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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.
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  • Qty in Cart
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  • BESTfit 2.5 Inch 304 Stainless Steel V- Band Clamp

    BESTfit 2.5 Inch 304 Stainless Steel V- Band Clamp

    BESTFIT TRUCK PARTS

    $30.99
    2.5 Inch Stainless Steel V- Band Clamp By BESTfitEnsure leak-free, heavy-duty connections with the BESTfit 2.5 Inch 304 Stainless Steel V-Band Clamp. Its precision 2.5-inch diameter and robust 304...
    GR-VB-300C
    SKU:
    GR-VB-300C
    Product Type:
    Exhaust
    Make:
    Universal Items
    $30.99
    Qty in Cart: 0
    Price:
    $30.99
    Subtotal:
  • BESTfit 7 Inch Zinc Plated Rain Cap

    BESTfit 7 Inch Zinc Plated Rain Cap

    BESTFIT TRUCK PARTS

    $173.03
    7 Inch Rain Cap By BESTfitPrevent water and debris from entering your exhaust with the BESTfit 7 Inch Zinc Plated Rain Cap. Made for 7-inch straight stack openings, this zinc-plated steel cap offers...
    GR-RC-700
    SKU:
    GR-RC-700
    Product Type:
    Exhaust
    Make:
    Universal Items
    $173.03
    Qty in Cart: 0
    Price:
    $173.03
    Subtotal:
  • BESTfit 7-5.5 Inch 90 Degree Rubber Reducer Elbow

    BESTfit 7-5.5 Inch 90 Degree Rubber Reducer Elbow

    BESTFIT TRUCK PARTS

    $87.99
    7-5.5 Inch 90 Degree Rubber Reducer Elbow By BESTfitKeep your air intake system performing at peak efficiency with the BESTfit 7-5.5 Inch 90 Degree Rubber Reducer Elbow, engineered for a smooth...
    GR-RRE-790-55
    SKU:
    GR-RRE-790-55
    Degree Options:
    90
    Product Type:
    Exhaust
    Material Options:
    Rubber
    Diameter Options:
    7 Inch
    Make:
    Universal Items
    $87.99
    Qty in Cart: 0
    Price:
    $87.99
    Subtotal:
  • BESTfit 4 Inch Aluminized Steel Butt Joint Clamp

    BESTfit 4 Inch Aluminized Steel Butt Joint Clamp

    BESTFIT TRUCK PARTS

    $15.85
    4 Inch Aluminized Butt Joint Clamp By BESTfitReplace worn clamps with the BESTfit 4 Inch Aluminized Steel Butt Joint Clamp. Engineered from premium aluminized steel and designed for butt joint...
    GR-PF-4ABT
    SKU:
    GR-PF-4ABT
    Product Type:
    Exhaust
    Make:
    Universal Items
    $15.85
    Qty in Cart: 0
    Price:
    $15.85
    Subtotal:
  • BESTfit 6-5 Inch ID Rubber Reducer Hose

    BESTfit 6-5 Inch ID Rubber Reducer Hose

    BESTFIT TRUCK PARTS

    $37.99
    6-5 Inch ID Rubber Reducer Hose By BESTfitReplace worn or damaged intake connections with the BESTfit 6-5 Inch ID Rubber Reducer Hose, built for heavy-duty trucks. This high-quality 6-inch rubber...
    GR-RHH-6-5
    SKU:
    GR-RHH-6-5
    Product Type:
    Exhaust
    Material Options:
    Rubber
    Diameter Options:
    6 To 5 Inch
    Make:
    Universal Items
    $37.99
    Qty in Cart: 0
    Price:
    $37.99
    Subtotal:
  • BESTfit 7-6 Inch 90 Degree Rubber Reducer Elbow

