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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
  • Subtotal
  • BESTfit DEF Sensor Head Assembly Replaces 3600932, 5913429, 714898

    BESTfit DEF Sensor Head Assembly Replaces 3600932, 5913429, 714898

    BESTFIT TRUCK PARTS

    $887.99
    Diesel Exhaust Fluid Sensor Head Assembly By BESTfitEnsure consistent emissions performance with the BESTfit DEF Sensor Head Assembly. Built for CAT C3.6 and C4.4 engines, this assembly accurately...
    29-06070020
    SKU:
    29-06070020
    Product Type:
    Fuel Tanks
    Height Options:
    18 Inch
    Make:
    Universal Items
    $887.99
    Qty in Cart: 0
    Price:
    $887.99
    Subtotal:
  • BESTfit DEF Fluid Level & Temperature Sensor For Paccar Replaces AP65148, GA617002, 216127002

    BESTfit DEF Fluid Level & Temperature Sensor For Paccar Replaces AP65148, GA617002, 216127002

    BESTFIT TRUCK PARTS

    $286.99
    DEF Fluid Level & Temperature Sensor By BESTfit Replaces AP65148, GA617002, 216127002 Fits PaccarSupport optimal SCR emissions performance with the BESTfit DEF Fluid Level & Temperature Sensor, a...
    29-06070030
    SKU:
    29-06070030
    Product Type:
    Fuel Tanks
    Make:
    Universal Items
    $286.99
    Qty in Cart: 0
    Price:
    $286.99
    Subtotal:
  • BESTfit DEF Pump 2.2 For Cummins Replaces 098644D207, 2P0131113B, 5EL056

    BESTfit DEF Pump 2.2 For Cummins Replaces 098644D207, 2P0131113B, 5EL056

    BESTFIT TRUCK PARTS

    $1,138.99
    Diesel Exhaust Fluid Pump 2.2 By BESTfit Replaces 098644D207, 2P0131113B, 5EL056 Fits CumminsMaximize the efficiency of your emissions system with the BESTfit DEF Pump 2.2, a reliable replacement for...
    29-06070027
    SKU:
    29-06070027
    Style Options:
    Cummins
    Product Type:
    Fuel Tanks
    Make:
    Universal Items
    $1,138.99
    Qty in Cart: 0
    Price:
    $1,138.99
    Subtotal:
  • BESTfit Doser Injector Mounting Hardware Kit For Cummins

    BESTfit Doser Injector Mounting Hardware Kit For Cummins

    BESTFIT TRUCK PARTS

    $89.99
    Doser Injector Mounting Hardware Kit By BESTfit Replaces 2120750011, 4376837, NMD4376837 Fits Cummins EngineKeep your doser injector securely mounted with the BESTfit Doser Injector Mounting Hardware...
    29-06070021
    SKU:
    29-06070021
    Product Type:
    Fuel Tanks
    Material Options:
    Stainless Steel
    Style Options:
    Cummins
    Make:
    Universal Items
    $89.99
    Qty in Cart: 0
    Price:
    $89.99
    Subtotal:
  • BESTfit Doser Injector Gasket For Cummins Engine Replaces 4354280, 2885890, A029Y977

    BESTfit Doser Injector Gasket For Cummins Engine Replaces 4354280, 2885890, A029Y977

    BESTFIT TRUCK PARTS

    $50.99
    Doser Injector Gasket Gasket By BESTfit Replaces 4354280, 2885890, A029Y977 Fits Cummins EngineMaintain proper injector sealing with the BESTfit Doser Injector Gaske for Cummins engines. Constructed...
    29-06070023
    SKU:
    29-06070023
    Product Type:
    Fuel Tanks
    Material Options:
    Stainless Steel
    Style Options:
    Cummins
    Make:
    Universal Items
    $50.99
    Qty in Cart: 0
    Price:
    $50.99
    Subtotal:
  • BESTfit DEF Sensor Head Assembly Replaces 2515991C2, 4378048, 5510447

    BESTfit DEF Sensor Head Assembly Replaces 2515991C2, 4378048, 5510447

    BESTFIT TRUCK PARTS

    $1,160.99
    Diesel Exhaust Fluid Sensor Head Assembly By BESTfitKeep your emissions system running efficiently with the BESTfit DEF Sensor Head Assembly, a direct replacement for part numbers 2515991C2, 4378048,...
    29-06070026
    SKU:
    29-06070026
    Height Options:
    17 1/2 Inch
    Product Type:
    Fuel Tanks
    Make:
    Universal Items
    $1,160.99
    Qty in Cart: 0
    Price:
    $1,160.99
    Subtotal:
  • BESTfit DEF Doser Injector Kit For Cummins Engine Replaces 2121301002

