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Kenworth T660 Parts

The Kenworth T660 semi truck model is a good example of Kenworth's commitment to providing great trucks and great value and we can make you stand out even more by customizing your semi truck with quality aftermarket and custom parts and chrome accessories from 4 State Trucks. Whether you want to update your KW exhaust, fenders, or fuel tank, 4 State Trucks has the right aftermarket parts for the job. Hit the highway in safety and style in your Kenworth heavy duty truck or 18 wheeler.
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  • 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:
  • BESTfit Cummins Water Pump For Dodge Ram 2500/3500 Replaces 182060HD, 4934703, 5473239

    BESTfit Cummins Water Pump For Dodge Ram 2500/3500 Replaces 182060HD, 4934703, 5473239

    BESTFIT TRUCK PARTS

    $178.99
    Water Pump By BESTfit Replaces 182060HD, 4934703, 5473239 Fits Dodge Ram 2500/3500Enhance your engine cooling system with the BESTfit Cummins Water Pump, a direct replacement for OEM part numbers...
    29-07120145
    SKU:
    29-07120145
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $178.99
    Qty in Cart: 0
    Price:
    $178.99
    Subtotal:
  • BESTfit Cummins Water Pump For Cummins ISB/QSB Engine Replaces 182168, 5473174,5477736

    BESTfit Cummins Water Pump For Cummins ISB/QSB Engine Replaces 182168, 5473174,5477736

    BESTFIT TRUCK PARTS

    $246.99
    Water Pump By BESTfit Replaces 182168, 5473174,5477736 Fits Cummins ISB/QSB EngineUpgrade your engine cooling system with the BESTfit Cummins Water Pump, a direct replacement for OEM part numbers...
    29-07120155
    SKU:
    29-07120155
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $246.99
    Qty in Cart: 0
    Price:
    $246.99
    Subtotal:
  • BESTfit Cummins Water Pump Short Shaft For Cummins L10/M11 Engine Replaces 4087, 4955706,RW4077

    BESTfit Cummins Water Pump Short Shaft For Cummins L10/M11 Engine Replaces 4087, 4955706,RW4077

    BESTFIT TRUCK PARTS

    $296.99
    Water Pump Short Shaft By BESTfit Replaces 4087, 4955706,RW4077 Fits Cummins L10/M11 EngineUpgrade your engine cooling system with the BESTfit Cummins Water Pump Short Shaft, a direct replacement for...
    29-07120152
    SKU:
    29-07120152
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $296.99
    Qty in Cart: 0
    Price:
    $296.99
    Subtotal:
  • BESTfit Cummins Water Pump W/ 88mm Pulley For Cummins 8.3L & 8.9L Engine Replaces 4089952, 5579022, 6410397

    BESTfit Cummins Water Pump W/ 88mm Pulley For Cummins 8.3L & 8.9L Engine Replaces 4089952, 5579022, 6410397

    BESTFIT TRUCK PARTS

    $166.99
    Water Pump W/ 88mm Pulley By BESTfit Replaces 4089952, 5579022, 6410397 Fits Cummins 8.3L & 8.9L EngineEnhance your cooling system with the BESTfit Cummins Water Pump with 88mm pulley, a direct...
    29-07120141
    SKU:
    29-07120141
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $166.99
    Qty in Cart: 0
    Price:
    $166.99
    Subtotal:
  • BESTfit Cummins Water Pump For Dodge Ram 2500 Replaces 3285414, 4089731, 71100619

    BESTfit Cummins Water Pump For Dodge Ram 2500 Replaces 3285414, 4089731, 71100619

    BESTFIT TRUCK PARTS

    $99.99
    Water Pump By BESTfit Replaces 3285414, 4089731, 71100619 Fits Dodge Ram 2500Enhance your engine cooling system with the BESTfit Cummins Water Pump, a direct replacement for OEM part numbers 3285414,...
    29-07120151
    SKU:
    29-07120151
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $99.99
    Qty in Cart: 0
    Price:
    $99.99
    Subtotal:
  • BESTfit Cummins Water Pump For Cummins ISX/QSX Engine Replaces 3691299, 3692580, 4393548

