Chamber 9.125 Chamber Height & 4.75 Inch C To C Mount Hole Distance* High Quality Disc Brake Chamber* T18/24 Disc Brake* Spring Brake Chamber Type* (2) M16 - 1.5 X 1.75 Inch...
    09-05170510
    SKU:
    09-05170510
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $162.99
    Qty in Cart: 0
    Price:
    $162.99
    Subtotal:
  • FREE SHIPPING OVER $249
    FF2 Type Full Function Trailer Valve W/ 2 Way Check & 4 Port Relay Valves Replaces 170.KN28601

    FF2 Type Full Function Trailer Valve W/ 2 Way Check & 4 Port Relay Valves Replaces 170.KN28601

    AFTERMARKET

    $118.99
    FF2 Type Full Function Trailer Valve W/ Control, Spring Brake, Supply, Reservoir & Delivery Ports* High Quality Trailer Valve* FF2 Type Full Function Valve* Combines The Functions of Pressure...
    09-05170504
    SKU:
    09-05170504
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $118.99
    Qty in Cart: 0
    Price:
    $118.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Air Brake Inversion Valve W/ Dust Shield On The Exhaust Port Replaces 14449, 280758

    Air Brake Inversion Valve W/ Dust Shield On The Exhaust Port Replaces 14449, 280758

    AFTERMARKET

    $58.99
    Air Brake Inversion Valve W/ 0.28 Inch Mounting Holes, Delivery, Supply & Control Ports* High Quality Air Brake Inversion Valve* Inlet Opening Descending Pressure Common Control: 45 PSI* Exhaust...
    09-05170505
    SKU:
    09-05170505
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $58.99
    Qty in Cart: 0
    Price:
    $58.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Automatic Trailer Axles Haldex Type Slack Adjuster W/ 6 Inch Straight Arm Height Replaces 133.2841

    Automatic Trailer Axles Haldex Type Slack Adjuster W/ 6 Inch Straight Arm Height Replaces 133.2841

    AFTERMARKET

    $78.99
    Automatic Trailer Axles Haldex Type Slack Adjuster W/ 1.5 Inch - 28 Spline Diameter Replaces 133.2841* High Quality Slack Adjuster* Automatic, Trailer Axles, Haldex Type* 28 Spline Count* Straight...
    09-05170515
    SKU:
    09-05170515
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $78.99
    Qty in Cart: 0
    Price:
    $78.99
    Subtotal:
  • FREE SHIPPING OVER $249
    MV3 Type Dash Valve W/ Integral Push-Lock-Connect Fittings Replaces 170.KN20619, 20560009

    MV3 Type Dash Valve W/ Integral Push-Lock-Connect Fittings Replaces 170.KN20619, 20560009

    AFTERMARKET

    $156.99
    MV3 Type Dash Valve 3.5 X 5.33 Inch C To C W/ 4 0.3 Inch Diameter Bolt Holes & 6 - 3/8 Inch PLC Ports* High Quality Dash Valve* MV3 Type Dash Control Module With Integral Push-Lock-Connect Fittings*...
    09-05170506
    SKU:
    09-05170506
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $156.99
    Qty in Cart: 0
    Price:
    $156.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BPR1 Type Brake Proportioning Relay Valve W/ 5.5 PSI Crack Pressure & Mounting Bracket Replaces 170.065146

    BPR1 Type Brake Proportioning Relay Valve W/ 5.5 PSI Crack Pressure & Mounting Bracket Replaces 170.065146

    AFTERMARKET

    $61.99
    BPR1 Type Brake Proportioning Relay Valve W/ Control, Service, Supply & Deliver Ports* High Quality Relay Valve* BPR1 Type Brake Proportioning Relay Valve* 5.5 PSI Crack Pressure* Mounting Bracket...
    09-05170500
    SKU:
    09-05170500
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $61.99
    Qty in Cart: 0
    Price:
    $61.99
    Subtotal:
  • FREE SHIPPING OVER $249
    SR7 Type Spring Brake Modulating Valve Replaces 170.K021558

    SR7 Type Spring Brake Modulating Valve Replaces 170.K021558

    AFTERMARKET

    $162.99
    SR7 Type Spring Brake Modulating Valve W/ Control, Balance, Supply & Delivery Ports* High Quality Spring Brake Valve* SR7 Type Spring Brake Modulating Valve* Ports:  - (1) 1/4 Inch NPT Control Port ...
    09-05170501
    SKU:
    09-05170501
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $162.99
    Qty in Cart: 0
    Price:
    $162.99
    Subtotal:
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Adding your products to cart

Shop Kenworth T800 Parts & Accessories

Restore or customize your Class 7 or 8 vocational rig with our massive inventory of heavy-duty Kenworth T800 parts and Kenworth T800 accessories. We stock direct-fit aftermarket components from top-tier brands to keep your heavy-hauler running strong and looking sharp.

