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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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  • BESTfit Detroit Diesel DPF For Detroit DD13/DD15 Engines Replaces 6804913594, AP70116, GESI0051

    BESTfit Detroit Diesel DPF For Detroit DD13/DD15 Engines Replaces 6804913594, AP70116, GESI0051

    BESTFIT TRUCK PARTS

    $992.99
    DPF By BESTfit Replaces 6804913594, AP70116, GESI0051 Fits Detroit DD13/DD15 EnginesUpgrade your emissions system with the BESTfit Detroit Diesel DPF, a direct replacement for OEM part numbers...
    29-08090006
    SKU:
    29-08090006
    Product Type:
    Exhaust
    Style Options:
    Detroit
    Make:
    Universal Items
    $992.99
    Qty in Cart: 0
    Price:
    $992.99
    Subtotal:
  • BESTfit CAT Water Pump For Caterpillar 3176B, C10 & C12 Engine Replaces 1588053, 99300HD, US70

    BESTfit CAT Water Pump For Caterpillar 3176B, C10 & C12 Engine Replaces 1588053, 99300HD, US70

    BESTFIT TRUCK PARTS

    $409.99
    Water Pump By BESTfit Replaces 1588053, 99300HD, US70 Fits Caterpillar 3176B, C10 & C12 EngineUpgrade your engine cooling system with the BESTfit CAT Water Pump, a direct replacement for OEM part...
    29-07120165
    SKU:
    29-07120165
    Style Options:
    Caterpillar
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $409.99
    Qty in Cart: 0
    Price:
    $409.99
    Subtotal:
  • BESTfit Perkins Water Pump For Caterpillar Perkins C4.4, C6.6 & C7.1 Replaces 2772913, 4131A062, 4854895

    BESTfit Perkins Water Pump For Caterpillar Perkins C4.4, C6.6 & C7.1 Replaces 2772913, 4131A062, 4854895

    BESTFIT TRUCK PARTS

    $182.99
    Perkins Water Pump By BESTfit Replaces 2772913, 4131A062, 4854895 Fits Caterpillar Perkins C4.4, C6.6 & C7.1Upgrade your engine cooling system with the BESTfit Perkins Water Pump, a direct...
    29-07120172
    SKU:
    29-07120172
    Product Type:
    Engine Parts
    Style Options:
    Caterpillar
    Make:
    Universal Items
    $182.99
    Qty in Cart: 0
    Price:
    $182.99
    Subtotal:
  • BESTfit CAT Water Pump For Caterpillar 3126B & C7 Engine Replaces 1939239, 3522139, 2364420

    BESTfit CAT Water Pump For Caterpillar 3126B & C7 Engine Replaces 1939239, 3522139, 2364420

    BESTFIT TRUCK PARTS

    $366.99
    Water Pump By BESTfit Replaces 1939239, 3522139, 2364420 Fits Caterpillar 3126B & C7 EngineUpgrade your engine cooling system with the BESTfit CAT Water Pump, a direct replacement for OEM part...
    29-07120175
    SKU:
    29-07120175
    Style Options:
    Caterpillar
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $366.99
    Qty in Cart: 0
    Price:
    $366.99
    Subtotal:
  • BESTfit Cummins Water Pump For Cummins L10 Engine Replaces 3255965, G3803402, WP2254

    BESTfit Cummins Water Pump For Cummins L10 Engine Replaces 3255965, G3803402, WP2254

    BESTFIT TRUCK PARTS

    $929.99
    Water Pump By BESTfit Replaces 3255965, G3803402, WP2254 Fits Cummins L10 EngineUpgrade your engine cooling system with the BESTfit Cummins Water Pump, a direct replacement for OEM part numbers...
    29-07120174
    SKU:
    29-07120174
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $929.99
    Qty in Cart: 0
    Price:
    $929.99
    Subtotal:
  • BESTfit Detroit Diesel Water Pump For Detroit 60 Series 12.7L Engine Replaces 2282335, 7141X, RW4124X

    BESTfit Detroit Diesel Water Pump For Detroit 60 Series 12.7L Engine Replaces 2282335, 7141X, RW4124X

    BESTFIT TRUCK PARTS

    $543.99
    Water Pump Engine W/ EGR By BESTfit Replaces 2282335, 7141X, RW4124X Fits Detroit 60 Series 12.7L EngineUpgrade your engine cooling system with the BESTfit Detroit Diesel Water Pump, a direct...
    29-07120161
    SKU:
    29-07120161
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $543.99
    Qty in Cart: 0
    Price:
    $543.99
    Subtotal:
  • BESTfit Cummins Water Pump For Cummins ISX/QSX 2002-2008 Replaces 4923759, 7084X, WP04936

    BESTfit Cummins Water Pump For Cummins ISX/QSX 2002-2008 Replaces 4923759, 7084X, WP04936

