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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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  • Quantity
  • Price
  • Subtotal
  • BESTfit Eight Bolt Power Take-Off For Mechanical Transmissions Replaces 680XRAHXA3XD

    BESTfit Eight Bolt Power Take-Off For Mechanical Transmissions Replaces 680XRAHXA3XD

    BESTFIT TRUCK PARTS

    $2,165.99
    Eight Bolt Power Take-Off By BESTfit Replaces 680XRAHXA3XD Fits Mechanical TransmissionsDesigned for extreme duty performance, the BESTfit Eight Bolt Power Take-Off is a premium replacement for...
    29-07050040
    SKU:
    29-07050040
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $2,165.99
    Qty in Cart: 0
    Price:
    $2,165.99
    Subtotal:
  • BESTfit Stud Kit Replaces 717078X

    BESTfit Stud Kit Replaces 717078X

    BESTFIT TRUCK PARTS

    $80.99
    Stud Kit By BESTfitMade for strength and reliability, the BESTfit Stud Kit is a premium replacement for 717078X designed specifically for Chelsea PTO systems. Built for heavy-duty applications, this...
    29-07050054
    SKU:
    29-07050054
    Product Type:
    Engine Parts
    Position:
    Kit Full
    Make:
    Universal Items
    $80.99
    Qty in Cart: 0
    Price:
    $80.99
    Subtotal:
  • BESTfit Power Take-Off For Mechanical Transmissions Replaces 489XFAHXA3RA, SC534, 489XFAHXA3XQ

    BESTfit Power Take-Off For Mechanical Transmissions Replaces 489XFAHXA3RA, SC534, 489XFAHXA3XQ

    BESTFIT TRUCK PARTS

    $1,527.99
    Power Take-Off By BESTfit Replaces 489XFAHXA3RA, SC534, 489XFAHXA3XQ Fits Mechanical TransmissionsEngineered for strength and reliability, the BESTfit Power Take-Off is a premium replacement for...
    29-07050045
    SKU:
    29-07050045
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $1,527.99
    Qty in Cart: 0
    Price:
    $1,527.99
    Subtotal:
  • BESTfit Power Take-Off For Mechanical Transmissions Replaces 489XFAHXV5RK, 489XFAHXV5RA, 489XFAHXV5XQ

    BESTfit Power Take-Off For Mechanical Transmissions Replaces 489XFAHXV5RK, 489XFAHXV5RA, 489XFAHXV5XQ

    BESTFIT TRUCK PARTS

    $1,401.99
    Power Take-Off By BESTfit Replaces 489XFAHXV5RK, 489XFAHXV5RA, 489XFAHXV5XQ Fits Mechanical TransmissionsBuilt for strength and reliability, the BESTfit Power Take-Off is a high-quality replacement...
    29-07050036
    SKU:
    29-07050036
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $1,401.99
    Qty in Cart: 0
    Price:
    $1,401.99
    Subtotal:
  • BESTfit Eight Bolt Power Take-Off For Mechanical Transmissions Replaces 680XSAHXV3XD

    BESTfit Eight Bolt Power Take-Off For Mechanical Transmissions Replaces 680XSAHXV3XD

    BESTFIT TRUCK PARTS

    $2,040.99
    Eight Bolt Power Take-Off BESTfit Replaces 680XSAHXV3XD Fits Mechanical TransmissionsMade for strength and reliability, the BESTfit Eight Bolt Power Take-Off is a premium replacement for...
    29-07050043
    SKU:
    29-07050043
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $2,040.99
    Qty in Cart: 0
    Price:
    $2,040.99
    Subtotal:
  • BESTfit Eight Bolt Power Take-Off For Mechanical Transmissions Replaces MH8SC01XA1SE, 489XHAHXA3XD, TG8SU6807A1BX

    BESTfit Eight Bolt Power Take-Off For Mechanical Transmissions Replaces MH8SC01XA1SE, 489XHAHXA3XD, TG8SU6807A1BX

    BESTFIT TRUCK PARTS

    $1,355.99
    Eight Bolt Power Take-Off By BESTfit Replaces MH8SC01XA1SE, 489XHAHXA3XD, TG8SU6807A1BX Fits Mechanical TransmissionsMade for strength and reliability, the BESTfit Eight Bolt Power Take-Off is a...
    29-07050050
    SKU:
    29-07050050
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $1,355.99
    Qty in Cart: 0
    Price:
    $1,355.99
    Subtotal:
  • BESTfit Power Take-Off For Mechanical Transmissions Replaces 489XRAHXA3RA, 489XRAHXA3XQ, 489XRAHXA3RK

    BESTfit Power Take-Off For Mechanical Transmissions Replaces 489XRAHXA3RA, 489XRAHXA3XQ, 489XRAHXA3RK

