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Kenworth T300-T450 Parts

Shop heavy-duty mechanical replacement parts designed to fit the Kenworth T300 (1995 - 2007) and Kenworth T450 (1989 - 1997). Order precision-fit, quick-to-ship aftermarket truck parts to minimize downtime. Customize the look of your medium-duty vocational truck with our selection of exterior and interior chrome accessories, or outfit the frame rail with toolboxes, fuel tanks, and more.
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  • Hogebuilt Rogue Series 80 Inch Stainless Steel Half Fenders

    Hogebuilt Rogue Series 80 Inch Stainless Steel Half Fenders

    HOGEBUILT FENDERS

    $1,127.99 - $1,747.99
    The Hogebuilt Rogue Series 80 Inch Stainless Steel Half Fenders combine rugged strength with custom styling. Available in 304 and 430 stainless steel, these Ultimate Low Rider fenders resist rust,...
    PPR_300296
    SKU:
    PPR_300296
    Length Options:
    80 Inch
    Material Options:
    Stainless Steel
    Product Type:
    Rear Fenders
    Size Options:
    14 Gauge
    Make:
    Universal Items
    Style Options:
    Low Rider Style
    Height Options:
    30 Inch
    Ready To Ship:
    Yes
    $1,127.99 - $1,747.99
    Qty in Cart: 0
    Price:
    $1,127.99 - $1,747.99
    Subtotal:
  • Exhaust Manifold Replaces 3906741, 3932180 For Cummins 6CT/8.3L Engine

    Exhaust Manifold Replaces 3906741, 3932180 For Cummins 6CT/8.3L Engine

    AKMI

    $290.99
    Cummins 6CT/8.3L Exhaust ManifoldMaximize engine efficiency with this dependable Exhaust Manifold engineered for Cummins 6CT and 8.3L engines, replacing 3906741 and 3932180. Designed to withstand...
    29-071200045
    SKU:
    29-071200045
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $290.99
    Qty in Cart: 0
    Price:
    $290.99
    Subtotal:
  • Exhaust Manifold Replaces 3084656, 4003994 For Cummins M11/ISM

    Exhaust Manifold Replaces 3084656, 4003994 For Cummins M11/ISM

    AKMI

    $561.99
    Cummins M11/ISM Exhaust ManifoldKeep your rig operating smoothly with this durable Exhaust Manifold designed for Cummins M11 and ISM engines, replacing 3084656 and 4003994. Built for high-heat...
    29-071200047
    SKU:
    29-071200047
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $561.99
    Qty in Cart: 0
    Price:
    $561.99
    Subtotal:
  • Flywheel Replaces 4710303505, 4710306705, 4710306205 For Detroit DD13/DD15 2016-2019

    Flywheel Replaces 4710303505, 4710306705, 4710306205 For Detroit DD13/DD15 2016-2019

    AKMI

    $1,230.99
    150 Teeth Flywheel Fits Models W/ Detroit DD13/DD15 Engine & 17 Inch ClutchKeep your Detroit DD13/DD15 engine performing at its best with this high-quality Flywheel. Compatible with DT12...
    29-070400119
    SKU:
    29-070400119
    Product Type:
    Engine Parts
    Style Options:
    Detroit
    Make:
    Universal Items
    $1,230.99
    Qty in Cart: 0
    Price:
    $1,230.99
    Subtotal:
  • Flywheel Replaces 3693467, 3693468, 3693466 For Cummins X15

    Flywheel Replaces 3693467, 3693468, 3693466 For Cummins X15

    AKMI

    $1,004.99
    Flywheel Fits Models W/ Cummins X15 Engine & 17 Inch ClutchKeep your Cummins X15 running smoothly with this durable Flywheel, engineered for 17-inch clutch systems and Eaton Endurance transmissions...
    29-070400123
    SKU:
    29-070400123
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $1,004.99
    Qty in Cart: 0
    Price:
    $1,004.99
    Subtotal:
  • Stamped Steel Oil Pan Replaces 4710105113, 4710100113, 4710100213, 4710100513 For Detroit DD13 Engine