    BESTfit DEF Doser Injector Kit For Cummins Engine Replaces 2121301002

    BESTFIT TRUCK PARTS

    $131.99
    Diesel Exhuast Fluid Injector Kit By BESTfit Replaces 2121301002 Fits Cummins EngineKeep your DEF system performing reliably with the BESTfit DEF Doser Injector Kit a replacement for Cummins engines...
    29-06070022
    SKU:
    29-06070022
    Product Type:
    Fuel Tanks
    Make:
    Universal Items
    $131.99
    Qty in Cart: 0
    Price:
    $131.99
    Subtotal:
  • BESTfit DEF Fluid Level & Temperature Sensor Replaces 30B1514, 46850454, 621246

    BESTfit DEF Fluid Level & Temperature Sensor Replaces 30B1514, 46850454, 621246

    BESTFIT TRUCK PARTS

    $1,263.99
    Diesel Exhaust Fluid Fluid Level & Temperature Sensor By BESTfitKeep your DEF system functioning properly with the BESTfit DEF Fluid Level & Temperature Sensor, replacing 30B1514, 46850454, and...
    29-06070019
    SKU:
    29-06070019
    Product Type:
    Fuel Tanks
    Height Options:
    18 Inch
    Make:
    Universal Items
    $1,263.99
    Qty in Cart: 0
    Price:
    $1,263.99
    Subtotal:
  • BESTfit DEF Sensor Head Assembly Replaces 077905V01501, 21640012, 46699859

    BESTfit DEF Sensor Head Assembly Replaces 077905V01501, 21640012, 46699859

    BESTFIT TRUCK PARTS

    $887.99
    Diesel Exhaust Fluid Sensor Head Assembly By BESTfitDepend on the BESTfit DEF Sensor Head Assembly for reliable DEF system performance. Designed for CAT C3.6 and C4.4 engines, it monitors diesel...
    29-06070018
    SKU:
    29-06070018
    Product Type:
    Fuel Tanks
    Height Options:
    11 Inch
    Make:
    Universal Items
    $887.99
    Qty in Cart: 0
    Price:
    $887.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Jump Starter 12 Volt 4000A

    Jump Starter 12 Volt 4000A

    AUTOMANN USA

    $157.99
    12 V. 4000A Portable Jump StarterStay ready for unexpected breakdowns with the Jump Starter 12 Volt 4000A, built for heavy-duty truck starting power. This high-performance portable unit is designed...
    09-21010001
    SKU:
    09-21010001
    Product Type:
    Tools
    Make:
    Universal Items
    $157.99
    Qty in Cart: 0
    Price:
    $157.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Jump Starter 12 Volt 3000A

    Jump Starter 12 Volt 3000A

    AUTOMANN USA

    $116.99
    12 V 3000A Portable Jump StarterStay prepared for unexpected breakdowns with the Jump Starter 12 Volt 3000A, built for medium-duty truck use. This portable jump starter delivers reliable 12-volt...
    09-21010002
    SKU:
    09-21010002
    Product Type:
    Tools
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $116.99
    Qty in Cart: 0
    Price:
    $116.99
    Subtotal:
  • FREE SHIPPING
    Lithium-Ion Jump Starter 12/24 Volts

    Lithium-Ion Jump Starter 12/24 Volts

    AUTOMANN USA

    $632.99
    12/24 V. Portable Jump StarterGet back on the road faster with the Lithium-Ion Jump Starter, engineered for heavy-duty commercial and fleet truck use. This high-quality portable jump starter delivers...
    09-21010000
    SKU:
    09-21010000
    Product Type:
    Tools
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $632.99
    Qty in Cart: 0
    Price:
    $632.99
    Subtotal:
  • BESTfit DEF Doser Injector Kit Replaces 043028, 2121300002 For Cummins

    BESTfit DEF Doser Injector Kit Replaces 043028, 2121300002 For Cummins

    BESTFIT TRUCK PARTS

    $131.99
    Diesel Exhaust Fluid Doser Injector Kit By BESTfit Replaces 043028, 2121300002 Fits CumminsKeep emissions systems performing efficiently with the BESTfit DEF Doser Injector Kit, a direct replacement...
    09-06070004
    SKU:
    09-06070004
    Product Type:
    Fuel Tanks
    Make:
    Universal Items
    $131.99
    Qty in Cart: 0
    Price:
    $131.99
    Subtotal:
  • BESTfit DEF Filter Replaces 37332, 5002862, AP65142

    BESTfit DEF Filter Replaces 37332, 5002862, AP65142

    BESTFIT TRUCK PARTS

    $144.99
    Diesel Exhaust Fluid Filter By BESTfitKeep your DEF system operating cleanly and efficiently with the BESTfit DEF Filter, designed as a replacement for 37332, 5002862, and AP65142 in heavy-duty...
    09-06070001
    SKU:
    09-06070001
    Product Type:
    Fuel Tanks
    Make:
    Universal Items
    $144.99
    Qty in Cart: 0
    Price:
    $144.99
    Subtotal:
  • BESTfit DEF Doser Injector Kit For Cummins Replaces 043027, 2121300003, 321353