    BESTFIT TRUCK PARTS

    $1,527.99
    Power Take-Off By BESTfit Replaces 489XRAHXA3RA, 489XRAHXA3XQ, 489XRAHXA3RK Fits Mechanical TransmissionsMade for strength and reliability, the BESTfit Power Take-Off is a premium replacement for...
    29-07050041
    SKU:
    29-07050041
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $1,527.99
    Qty in Cart: 0
    Price:
    $1,527.99
    Subtotal:
  • BESTfit Ten Bolt PowerShift PTO For Mechanical Transmissions Replaces 180274NYT, 890HAFJWB5AF

    BESTfit Ten Bolt PowerShift PTO For Mechanical Transmissions Replaces 180274NYT, 890HAFJWB5AF

    BESTFIT TRUCK PARTS

    $6,161.99
    Ten Bolt PowerShift Power Take-Off By BESTfit Replaces 180274NYT, 890HAFJWB5AF Fits Mechanical TransmissionsBuilt for strength and reliability, the BESTfit Ten Bolt PowerShift PTO is a premium...
    29-07050032
    SKU:
    29-07050032
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $6,161.99
    Qty in Cart: 0
    Price:
    $6,161.99
    Subtotal:
  • BESTfit Six Bolt PowerShift Power Take-Off For Mechanical Transmissions Replaces 180274J, 270GBHVPB3XK, 272GBHVPB3RK

    BESTfit Six Bolt PowerShift Power Take-Off For Mechanical Transmissions Replaces 180274J, 270GBHVPB3XK, 272GBHVPB3RK

    BESTFIT TRUCK PARTS

    $3,311.99
    Six Bolt PowerShift Power Take-Off By BESTfit Replaces 180274J, 270GBHVPB3XK, 272GBHVPB3RK Fits Mechanical TransmissionsDesigned for strength and dependable operation, the BESTfit Six Bolt PowerShift...
    29-07050039
    SKU:
    29-07050039
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $3,311.99
    Qty in Cart: 0
    Price:
    $3,311.99
    Subtotal:
  • BESTfit Six Bolt Power Take-Off For Mechanical Transmissions Replaces 442XRAHXA3XD, 442XRAHXA3XD

    BESTfit Six Bolt Power Take-Off For Mechanical Transmissions Replaces 442XRAHXA3XD, 442XRAHXA3XD

    BESTFIT TRUCK PARTS

    $1,321.99
    Six Bolt Power Take-Off By BESTfit Replaces 442XRAHXA3XD, 442XRAHXA3XD Fits Mechanical TransmissionsMade for strength and reliability, the BESTfit Six Bolt Power Take-Off is a premium replacement for...
    29-07050046
    SKU:
    29-07050046
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $1,321.99
    Qty in Cart: 0
    Price:
    $1,321.99
    Subtotal:
  • BESTfit Geared Adapter Power Take-Off Replaces 645GAHX3XX

    BESTfit Geared Adapter Power Take-Off Replaces 645GAHX3XX

    BESTFIT TRUCK PARTS

    $836.99
    Geared Adapter Power Take-Off By BESTfit Replaces 645GAHX3XXBuilt for strength and dependable performance, the BESTfit Geared Adapter Power Take-Off is a premium replacement for 645GAHX3XX designed...
    29-07050037
    SKU:
    29-07050037
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $836.99
    Qty in Cart: 0
    Price:
    $836.99
    Subtotal:
  • BESTfit Stud Kit Replaces 707072XB, 717072X, 17072XB

    BESTfit Stud Kit Replaces 707072XB, 717072X, 17072XB

    BESTFIT TRUCK PARTS

    $32.99
    Stud Kit By BESTfit Replaces 707072XB, 717072X, 17072XBEnsure a strong and reliable PTO installation with the BESTfit Stud Kit, a premium replacement for 707072XB, 717072X, and 17072XB designed...
    29-07050042
    SKU:
    29-07050042
    Position:
    Kit Full
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $32.99
    Qty in Cart: 0
    Price:
    $32.99
    Subtotal:
  • BESTfit Stud Kit Replaces 328170217X, 328170217XB

    BESTfit Stud Kit Replaces 328170217X, 328170217XB

    BESTFIT TRUCK PARTS

    $272.99
    Stud Kit By BESTfit Replaces 328170217X, 328170217XBEnsure a strong and reliable PTO installation with the BESTfit Stud Kit, a premium replacement for 328170217X and 328170217XB designed specifically...
    29-07050035
    SKU:
    29-07050035
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $272.99
    Qty in Cart: 0
    Price:
    $272.99
    Subtotal:
  • BESTfit Stud Kit Replaces 32817076X, 32817076XB, 71702X