    BESTfit 7-6 Inch 90 Degree Rubber Reducer Elbow

    BESTFIT TRUCK PARTS

    $129.99
    7-6 Inch 90 Degree Rubber Reducer Elbow By BESTfitAchieve secure, leak-free connections in your heavy-duty truck's intake system with the BESTfit 7-6 Inch 90 Degree Rubber Reducer Elbow. Designed to...
    GR-RRE-790-6
    SKU:
    GR-RRE-790-6
    Degree Options:
    90
    Product Type:
    Exhaust
    Style Options:
    Elbow
    Material Options:
    Rubber
    Diameter Options:
    7 Inch
    Make:
    Universal Items
    $129.99
    Qty in Cart: 0
    Price:
    $129.99
    Subtotal:
  • BESTfit 5-6 Inch Exhaust Pipe Hook

    BESTfit 5-6 Inch Exhaust Pipe Hook

    BESTFIT TRUCK PARTS

    $9.26
    5-6 Inch Exhaust Pipe Hook By BESTfitSimplify exhaust pipe installation with the BESTfit 5-6 Inch Exhaust Pipe Hook, built to support 5- to 6-inch pipes. This high-quality hook provides stable...
    GR-PH-6A
    SKU:
    GR-PH-6A
    Product Type:
    Exhaust
    Make:
    Universal Items
    $9.26
    Qty in Cart: 0
    Price:
    $9.26
    Subtotal:
  • BESTfit 48 Inch Aluminized Steel Heat Shield W/ Round Holes

    BESTfit 48 Inch Aluminized Steel Heat Shield W/ Round Holes

    BESTFIT TRUCK PARTS

    $179.99
    48 Inch Aluminized 180 Degree Heat Shield W/ Round Holes By BESTfitSafeguard surrounding components from high exhaust temperatures with the BESTfit 48 Inch Aluminized Steel Heat Shield. The...
    GR-PG-G
    SKU:
    GR-PG-G
    Material Options:
    Aluminum
    Length Options:
    48 Inch
    Degree Options:
    180
    Product Type:
    Exhaust
    Make:
    Universal Items
    $179.99
    Qty in Cart: 0
    Price:
    $179.99
    Subtotal:
  • BESTfit 3.5 Inch Guillotine Single Edge Saddle Clamp

    BESTfit 3.5 Inch Guillotine Single Edge Saddle Clamp

    BESTFIT TRUCK PARTS

    $6.89
    3.5 Inch Zinc Plated Guillotine Single Edge Saddle Clamp By BESTfitThe BESTfit 3.5 Inch Guillotine Single Edge Saddle Clamp ensures tight, reliable exhaust connections for commercial trucks. Its...
    GR-RB-35ZN
    SKU:
    GR-RB-35ZN
    Product Type:
    Exhaust
    Make:
    Universal Items
    $6.89
    Qty in Cart: 0
    Price:
    $6.89
    Subtotal:
  • BESTfit 10 X 15 Inch Aluminized Steel Oval Muffler Hanger

    BESTfit 10 X 15 Inch Aluminized Steel Oval Muffler Hanger

    BESTFIT TRUCK PARTS

    $72.09
    10 X 15 Inch Oval Muffler Hanger By BESTfitSecure your truck's exhaust system with the BESTfit 10 x 15 Inch Oval Muffler Hanger. Crafted from durable aluminized steel and designed for horizontal...
    GR-OMH-1015
    SKU:
    GR-OMH-1015
    Product Type:
    Exhaust
    Make:
    Universal Items
    $72.09
    Qty in Cart: 0
    Price:
    $72.09
    Subtotal:
  • BESTfit 4 ID X 4.21 OD X 8 Inch Hot Side CAC Hose

