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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 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
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  • 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
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  • 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
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  • 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
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  • 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
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  • 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:
  • BESTfit 24 Inch 304 Stainless Steel Grab Handle

    BESTfit 24 Inch 304 Stainless Steel Grab Handle

    BESTFIT TRUCK PARTS

    $119.99
    24 Inch Stainless Steel Grab Handle By BESTfit1The BESTfit 24 Inch 304 Stainless Steel Grab Handle is a durable, corrosion-resistant solution for safe and convenient truck access. Made from...
    GR-GH-24S
    SKU:
    GR-GH-24S
    Length Options:
    24 Inch
    Product Type:
    Exhaust
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    $119.99
    Qty in Cart: 0
    Price:
    $119.99
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  • BESTfit 3.5 ID X 3.71 OD X 6 Inch CAC Hose

    BESTfit 3.5 ID X 3.71 OD X 6 Inch CAC Hose

    BESTFIT TRUCK PARTS

    $58.99
    3.5 ID X 3.71 OD X 6 Inch Cold CAC Hose By BESTfitAchieve reliable airflow and superior engine protection with the BESTfit 3.5 ID x 3.71 OD x 6 Inch CAC Hose. Engineered for EGR cold side systems,...
    GR-CCAC-20078
    SKU:
    GR-CCAC-20078
    Product Type:
    Engine Parts
    Material Options:
    Silicone
    Length Options:
    6 Inch
    Make:
    Universal Items
    $58.99
    Qty in Cart: 0
    Price:
    $58.99
    Subtotal:
  • CSM Brushed Stainless Steel Trash Can

    CSM Brushed Stainless Steel Trash Can

    CHROME SHOP MAFIA

    $99.00
    Stainless Steel Trash Can By Chrome Shop MafiaOrganize your cab, garage, or workspace with the CSM Brushed Stainless Steel Trash Can by Chrome Shop Mafia. Made of 16-gauge brushed stainless steel...
    09-2200045
    SKU:
    09-2200045
    Location:
    Made In USA
    Product Type:
    Apparel
    Make:
    Universal Items
    $99.00
    Qty in Cart: 0
    Price:
    $99.00
    Subtotal:
  • 8 Inch Black Battery Jumper Cable Replaces 84-9401

    8 Inch Black Battery Jumper Cable Replaces 84-9401

    AFTERMARKET

    $22.71
    8 Inch 1 Gauge Black Battery Jumper CableQuickly and safely jump-start or connect batteries with the 8 Inch Black Battery Jumper Cable. This premium battery-to-battery cable includes a 1-gauge wire...
    09-160300035
    SKU:
    09-160300035
    Color:
    Black
    Product Type:
    Engine Parts
    Length Options:
    8 Inch
    Make:
    Universal Items
    $22.71
    Qty in Cart: 0
    Price:
    $22.71
    Subtotal:
  • 17 Inch Red Battery Jumper Cable Replaces 84-9307, 9-217

    17 Inch Red Battery Jumper Cable Replaces 84-9307, 9-217

    AFTERMARKET

    $29.67
    17 Inch 2 Gauge Red Battery Jumper Cable W/ 3/8 Inch Anti- Rotational LugsOptimize battery performance with the 17 Inch Red Battery Jumper Cable. Made for Group 31 batteries, it includes a 2/0 gauge...
    09-160300046
    SKU:
    09-160300046
    Length Options:
    17 Inch
    Color:
    Red
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $29.67
    Qty in Cart: 0
    Price:
    $29.67
    Subtotal:
  • 17 Inch Black Battery Jumper Cable Replaces 84-9306, 9-218

    17 Inch Black Battery Jumper Cable Replaces 84-9306, 9-218

    AFTERMARKET

    $29.67
    17 Inch 2 Gauge Black Battery Jumper Cable W/ 3/8 Inch Anti- Rotational LugsKeep your batteries connected and your truck powered with the 17 Inch Black Battery Jumper Cable. Designed for Group 31...
    09-160300048
    SKU:
    09-160300048
    Product Type:
    Engine Parts
    Color:
    Black
    Length Options:
    17 Inch
    Make:
    Universal Items
    $29.67
    Qty in Cart: 0
    Price:
    $29.67
    Subtotal:
  • BESTfit 7-5 Inch I.D. Exhaust Reducer

    BESTfit 7-5 Inch I.D. Exhaust Reducer

    BESTFIT TRUCK PARTS

    $62.99
    7-5 Inch Aluminized Exhaust Reducer By BESTfitMaintain reliable exhaust performance with the BESTfit 7-5 Inch I.D. Exhaust Reducer. Made from durable aluminized steel, it offers an 8-inch height and...
    09-080100601
    SKU:
    09-080100601
    Material Options:
    Aluminum
    Diameter Options:
    7 To 5 Inch
    Product Type:
    Exhaust
    Make:
    Universal Items
    $62.99
    Qty in Cart: 0
    Price:
    $62.99
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  • Black Aluminum Flat Top Brake Knob W/ CSM Logo Engraved