    Stamped Steel Oil Pan Replaces 4710105113, 4710100113, 4710100213, 4710100513 For Detroit DD13 Engine

    AKMI

    $1,318.99
    Detroit DD13 Stamped Steel Oil PanProtect vital engine components with this quality Stamped Steel Oil Pan engineered for Detroit DD13 engines, replacing part numbers 4710105113, 4710100113,...
    29-072000027
    SKU:
    29-072000027
    Product Type:
    Engine Parts
    Material Options:
    Steel
    Style Options:
    Detroit
    Make:
    Universal Items
    Color:
    Black
    $1,318.99
    Qty in Cart: 0
    Price:
    $1,318.99
    Subtotal:
  • Turbocharger Replaces 4P2858, OR6956, 7W9568, OR6169 For Caterpillar 3406B

    Turbocharger Replaces 4P2858, OR6956, 7W9568, OR6169 For Caterpillar 3406B

    AKMI

    $2,266.99
    Caterpillar 3406B TurbochargerPower through every mile with this high-performance Turbocharger made to replace 4P2858, OR6956, 7W9568, and OR6169 for Caterpillar 3406B applications. Designed to...
    29-070400124
    SKU:
    29-070400124
    Style Options:
    Caterpillar
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $2,266.99
    Qty in Cart: 0
    Price:
    $2,266.99
    Subtotal:
  • Exhaust Manifold Replaces 3917668, 3929778 For Cummins 6CT/ISC

    Exhaust Manifold Replaces 3917668, 3929778 For Cummins 6CT/ISC

    AKMI

    $290.99
    Cummins 6CT/ISC Exhaust ManifoldSupport smooth engine operation with this quality Exhaust Manifold designed to replace part numbers 3917668 and 3929778 for Cummins 6CT/ISC engines. Engineered for...
    29-071200046
    SKU:
    29-071200046
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $290.99
    Qty in Cart: 0
    Price:
    $290.99
    Subtotal:
  • Flywheel Replaces 4710301205, 4710303405 For Detroit DD13/DD15 Engine

    Flywheel Replaces 4710301205, 4710303405 For Detroit DD13/DD15 Engine

    AKMI

    $1,153.99
    160 Teeth Flywheel Fits Models W/ Detroit DD13/DD15 Engine & 17 Inch ClutchMaintain peak performance for your 2013-2015 Detroit DD13 or DD15 engine with this premium Flywheel, designed to replace...
    29-070400118
    SKU:
    29-070400118
    Style Options:
    Detroit
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $1,153.99
    Qty in Cart: 0
    Price:
    $1,153.99
    Subtotal:
  • Camshaft Replaces 3680780, 3412284, 4059198, 4059333, 4298627 For Cummins ISX Engine

    Camshaft Replaces 3680780, 3412284, 4059198, 4059333, 4298627 For Cummins ISX Engine

    AKMI

    $1,957.99
    Cummins ISX CamshaftEnsure long-lasting reliability for your Cummins ISX engine with this forged billet steel Camshaft. Designed to replace 3680780, 3412284, 4059198, 4059333, and 4298627, it handles...
    29-070400120
    SKU:
    29-070400120
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Material Options:
    Billet Steel
    Make:
    Universal Items
    $1,957.99
    Qty in Cart: 0
    Price:
    $1,957.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Red Mini Button Style LED 1.2 Inch Clearance & Marker Light W/ Red Lens