    BESTfit 4 ID X 4.21 OD X 8 Inch Hot Side CAC Hose

    BESTFIT TRUCK PARTS

    $90.99
    4 ID X 4.21 OD X 8 Inch Hot Side CAC Hose By BESTfitDeliver dependable airflow in your EGR hot-side system with the BESTfit 4 ID x 4.21 OD x 8 Inch CAC Hose. This high-quality silicone hose provides...
    GR-HCAC-20074
    SKU:
    GR-HCAC-20074
    Length Options:
    6 Inch
    Material Options:
    Silicone
    Color:
    Red
    Diameter Options:
    4 Inch
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $90.99
    Qty in Cart: 0
    Price:
    $90.99
    Subtotal:
  • BESTfit 9.5 Inch ID X 10.25 Inch OD DPF Gasket For Cummins ISB 6.7L

    BESTfit 9.5 Inch ID X 10.25 Inch OD DPF Gasket For Cummins ISB 6.7L

    BESTFIT TRUCK PARTS

    $18.59
    9.5 Inch ID X 10.25 Inch OD DPF Gasket By BESTfitMaintain a leak-free DPF system on your Cummins ISB 6.7L with the BESTfit 9.5 Inch ID x 10.25 Inch OD DPF Gasket. Crafted from high-quality materials,...
    GR-GRDPFG-1051-10
    SKU:
    GR-GRDPFG-1051-10
    Product Type:
    Exhaust
    Style Options:
    Cummins
    Make:
    Universal Items
    $18.59
    Qty in Cart: 0
    Price:
    $18.59
    Subtotal:
  • BESTfit 4/4.5 ID X 6.5 Inch CAC Hose

    BESTfit 4/4.5 ID X 6.5 Inch CAC Hose

    BESTFIT TRUCK PARTS

    $113.99
    4/4.5 ID X 6.5 Inch Hot Side CAC Hose By BESTfitEnsure smooth airflow and long-term performance with the BESTfit 4/4.5 ID x 6.5 Inch CAC Hose, designed for EGR hot-side systems. Made of high-quality...
    GR-HCAC-12842
    SKU:
    GR-HCAC-12842
    Color:
    Red
    Product Type:
    Engine Parts
    Diameter Options:
    4 Inch
    Material Options:
    Silicone
    Length Options:
    6 1/2 Inch
    Make:
    Universal Items
    $113.99
    Qty in Cart: 0
    Price:
    $113.99
    Subtotal:
  • BESTfit 10 X 44.5 Inch Aluminized Steel Muffler W/ 5 Inch Inlet/ Outlet

    BESTfit 10 X 44.5 Inch Aluminized Steel Muffler W/ 5 Inch Inlet/ Outlet

    BESTFIT TRUCK PARTS

    $204.99
    10 X 44.5 Inch Muffler W/ 5 Inch Inlet/ Outlet By BESTfitMaintain smooth and quiet exhaust operation with the BESTfit 10 x 44.5 Inch Type 1 Muffler. Constructed from aluminized steel, this round...
    GR-M-130
    SKU:
    GR-M-130
    Product Type:
    Exhaust
    Make:
    Universal Items
    $204.99
    Qty in Cart: 0
    Price:
    $204.99
    Subtotal:
  • BESTfit 2 Inch X 25 Ft Galvanized Steel Flex Hose

    BESTfit 2 Inch X 25 Ft Galvanized Steel Flex Hose

    BESTFIT TRUCK PARTS

    $151.99
    2 Inch X 25 Ft Galvanized Flex Hose By BESTfitKeep your system running smoothly with the BESTfit 2 Inch x 25 Ft Galvanized Steel Flex Hose. This high-quality galvanized metal hose measures 2 inches...
    GR-G15-2300
    SKU:
    GR-G15-2300
    Style Options:
    Standard
    Finish Options:
    Galvanized
    Length Options:
    300 Inch
    Diameter Options:
    2 Inch
    Product Type:
    Exhaust
    Material Options:
    Steel
    Make:
    Universal Items
    $151.99
    Qty in Cart: 0
    Price:
    $151.99
    Subtotal:
  • BESTfit 6 Inch X 10 Ft Galvanized Steel Flex Hose