    Black Aluminum Flat Top Brake Knob W/ CSM Logo Engraved

    TWISTED SHIFTERZ

    $84.99
    CSM Logo Black Aluminum Flat Top Brake KnobCustomize your truck cab with the Black Aluminum Flat Top Brake Knob featuring the engraved CSM logo. This high-quality aluminum knob is built for strength,...
    09-15130960
    SKU:
    09-15130960
    Product Type:
    Interior
    Make:
    Universal Items
    $84.99
    Qty in Cart: 0
    Price:
    $84.99
    Subtotal:
  • BESTfit 6-5 ID X 96 Inch Chrome Curve Top Stack

    BESTfit 6-5 ID X 96 Inch Chrome Curve Top Stack

    BESTFIT TRUCK PARTS

    $695.00
    6-5 ID X 96 Inch Curve Top Stack By BESTfitAchieve smooth and efficient exhaust flow with the BESTfit 6-5 ID x 96 Inch Chrome Curve Top Stack. Made from chrome-plated steel for heavy-duty durability,...
    09-086596172
    SKU:
    09-086596172
    Product Type:
    Exhaust
    Finish Options:
    Chrome-Plated
    Material Options:
    Steel
    Diameter Options:
    6 To 5 Inch
    Height Options:
    96 Inch
    Position:
    Lower
    Style Options:
    Curve Turn
    Make:
    Universal Items
    $695.00
    Qty in Cart: 0
    Price:
    $695.00
    Subtotal:
  • FREE SHIPPING
    18 X 13 X 23 Inch Aluminum In- Frame Battery Box W/ Latch

    18 X 13 X 23 Inch Aluminum In- Frame Battery Box W/ Latch

    AFTERMARKET

    $524.99
    Aluminum In- Frame Battery Box W/ Diamond Plate Lid & Latch- 18 X 13 X 23 InchEnsure reliable battery storage and protection with the 18 x 13 x 23 Inch Aluminum In-Frame Battery Box with Latch...
    09-0501002
    SKU:
    09-0501002
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $524.99
    Qty in Cart: 0
    Price:
    $524.99
    Subtotal:
  • CSM Tank Chair Or Couch Cushion

    CSM Tank Chair Or Couch Cushion

    CHROME SHOP MAFIA

    $142.99
    Choose Option(s) to see description.CSM Tank Chair Or Couch Bottom CushionBottom Cushion For CSM Tank Chair Or CouchAdd comfort and style back to your seating setup with this CSM Tank Chair or Couch...
    PPR_300371
    SKU:
    PPR_300371
    Product Type:
    Apparel
    Make:
    Universal Items
    Color:
    Black
    Location:
    Made In USA
    $142.99
    Qty in Cart: 0
    Price:
    $142.99
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  • Powder Coated Steel Power Drill Organizer Bracket

    Powder Coated Steel Power Drill Organizer Bracket

    JONES MFG

    $25.90 - $46.90
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of TrucksPowder Coated Steel 2 Bay Power Drill Organizer Bracket2 Bay Power Drill Organizer BracketMaximize...
    PPR_300370
    SKU:
    PPR_300370
    Length Options:
    14 Inch
    Product Type:
    Cargo Control
    Finish Options:
    Black Powder Coat
    Length Options:
    6 1/2 Inch
    Width Options:
    5 Inch
    Height Options:
    1 1/2 Inch
    Material Options:
    Steel
    Make:
    Universal Items
    $25.90 - $46.90
    Qty in Cart: 0
    Price:
    $25.90 - $46.90
    Subtotal:
  • Stop, Turn, Tail Box LED Light

    Stop, Turn, Tail Box LED Light

    AUTOMANN USA

    $81.99 - $83.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of TrucksStop, Turn, Tail Box LED Light- Driver Side Replaces 53640Driver Side Stop, Turn, Tail Box LED Light- 3...
    PPR_300366
    SKU:
    PPR_300366
    Color:
    Red/White
    Position:
    Driver Side
    Height Options:
    3 Inch
    Width Options:
    5 3/4 Inch
    Length Options:
    6 3/4 Inch
    Position:
    Passenger Side
    Product Type:
    Lighting
    Material Options:
    Plastic/Poly
    Style Options:
    Black Housing
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $81.99 - $83.99
    Qty in Cart: 0
    Price:
    $81.99 - $83.99
    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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