    Red Mini Button Style LED 1.2 Inch Clearance & Marker Light W/ Red Lens

    TRUX ACCESSORIES

    $9.71
    Red Mini Button Style LED 1.2 Inch Marker Light W/ Chrome Plated Bezel & 2 Male BulletsGet a fresh, new look for your truck with this red LED marker light from Trux Accessories. 4 State Trucks can...
    09-1601060248
    SKU:
    09-1601060248
    Finish Options:
    Chrome-Plated
    Truck Class:
    Universal
    Diameter Options:
    3/4 Inch
    Material Options:
    Plastic/Poly
    Color:
    Red
    Shape Options:
    Round
    Product Type:
    Lighting
    Make:
    Universal Items
    $9.71
    Qty in Cart: 0
    Price:
    $9.71
    Subtotal:
  • FREE SHIPPING OVER $249
    0.75 Inch Red LED Clear Lens Mini Button Marker Light W/ 1 Diode

    0.75 Inch Red LED Clear Lens Mini Button Marker Light W/ 1 Diode

    TRUX ACCESSORIES

    $12.47
    LED Mini Button Marker Light Red W/ 1 Diode4 State Trucks offers this mini round marker light by Trux Accessories with 1 red diode and a shiny chrome bezel. Made to withstand outside elements, it is...
    09-1601060247
    SKU:
    09-1601060247
    Shape Options:
    Round
    Color:
    Red
    Truck Class:
    Universal
    Product Type:
    Lighting
    Diameter Options:
    3/4 Inch
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $12.47
    Qty in Cart: 0
    Price:
    $12.47
    Subtotal:
  • BESTfit 3 X 10 X 12 Inch Aluminized Steel Universal Type A Y-Pipe With No Divider Plate

    BESTfit 3 X 10 X 12 Inch Aluminized Steel Universal Type A Y-Pipe With No Divider Plate

    BESTFIT TRUCK PARTS

    $222.99
    BESTfit 3 X 10 X 12 Inch Aluminized Steel Universal Type A Y-Pipe With No Divider PlateKeep the exhaust balanced and exhaust gasses at lower temperatures with this quality Y Pipe. It is constructed...
    09-080100202
    SKU:
    09-080100202
    Product Type:
    Exhaust
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminized Steel
    Diameter Options:
    3 Inch
    Make:
    Universal Items
    $222.99
    Qty in Cart: 0
    Price:
    $222.99
    Subtotal:
  • BESTfit 4 X 12 X 26 Inch Aluminized Steel Universal Type A Y-Pipe With Divider Plate

    BESTfit 4 X 12 X 26 Inch Aluminized Steel Universal Type A Y-Pipe With Divider Plate

    BESTFIT TRUCK PARTS

    $317.99
    BESTfit 4 X 12 X 26 Inch Aluminized Steel Universal Type A Y-Pipe With Divider PlateMade with an aluminized steel, this Universal Type A Y pipe is designed to keep the exhaust balance and gasses at...
    09-080100204
    SKU:
    09-080100204
    Length Options:
    12 Inch
    Height Options:
    12 Inch
    Material Options:
    Aluminized Steel
    Truck Class:
    Heavy Duty
    Diameter Options:
    4 Inch
    Product Type:
    Exhaust
    Make:
    Universal Items
    $317.99
    Qty in Cart: 0
    Price:
    $317.99
    Subtotal:
  • BESTfit 3.5 X 10 X 14 Inch Aluminized Steel Universal Type A Y-Pipe W/ No Divider Plate

    BESTfit 3.5 X 10 X 14 Inch Aluminized Steel Universal Type A Y-Pipe W/ No Divider Plate

    BESTFIT TRUCK PARTS

    $194.99
    Aluminized Steel Type A Universal Y-Pipe W/ 10 Inch Tail & No Divider PlateKeep the exhaust balanced and gasses at lower temperatures with this quality Y Pipe. It is constructed with a corrosion and...
    09-080100203
    SKU:
    09-080100203
    Product Type:
    Exhaust
    Material Options:
    Aluminized Steel
    Truck Class:
    Heavy Duty
    Diameter Options:
    3 Inch
    Make:
    Universal Items
    $194.99
    Qty in Cart: 0
    Price:
    $194.99
    Subtotal:
  • BESTfit 4 X 8 X 12 Inch Aluminized Steel Universal Type A Y-Pipe With No Divider Plate