    BESTFIT TRUCK PARTS

    $391.99
    Cummins Water Pump By BESTfit Replaces 4923759, 7084X, WP04936 Fits Cummins ISX/QSX 2002-2008Enhance your engine cooling system with the BESTfit Cummins Water Pump, a direct replacement for OEM part...
    29-07120168
    SKU:
    29-07120168
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $391.99
    Qty in Cart: 0
    Price:
    $391.99
    Subtotal:
  • BESTfit CAT Water Pump For Caterpillar 3126 & 3116 Engine Replaces US4508, 3522150, 4346107

    BESTfit CAT Water Pump For Caterpillar 3126 & 3116 Engine Replaces US4508, 3522150, 4346107

    BESTFIT TRUCK PARTS

    $451.99
    CAT Water Pump By BESTfit Replaces US4508, 3522150, 4346107 Fits Caterpillar 3126 & 3116 EngineUpgrade your engine cooling system with the BESTfit CAT Water Pump, a direct replacement for OEM part...
    29-07120171
    SKU:
    29-07120171
    Style Options:
    Caterpillar
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $451.99
    Qty in Cart: 0
    Price:
    $451.99
    Subtotal:
  • BESTfit Remanufactured CAT Water Pump For Caterpillar C13 Engine Replaces 2285811, 3764216, US952

    BESTfit Remanufactured CAT Water Pump For Caterpillar C13 Engine Replaces 2285811, 3764216, US952

    BESTFIT TRUCK PARTS

    $569.99
    Remanufactured Water Pump By BESTfit Replaces 2285811, 3764216, US952 Fits Caterpillar C13Built for durability and cooling efficiency, the BESTfit Remanufactured CAT Water Pump replaces OEM...
    29-07120157
    SKU:
    29-07120157
    Style Options:
    Caterpillar
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $569.99
    Qty in Cart: 0
    Price:
    $569.99
    Subtotal:
  • BESTfit CAT Water Pump For Caterpillar 3126E Engine Replaces 0451056, 7016X, 3522109

    BESTfit CAT Water Pump For Caterpillar 3126E Engine Replaces 0451056, 7016X, 3522109

    BESTFIT TRUCK PARTS

    $358.99
    CAT Water Pump By BESTfit Replaces 0451056, 7016X, 3522109 Fits Caterpillar 3126E EngineEnhance your engine cooling system with the BESTfit CAT Water Pump, a direct replacement for OEM part numbers...
    29-07120170
    SKU:
    29-07120170
    Product Type:
    Engine Parts
    Style Options:
    Caterpillar
    Make:
    Universal Items
    $358.99
    Qty in Cart: 0
    Price:
    $358.99
    Subtotal:
  • BESTfit CAT Water Pump For Caterpillar 3126E, C7 & C9 Engine Replaces 2601546, 2274300, G3522080

    BESTfit CAT Water Pump For Caterpillar 3126E, C7 & C9 Engine Replaces 2601546, 2274300, G3522080

    BESTFIT TRUCK PARTS

    $323.99
    CAT Water Pump By BESTfit Replaces 2601546, 2274300, G3522080 Fits Caterpillar 3126E, C7 & C9 EngineEnhance your engine cooling system with the BESTfit CAT Water Pump, a direct replacement for OEM...
    29-07120167
    SKU:
    29-07120167
    Style Options:
    Caterpillar
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $323.99
    Qty in Cart: 0
    Price:
    $323.99
    Subtotal:
  • BESTfit Cummins Water Pump For Cummins ISX/QSX 2002-2008 Engine Replaces 4089910RX, 6089, WP2258

    BESTfit Cummins Water Pump For Cummins ISX/QSX 2002-2008 Engine Replaces 4089910RX, 6089, WP2258

    BESTFIT TRUCK PARTS

    $469.99
    Water Pump By BESTfit Replaces 4089910RX, 6089, WP2258 Fits Cummins ISX/QSX 2002-2008Upgrade your engine cooling system with the BESTfit Cummins Water Pump, a direct replacement for OEM part numbers...
    29-07120164
    SKU:
    29-07120164
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $469.99
    Qty in Cart: 0
    Price:
    $469.99
    Subtotal:
  • BESTfit Cummins Water Pump W/ 12 Groove Pulley For Cummins ISX/ISZ Engine Replaces 181956, 3687900, 5406044

    BESTfit Cummins Water Pump W/ 12 Groove Pulley For Cummins ISX/ISZ Engine Replaces 181956, 3687900, 5406044

    BESTFIT TRUCK PARTS

    $367.99
    Water Pump W/ 12 Groove Pulley By BESTfit Replaces 181956, 3687900, 5406044 Fits Cummins ISX/ISZ EngineUpgrade your engine cooling system with the BESTfit Cummins Water Pump with 12 Groove Pulley, a...
    29-07120153
    SKU:
    29-07120153
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $367.99
    Qty in Cart: 0
    Price:
    $367.99
    Subtotal:
  • BESTfit CAT Water Pump For Caterpillar C15 Non-Acert Engine Replaces 2282321, 4015, 6015