    BESTfit DEF Doser Injector Kit For Cummins Replaces 043027, 2121300003, 321353

    BESTFIT TRUCK PARTS

    $131.99
    Diesel Exhaust Fluid Doser Injector Kit By BESTfit Replaces 043027, 2121300003, 321353 Fits CumminsMaintain accurate emissions dosing with the BESTfit DEF Doser Injector Kit, replacing 043027,...
    09-06070002
    SKU:
    09-06070002
    Product Type:
    Fuel Tanks
    Make:
    Universal Items
    $131.99
    Qty in Cart: 0
    Price:
    $131.99
    Subtotal:
  • BESTfit DEF Doser Injector Kit Replaces 2121300001 For Cummins

    BESTfit DEF Doser Injector Kit Replaces 2121300001 For Cummins

    BESTFIT TRUCK PARTS

    $131.99
    Diesel Exhaust Fluid Doser Injector Kit By BESTfit Fits CumminsDepend on strong emissions system performance with the BESTfit DEF Doser Injector Kit, a replacement for 2121300001. Designed for...
    09-06070003
    SKU:
    09-06070003
    Position:
    Kit Full
    Product Type:
    Fuel Tanks
    Make:
    Universal Items
    $131.99
    Qty in Cart: 0
    Price:
    $131.99
    Subtotal:
  • BESTfit Charge Air Cooler 27.5 X 2 Inch Replaces 16506, 2310072, 4861905002 For Kenworth T600, T800, C500 & W900L/B

    BESTfit Charge Air Cooler 27.5 X 2 Inch Replaces 16506, 2310072, 4861905002 For Kenworth T600, T800, C500 & W900L/B

    BESTFIT TRUCK PARTS

    $915.99
    Tube & Fin Charge Air Cooler W/ 4 Inch Inlet & Outlet By BESTfit Replaces 16506, 2310072, 4861905002Improve engine efficiency and performance with the BESTfit Charge Air Cooler for Kenworth T600,...
    02-0701002
    SKU:
    02-0701002
    Product Type:
    Engine Parts
    Width Options:
    27 1/2 Inch
    Make:
    Kenworth
    $915.99
    Qty in Cart: 0
    Price:
    $915.99
    Subtotal:
  • BESTfit Plastic Aluminum Radiator 38.9375 X 34.125 X 1.625 Inch 1 Row Replaces 3818108, HK179100,TR7565P For Kenworth

    BESTfit Plastic Aluminum Radiator 38.9375 X 34.125 X 1.625 Inch 1 Row Replaces 3818108, HK179100,TR7565P For Kenworth

    BESTFIT TRUCK PARTS

    $973.99
    Radiator W/ 2.5 Inch Inlet & 2.5 Inch Outlet By BESTfit Replaces 3818108, HK179100,TR7565PMaintain optimal engine temperature and performance with the BESTfit Plastic/Aluminum Radiator for Kenworth...
    02-07020027
    SKU:
    02-07020027
    Material Options:
    Plastic/Poly
    Width Options:
    40 Inch
    Product Type:
    Engine Parts
    Height Options:
    34 Inch
    Make:
    Kenworth
    $973.99
    Qty in Cart: 0
    Price:
    $973.99
    Subtotal:
  • Stage 1 Billet Wheel VGT Turbo Charger W/ Actuator For Paccar MX-13

    Stage 1 Billet Wheel VGT Turbo Charger W/ Actuator For Paccar MX-13

    BULLY DOG

    $5,000.00
    Choose Option(s) to see description.Fitment** Fits Models W/ PACCAR MX-13 Engines 2010-2013Stage 1 Billet Wheel VGT Turbo Charger W/ Actuator Replaces 5355091 For Paccar MX-13Paccar MX-13 Stage 1 VGT...
    PPR_300802
    SKU:
    PPR_300802
    Material Options:
    Billet Aluminum
    Product Type:
    Engine Parts
    Style Options:
    Paccar
    Make:
    Universal Items
    Make:
    Other - Semi-Truck
    $5,000.00
    Qty in Cart: 0
    Price:
    $5,000.00
    Subtotal:
  • Bully Dog Stage 1 Billet Wheel VGT Turbo Charger W/ Actuator For Cummins X15 CM2350 & CM2450

    Bully Dog Stage 1 Billet Wheel VGT Turbo Charger W/ Actuator For Cummins X15 CM2350 & CM2450

    BULLY DOG

    $6,000.00
    Experience more responsive power and improved engine efficiency with this Stage 1 Billet Wheel VGT Turbo Charger with Actuator, designed for Cummins X15 Low or High HP engines and replacing 5459710...
    PPR_300798
    SKU:
    PPR_300798
    Material Options:
    Billet Aluminum
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Other - Semi-Truck
    Make:
    Universal Items
    $6,000.00
    Qty in Cart: 0
    Price:
    $6,000.00
    Subtotal:
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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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