    BESTfit 6 Inch X 10 Ft Galvanized Steel Flex Hose

    BESTFIT TRUCK PARTS

    $169.99
    6 Inch X 10 Ft Galvanized Flex Hose By BESTfitDepend on the BESTfit 6 Inch x 10 Ft Galvanized Steel Flex Hose for secure, corrosion-resistant connections in heavy-duty applications. Crafted from...
    GR-G15-6120
    SKU:
    GR-G15-6120
    Finish Options:
    Galvanized
    Style Options:
    Standard
    Diameter Options:
    6 Inch
    Length Options:
    120 Inch
    Product Type:
    Exhaust
    Material Options:
    Steel
    Make:
    Universal Items
    $169.99
    Qty in Cart: 0
    Price:
    $169.99
    Subtotal:
  • BESTfit 3.5 ID X 3.71 OD X 6 Inch Hot Side CAC Hose

    BESTfit 3.5 ID X 3.71 OD X 6 Inch Hot Side CAC Hose

    BESTFIT TRUCK PARTS

    $62.99
    3.5 ID X 3.71 OD X 6 Inch Hot Side CAC Hose By BESTfitProtect your engine and maintain smooth EGR operation with the BESTfit 3.5 ID x 3.71 OD x 6 Inch Hot Side CAC Hose. Constructed from durable...
    GR-HCAC-20071
    SKU:
    GR-HCAC-20071
    Material Options:
    Silicone
    Color:
    Red
    Length Options:
    6 Inch
    Product Type:
    Engine Parts
    Diameter Options:
    3 1/2 Inch
    Make:
    Universal Items
    $62.99
    Qty in Cart: 0
    Price:
    $62.99
    Subtotal:
  • BESTfit 3/3.5 ID X 3.21/3.71 OD X 6 Inch CAC Hose

    BESTfit 3/3.5 ID X 3.21/3.71 OD X 6 Inch CAC Hose

    BESTFIT TRUCK PARTS

    $61.99
    3/3.5 ID X 3.21/3.71 OD X 6 Inch Cold CAC Hose By BESTfitThe BESTfit 3/3.5 ID x 3.21/3.71 OD x 6 Inch CAC Hose delivers dependable charge air flow for EGR cold side systems. Made from...
    GR-CCAC-20077
    SKU:
    GR-CCAC-20077
    Material Options:
    Silicone
    Product Type:
    Engine Parts
    Length Options:
    6 Inch
    Make:
    Universal Items
    $61.99
    Qty in Cart: 0
    Price:
    $61.99
    Subtotal:
  • BESTfit 4 X 12 Inch Galvanized Steel Flex Hose

    BESTfit 4 X 12 Inch Galvanized Steel Flex Hose

    BESTFIT TRUCK PARTS

    $19.29
    4 X 12 Inch Galvanized Flex Hose By BESTfitBuilt for durability and dependable operation, the BESTfit 4 x 12 Inch Galvanized Steel Flex Hose provides corrosion-resistant, flexible performance in a...
    GR-G15-412
    SKU:
    GR-G15-412
    Material Options:
    Steel
    Diameter Options:
    4 Inch
    Product Type:
    Exhaust
    Length Options:
    12 Inch
    Finish Options:
    Galvanized
    Style Options:
    Flex
    Make:
    Universal Items
    $19.29
    Qty in Cart: 0
    Price:
    $19.29
    Subtotal:
  • BESTfit 4 ID X 6 Inch Aluminized Steel Coupler

    BESTfit 4 ID X 6 Inch Aluminized Steel Coupler

    BESTFIT TRUCK PARTS

    $26.99
    4 ID X 6 Inch Aluminized Coupler By BESTfitEnsure long-lasting and secure pipe connections with the BESTfit 4 ID x 6 Inch Aluminized Steel Coupler. Constructed from high-quality 16-gauge aluminized...
    GR-CP-46A
    SKU:
    GR-CP-46A
    Product Type:
    Exhaust
    Make:
    Universal Items
    $26.99
    Qty in Cart: 0
    Price:
    $26.99
    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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