    BESTfit CAT Water Pump For Caterpillar C15 Non-Acert Engine Replaces 2282321, 4015, 6015

    BESTFIT TRUCK PARTS

    $568.99
    Water Pump Dome Gear Staright Cut Teeth By BESTfit Replaces 2282321, 4015, 6015 Fits Caterpillar C15 Non-Acert EngineUpgrade your engine cooling system with the BESTfit CAT Water Pump, a direct...
    29-07120163
    SKU:
    29-07120163
    Style Options:
    Caterpillar
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $568.99
    Qty in Cart: 0
    Price:
    $568.99
    Subtotal:
  • BESTfit Cummins Water Pump For Cummins ISX Engine Replaces AK2883151, US318, G2883151

    BESTfit Cummins Water Pump For Cummins ISX Engine Replaces AK2883151, US318, G2883151

    BESTFIT TRUCK PARTS

    $236.99
    Water Pump By BESTfit Replaces AK2883151, US318, G2883151 Fits Cummins ISX EngineUpgrade your engine cooling system with the BESTfit Cummins Water Pump, a direct replacement for OEM part numbers...
    29-07120160
    SKU:
    29-07120160
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $236.99
    Qty in Cart: 0
    Price:
    $236.99
    Subtotal:
  • BESTfit CAT Water Pump For Caterpillar 3126 & 3116 Engine Replaces 20R0586, 4P3681, 2282318

    BESTfit CAT Water Pump For Caterpillar 3126 & 3116 Engine Replaces 20R0586, 4P3681, 2282318

    BESTFIT TRUCK PARTS

    $309.99
    Water Pump By BESTfit Replaces 20R0586, 4P3681, 2282318 Fits Caterpillar 3126 & 3116 EngineUpgrade your engine cooling system with the BESTfit CAT Water Pump, a direct replacement for OEM part...
    29-07120162
    SKU:
    29-07120162
    Product Type:
    Engine Parts
    Style Options:
    Caterpillar
    Make:
    Universal Items
    $309.99
    Qty in Cart: 0
    Price:
    $309.99
    Subtotal:
  • BESTfit Detroit Diesel Water Pump For Detroit S50/S60 Engine Replaces 23539601, 99183, WP5026

    BESTfit Detroit Diesel Water Pump For Detroit S50/S60 Engine Replaces 23539601, 99183, WP5026

    BESTFIT TRUCK PARTS

    $444.99
    Water Pump By BESTfit Replaces 23539601, 99183, WP5026 Fits Detroit S50/S60 EngineUpgrade your engine cooling system with the BESTfit Detroit Diesel Water Pump, a direct replacement for OEM part...
    29-07120149
    SKU:
    29-07120149
    Style Options:
    Detroit
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $444.99
    Qty in Cart: 0
    Price:
    $444.99
    Subtotal:
  • BESTfit Cummins Water Pump W/ Short Shaft For Cummins L10 Replaces 4972843, 4965417, 4972850

    BESTfit Cummins Water Pump W/ Short Shaft For Cummins L10 Replaces 4972843, 4965417, 4972850

    BESTFIT TRUCK PARTS

    $409.99
    Water Pump By BESTfit Replaces 4972843, 4965417, 4972850 Fits Cummins L10Upgrade your engine cooling system with the BESTfit Cummins Water Pump Short Shaft, a direct replacement for OEM part numbers...
    29-07120159
    SKU:
    29-07120159
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $409.99
    Qty in Cart: 0
    Price:
    $409.99
    Subtotal:
  • BESTfit Cummins Water Pump W/ Long Shaft For Cummins L10/M11 Engine Replaces 3068848, 3803260, 4965439

    BESTfit Cummins Water Pump W/ Long Shaft For Cummins L10/M11 Engine Replaces 3068848, 3803260, 4965439

    BESTFIT TRUCK PARTS

    $296.99
    Water Pump W/ Long Shaft By BESTfit Replaces 3068848, 3803260, 4965439 Fits Cummins L10/M11 EngineUpgrade your engine cooling system with the BESTfit Cummins Water Pump Long Shaft, a direct...
    29-07120156
    SKU:
    29-07120156
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $296.99
    Qty in Cart: 0
    Price:
    $296.99
    Subtotal:
  • BESTfit Cummins Water Pump For Cummins N14 Engine Replaces 3076529, AW2090, WP5015

    BESTfit Cummins Water Pump For Cummins N14 Engine Replaces 3076529, AW2090, WP5015

    BESTFIT TRUCK PARTS

    $253.99
    Water Pump By BESTfit Replaces 3076529, AW2090, WP5015 Fits Cummins N14 EngineUpgrade your engine cooling system with the BESTfit Cummins Water Pump, a direct replacement for OEM part numbers...
    29-07120158
    SKU:
    29-07120158
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $253.99
    Qty in Cart: 0
    Price:
    $253.99
    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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