    BESTfit Stud Kit Replaces 32817076X, 32817076XB, 71702X

    BESTFIT TRUCK PARTS

    $22.99
    Stud Kit By BESTfit Replaces 32817076X, 32817076XB, 71702XEnsure a strong and reliable PTO installation with the BESTfit Stud Kit, a premium replacement for 32817076X, 32817076XB, and 71702X designed...
    29-07050033
    SKU:
    29-07050033
    Position:
    Kit Full
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $22.99
    Qty in Cart: 0
    Price:
    $22.99
    Subtotal:
  • BESTfit Power Take-Off For Mechanical Transmissions Replaces 489XRAHXV3RA, 489XRAHXV3XQ, 489XRAHXV3RK

    BESTfit Power Take-Off For Mechanical Transmissions Replaces 489XRAHXV3RA, 489XRAHXV3XQ, 489XRAHXV3RK

    BESTFIT TRUCK PARTS

    $1,401.99
    Power Take-Off By BESTfit Replaces 489XRAHXV3RA, 489XRAHXV3XQ, 489XRAHXV3RK Fits Mechanical TransmissionBuilt for strength and reliability, the BESTfit Power Take-Off is a premium replacement for...
    29-07050038
    SKU:
    29-07050038
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $1,401.99
    Qty in Cart: 0
    Price:
    $1,401.99
    Subtotal:
  • BESTfit Power Take-Off For Mechanical Transmissions Replaces 489XLAHXV3RK, 489XLAHXV3RA, 489XLAHXV3RB

    BESTfit Power Take-Off For Mechanical Transmissions Replaces 489XLAHXV3RK, 489XLAHXV3RA, 489XLAHXV3RB

    BESTFIT TRUCK PARTS

    $1,401.99
    Power Take-Off By BESTfit Replaces 489XLAHXV3RK, 489XLAHXV3RA, 489XLAHXV3RB Fits Mechanical TransmissionsBuilt for strength and dependable performance, the BESTfit Power Take-Off is a high-quality...
    29-07050031
    SKU:
    29-07050031
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $1,401.99
    Qty in Cart: 0
    Price:
    $1,401.99
    Subtotal:
  • BESTfit Cummins DEF Doser Injector Replaces 5506855, A050S599, 4377650 For Cummins

    BESTfit Cummins DEF Doser Injector Replaces 5506855, A050S599, 4377650 For Cummins

    BESTFIT TRUCK PARTS

    $715.99
    Diesel Exhaust Fluid Doser Injector By BESTfit Replaces 5506855, A050S599, 4377650 Fits CumminsMaintain peak emissions system performance with the BESTfit Cummins DEF Doser Injector, a reliable...
    29-06070040
    SKU:
    29-06070040
    Product Type:
    Fuel Tanks
    Style Options:
    Cummins
    Make:
    Universal Items
    $715.99
    Qty in Cart: 0
    Price:
    $715.99
    Subtotal:
  • BESTfit Power Take-Off For Mechanical Transmissions Replaces 489XFAHXV3RA, 489XFAHXV3RB, 489XFAHXV3XK

    BESTfit Power Take-Off For Mechanical Transmissions Replaces 489XFAHXV3RA, 489XFAHXV3RB, 489XFAHXV3XK

    BESTFIT TRUCK PARTS

    $1,401.99
    Power Take- Off By BESTfit Replaces 489XFAHXV3RA, 489XFAHXV3RB, 489XFAHXV3XK Fits Mechanical TransmissionsBuilt for strength and reliability, the BESTfit Power Take-Off is a high-quality replacement...
    29-07050034
    SKU:
    29-07050034
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $1,401.99
    Qty in Cart: 0
    Price:
    $1,401.99
    Subtotal:
  • BESTfit Stud Kit Replaces 717086X

    BESTfit Stud Kit Replaces 717086X

    BESTFIT TRUCK PARTS

    $80.99
    Stud Kit By BESTfitEnsure a strong and reliable PTO installation with the BESTfit Stud Kit, a premium replacement for 717086X designed specifically for Chelsea 280 Series PTO applications. This...
    29-07050030
    SKU:
    29-07050030
    Position:
    Kit Full
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $80.99
    Qty in Cart: 0
    Price:
    $80.99
    Subtotal:
  • BESTfit DEF Sensor Head Assembly For Freightliner, Kenworth & Western Star W/ Detroit Diesel DD15 Engine Replaces 0436002000, 0437613000

    BESTfit DEF Sensor Head Assembly For Freightliner, Kenworth & Western Star W/ Detroit Diesel DD15 Engine Replaces 0436002000, 0437613000

    BESTFIT TRUCK PARTS

    $1,501.99
    Diesel Exhaust Fluid Sensor Head Assembly By BESTfit Replaces 0436002000, 0437613000 Fits Freightliner, Kenworth & Western Star W/ Detroit DieselKeep your emissions system operating at peak...
    29-06070032
    SKU:
    29-06070032
    Product Type:
    Fuel Tanks
    Make:
    Kenworth
    Make:
    Western Star
    Make:
    Freightliner
    $1,501.99
    Qty in Cart: 0
    Price:
    $1,501.99
    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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