    BESTfit 4 X 8 X 12 Inch Aluminized Steel Universal Type A Y-Pipe With No Divider Plate

    BESTFIT TRUCK PARTS

    $256.99
    BESTfit 4 X 8 X 12 Inch Aluminized Steel Universal Type A Y-Pipe With No Divider PlateAre you wanting to increase engine power? 4 State trucks offers this quality Y Pipe that can improve the flow of...
    09-080100205
    SKU:
    09-080100205
    Diameter Options:
    4 Inch
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminized Steel
    Product Type:
    Exhaust
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $256.99
    Qty in Cart: 0
    Price:
    $256.99
    Subtotal:
  • Load- Share Air Ride Kit W/ Offset Bolt Brackets

    Load- Share Air Ride Kit W/ Offset Bolt Brackets

    LOAD-SHARE SUSPENSIONS

    $818.99
    Air Ride Kit W/ Offset Bolt BracketsAchieve smoother rides and better load management with the Load-Share Air Ride Kit with offset bolt brackets. Engineered to secure air ride components and ensure...
    29-09050087
    SKU:
    29-09050087
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    Position:
    Kit Full
    Ready To Ship:
    Yes
    $818.99
    Qty in Cart: 0
    Price:
    $818.99
    Subtotal:
  • Load- Share Lower Air Bag Mount W/ U- Bolt Saddles For Load- Share Air Ride Assist Kit 10192 & 10193

    Load- Share Lower Air Bag Mount W/ U- Bolt Saddles For Load- Share Air Ride Assist Kit 10192 & 10193

    LOAD-SHARE SUSPENSIONS

    $72.99
    Lower Air Bag Mount W/ U- Bolt Saddles For Load- Share Air Ride Assist Kit 10192 & 10193Maintain peak performance of your Load-Share Air Ride Assist Kit with this Lower Air Bag Mount. Designed for...
    29-05090174
    SKU:
    29-05090174
    Position:
    Lower
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $72.99
    Qty in Cart: 0
    Price:
    $72.99
    Subtotal:
  • Stainless Steel IFTA Permit Exhaust Bracket W/ 2 Watermelon Light Holes

    Stainless Steel IFTA Permit Exhaust Bracket W/ 2 Watermelon Light Holes

    JML KUSTOMS

    $122.99
    IFTA Permit Exhaust Bracket W/ 1 Watermelon Light Hole Per BracketImprove your truck's compliance and front-end appearance with this Stainless Steel IFTA Permit Exhaust Bracket. Made from 304...
    09-161000063
    SKU:
    09-161000063
    Product Type:
    Lighting
    Make:
    Universal Items
    Material Options:
    Stainless Steel
    $122.99
    Qty in Cart: 0
    Price:
    $122.99
    Subtotal:
  • Stainless Steel IFTA Permit Exhaust Bracket W/ 2 Watermelon Light Holes & Sticker Space

    Stainless Steel IFTA Permit Exhaust Bracket W/ 2 Watermelon Light Holes & Sticker Space

    JML KUSTOMS

    $163.99
    IFTA Permit Exhaust Bracket W/ 1 Watermelon Light Hole Per Bracket & Sticker SpaceEquip your truck with this Stainless Steel IFTA Permit Exhaust Bracket, crafted to securely display IFTA and permit...
    09-161000062
    SKU:
    09-161000062
    Product Type:
    Lighting
    Make:
    Universal Items
    Material Options:
    Stainless Steel
    $163.99
    Qty in Cart: 0
    Price:
    $163.99
    Subtotal:
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Adding your products to cart

Aftermarket Parts for Kenworth T300 & T450 Trucks

We stock hundreds of critical repair and replacement parts for the T300 and classic T450 model. Our goal is to get you the hardware that’ll maintain your vocational Kenworth truck for years to come. Whether you need engine-cooling components, HVAC parts, air brake replacements, or suspension hardware parts, they’re all available for purchase and ready to ship out of our 30,000-square-foot warehouse.