    BESTfit Cummins Water Pump For Cummins ISX/QSX Engine Replaces 3691299, 3692580, 4393548

    BESTFIT TRUCK PARTS

    $479.99
    Water Pump By BESTfit Replaces 3691299, 3692580, 4393548 Fits Cummins ISX/QSX EngineUpgrade your engine cooling system with the BESTfit Cummins Water Pump, a direct replacement for OEM part numbers...
    29-07120154
    SKU:
    29-07120154
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $479.99
    Qty in Cart: 0
    Price:
    $479.99
    Subtotal:
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Adding your products to cart

Keeping your Kenworth T660 in top shape? This parts lineup has everything you need whether you're doing regular maintenance, repairs, or adding some personal style. The T660 is known for its power, efficiency, and driver comfort, and this collection of parts helps you keep it all running smooth. you'll find engine and drivetrain components, performance parts, and all the essentials to stay road-ready. Want to upgrade your rig's appearance? Check out the bumpers, grilles, lights, and mud flaps made to fit the T660 just right. Inside the cab, you'll find comfort-focused upgrades like new seats, storage solutions, and electrical components that make long hauls a little easier. From filters and hoses to full chrome trim kits, this lineup covers every corner of your truck front to back, inside and out. Whether you're swapping out worn parts or customizing your ride, this is your one-stop shop for Kenworth T660 parts and accessories. Built for durability. Designed for comfort. Backed by quality. Ready when you are.

Frequently Asked Questions About Kenworth T660 Parts

What years are Kenworth T660 parts compatible with, and are they interchangeable between model years?

Kenworth T660 parts are designed for trucks manufactured from 2008 to 2016. While many parts are interchangeable across these years, some components underwent updates. For example, bumpers from 2008-2012 models may have different mounting points than 2013-2016 versions. Always verify your specific OEM and model year before ordering to ensure proper fitment, especially for body panels, electrical components, and emission-related parts.

Are aftermarket bumpers as durable as OEM Kenworth bumpers, and what materials should I look for?

Quality aftermarket bumpers can match or exceed OEM durability when made from the right materials. Look for bumpers constructed from 16-gauge steel or thicker, with proper chrome plating or powder coating. Stainless steel options offer superior corrosion resistance. Avoid bumpers made from thin gauge steel (18-20 gauge) as they tend to bend easily and show wear quickly. Chrome should be triple-plated for longevity, and welds should be continuous rather than spot-welded.

What tools and skills are needed to install T660 bumpers and body parts myself?

Basic bumper installation requires a socket set (typically 3/4" and 7/8"), torque wrench, and potentially a helper due to weight. Most bumpers weigh 80-150 pounds. You'll need to disconnect fog lights and any sensors. Installation typically takes 2-4 hours. For hood and fender replacements, add panel alignment tools and expect 4-6 hours. If your truck has collision avoidance sensors or adaptive cruise control, professional calibration may be required after installation.

What's the difference between chrome, stainless steel, and painted finish options for T660 parts?

Chrome bumpers offer the classic shiny appearance but require regular polishing and can pit in harsh climates. Stainless steel provides excellent corrosion resistance with less maintenance but costs 20-30% more. Painted finishes are the most economical and can be color-matched to your truck, but may chip and require touch-ups. For winter operations or coastal areas, stainless steel offers the best long-term value despite higher initial cost.

How do I identify the correct replacement parts for my specific T660 configuration?

Start with your OEM number to determine exact model year and factory specifications. Key variations include standard vs. extended hood, day cab vs. sleeper configuration, and whether you have the aerodynamic package. Bumper widths vary from 18" to 20" depending on these factors. Check for additional features like fog light cutouts, tow hook provisions, and sensor mounting points. When ordering electrical components like headlights, verify if you have the multiplexed electrical system (common in 2013+ models).


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