Direct-Fit Kenworth T800 Replacement Parts

Reduce downtime with our selection of commercial-grade repair components. Find durable replacement parts for every area of your rig, including drivetrain components, HVAC systems, engine cooling (CACs and radiators), brake parts, and steering U-joints.

Exterior Chrome & Custom Lighting

Build a custom show rig or upgrade your daily driver with exact-fit exterior accessories:

Kenworth T800 Interior Accessories

Improve sleeper bunk comfort, in-cab organization, and dashboard appeal. Refresh your cabin with direct-fit Kenworth T800 interior dash panels and heavy-duty Kenworth T800 cab flooring upgrades.

Why Buy Kenworth T800 Parts From 4 State Trucks?

Dealership OEM parts are often expensive and backordered. Our aftermarket and OEM-equivalent parts deliver the reliability you need to stay on the road, alongside several key advantages:

Better Value: Significant cost savings and faster shipping replacement times than OEM.

Guaranteed Fitment: Commercial-grade parts engineered exactly for your truck's year and model.

Maximum Customization: A broader array of styles, finishes, and designs than the factory offers.

For 45 years, owner-operators, diesel repair shops, and fleet managers have trusted 4 State Trucks. Get fast shipping and real-time support from a team that knows and loves big rigs.

Frequently Asked Questions About Kenworth T800 Parts

What years are your Kenworth T800 parts compatible with, and how do I verify fitment for my specific truck?

Our Kenworth T800 parts are designed to fit models from 1987 through 2014, though specific compatibility varies by part. To verify fitment, check your truck's OEM plate located on the driver's side door jamb and note your exact model year and configuration (hood length, axle configuration). For bumpers and exterior parts, also note whether you have a set-forward or set-back front axle. When in doubt, contact our support team with your OEM and we'll confirm compatibility before you order.

Are your T800 bumpers made from chrome-plated steel or stainless steel, and what's the difference in durability?

We offer both chrome-plated steel and polished stainless steel bumpers for the T800. Chrome-plated bumpers provide an excellent mirror finish at a lower price point but require regular maintenance to prevent rust, especially in areas with road salt. Stainless steel bumpers cost more initially but resist corrosion without special care and maintain their appearance longer. For trucks operating in harsh weather conditions or coastal areas, we recommend stainless steel for its superior longevity.

Do I need to drill new holes or make modifications to install replacement bumpers and grilles on my T800?

Most of our T800 replacement bumpers and grilles are designed as direct bolt-on replacements using existing mounting points. However, if you're upgrading from a standard bumper to a heavy-duty or custom style, some drilling may be required. Each product page specifies whether modifications are needed. Basic installation typically requires standard hand tools and takes 2-4 hours. We include detailed instructions with each part, and mounting hardware is included unless otherwise noted.

What's the difference between OEM-style and aftermarket T800 parts in terms of fit and quality?

OEM-style parts are manufactured to match original Kenworth specifications exactly, ensuring precise fit and finish. Aftermarket options often provide enhanced features like heavier gauge steel, additional chrome plating layers, or improved mounting systems. Both meet DOT requirements where applicable. Aftermarket parts typically offer better value and may include upgrades like pre-drilled light holes or reinforced mounting brackets that weren't available on original equipment.

Can I install T800 parts myself, or should I have a shop do it? What special tools are required?

Many T800 parts like mirror brackets, grab handles, and smaller accessories can be installed with basic tools in your own shop. Larger components like bumpers, hoods, and fenders are manageable with two people and standard tools including socket sets, wrenches, and a drill. You'll need a torque wrench for critical fasteners. Professional installation is recommended for air ride suspensions, complete exhaust systems, or if you're uncomfortable working with heavy components. Always support heavy parts properly during installation to prevent injury or damage.


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