Kenworth T300 Parts & Accessories

Exterior Upgrades & Chrome: Blind-mount front bumpers, grilles, LED cab lights, mirrors, visors, and hood trim accents. Interior Cab Customizations: Floor trim accessories, gauge panel trim, air brake dash knobs, and cab roof trim upgrades. Mechanical & System Replacements: Larger diesel fuel tanks, suspension components, engine parts, and brake components.

Kenworth T450 Parts & Accessories

Bumpers & Exterior Dressings: Custom front bumpers, OEM and Texas-style bumper options, stainless steel or chrome finishes, grilles, and cab lighting. Dash Accessories & Trim: Interior panel upgrades, custom dash knobs, floor trim kits, and driver-focused cabin accents. Drivetrain & Replacement Components: High-capacity fuel storage upgrades, system replacement parts, and reliable mechanical hardware.

Why Upgrade Your Kenworth Medium-Duty Rig?

Boost Visual Appeal: Chrome cab lights, bold grille inserts, and custom bumpers give your truck a clean, head-turning look on the road or at the dock. Improve Cab Comfort: Add floor trim kits, updated door panels, and dash accessories to create a more comfortable, driver-friendly workspace. Increase Efficiency: Larger fuel storage capacity and ergonomic fuel tank accessories give you more range between fuel stops—perfect for regional hauls or long shifts. Cost-Effective Replacements: Get high-quality parts at a better price than many OEM options, all with reliable fit and function. Custom Options: Choose from multiple finishes, materials, and configurations to match your style and how you use your truck.

Frequently Asked Questions About Kenworth T300-T450 Parts

What year models are compatible with your T300-T450 bumpers and parts?

Our Kenworth T300-T450 parts typically fit models from 1994 through 2008, when these trucks were in production. However, compatibility can vary by specific part. The T300 was produced from 1994-2007, while the T330 and T440 ran through 2008. Always check the product description for exact year ranges, or contact our team with your OEM number for guaranteed fitment verification.

Are your bumpers made from chrome-plated steel or stainless steel, and which is better for my truck?

We offer both chrome-plated steel and polished stainless steel options. Chrome-plated bumpers provide a mirror-like finish at a lower cost but require regular maintenance to prevent rust and pitting. Stainless steel bumpers cost more upfront but resist corrosion better and maintain their appearance with minimal care. For trucks in harsh weather conditions or coastal areas, we recommend stainless steel. For show trucks or mild climates, chrome-plated options work well with proper maintenance.

Do I need special tools or professional installation for T300-T450 bumpers?

Most bumper installations require basic hand tools including socket sets, wrenches, and possibly a drill for certain accessories. The bumper itself typically weighs 40-80 pounds, so having a helper is strongly recommended. Installation usually takes 2-4 hours depending on whether you're adding accessories like fog lights or tow hooks. While many customers successfully install bumpers themselves, some prefer professional installation, especially when adding electrical components or dealing with rusted mounting brackets.

Will aftermarket bumpers affect my truck's approach angle or ground clearance?

Standard replacement bumpers maintain factory dimensions and won't affect approach angles or clearance. However, heavy-duty bumpers with integrated tow hooks or extended designs may protrude 2-4 inches further than stock, potentially reducing approach angle. Texas-style bumpers and some custom options sit lower, which can reduce ground clearance by 1-2 inches. Always check product specifications for exact measurements to ensure the bumper meets your operational needs.

What's the difference between OEM-style and Texas bumpers for T300-T450 trucks?

OEM-style bumpers replicate the factory design with standard mounting points and original dimensions, making them direct replacements. Texas bumpers (also called Texas square bumpers) feature a distinctive squared-off design that extends further from the truck and sits lower, offering enhanced protection and a custom appearance. Texas bumpers typically include more mounting points for accessories but may require slight modifications to air lines or other components during installation.


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