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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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  • Phantom 1 Design Light Bezel 6.6875 X 2.6875 Inch W/ Triple Chrome Plating

    Phantom 1 Design Light Bezel 6.6875 X 2.6875 Inch W/ Triple Chrome Plating

    UNITED PACIFIC

    $5.99
    Light Bezel Phantom 1 Design 6.6875 X 2.6875 Inch W/ Triple Chrome Plating* High Quality Light Bezel* Made Of Injection Molded Plastic* Triple Chrome Plating Process* Phantom I Design* Designed To...
    09-160500006
    SKU:
    09-160500006
    Product Type:
    Lighting
    Make:
    Universal Items
    $5.99
    Qty in Cart: 0
    Price:
    $5.99
    Subtotal:
  • Low Profile Flat Red 2 Inch Round LED Clearance & Marker Light W/ Red Lens

    Low Profile Flat Red 2 Inch Round LED Clearance & Marker Light W/ Red Lens

    UNITED PACIFIC

    $4.99
    Low Profile Flat Red 2 Inch Round LED Marker Light W/ 2 Female Connector* High Quality Clearance/Marker Light* Low Profile Flat Design* Includes:  - Polycarbonate Lens (Sonically Sealed To Housing) ...
    09-1601060679
    SKU:
    09-1601060679
    Product Type:
    Lighting
    Make:
    Universal Items
    $4.99
    Qty in Cart: 0
    Price:
    $4.99
    Subtotal:
  • H8/H11/H16 Bulb 3.3125 Inch W/ 6 Diode White LED

    H8/H11/H16 Bulb 3.3125 Inch W/ 6 Diode White LED

    UNITED PACIFIC

    $43.99
    3.3125 Inch H8/H11/H16 Bulb W/ Fanless Design & 110 Lumens Output* High Quality H8/H11/H16 Bulb* H8/H11/H16 Style Plug* Fanless Design (Proprietary Aluminum Heat Sink Dissipates Excess Heat)*...
    09-1601001084
    SKU:
    09-1601001084
    Product Type:
    Lighting
    Make:
    Universal Items
    $43.99
    Qty in Cart: 0
    Price:
    $43.99
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  • On Sale
    Amber/Pink Dual Revolution M1 Style Gen 4 LED Marker & Auxiliary Light W/ Clear Lens

    Amber/Pink Dual Revolution M1 Style Gen 4 LED Marker & Auxiliary Light W/ Clear Lens

    TRUX ACCESSORIES

    Now: $28.47
    Was: $35.59
    Amber/Pink Dual Revolution M1 Style Gen 4 LED Marker Light W/ Chrome ABS Plastic Bezel & 3 Male Bullet PlugsAdd versatile lighting and a custom look to your truck with theAmber/Pink Dual Revolution...
    09-160105316
    SKU:
    09-160105316
    Product Type:
    Lighting
    Make:
    Universal Items
    Now: $28.47
    Was: $35.59
    Qty in Cart: 0
    Price:
    Now: $28.47
    Was: $35.59
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  • 10 Piece Mounting Hardware Set For Watermelon Cab Lights

    10 Piece Mounting Hardware Set For Watermelon Cab Lights

    UNITED PACIFIC

    $2.99
    Mounting Hardware Set Fits Watermelon Cab Lights 10 Piece* High Quality Mounting Hardware Set* Made of Stainless Steel* For Mounting Watermelon Cab Lights (Lights Not Included)* Includes:  - (10) M4...
    09-16080021
    SKU:
    09-16080021
    Product Type:
    Lighting
    Make:
    Universal Items
    $2.99
    Qty in Cart: 0
    Price:
    $2.99
    Subtotal:
  • 10 Pack 1157 Type Clear Bulb W/ Indexed Double Contact Bayonet Base

    10 Pack 1157 Type Clear Bulb W/ Indexed Double Contact Bayonet Base

    UNITED PACIFIC

    $5.99
    Clear Bulb 1157 Type W/ Indexed Double Contact Bayonet Base 10 Pack* High Quality Incandescent Bulb* 1157 Type* Indexed Double Contact Bayonet Base* Sold As Pack (10)* Warranty On Incandescent Bulbs...
    09-16000219
    SKU:
    09-16000219
    Product Type:
    Lighting
    Make:
    Universal Items
    $5.99
    Qty in Cart: 0
    Price:
    $5.99
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  • Mini Rectangular Rubber Grommet 3.25 X 1.875 Inch 10 Pack

    Mini Rectangular Rubber Grommet 3.25 X 1.875 Inch 10 Pack

    UNITED PACIFIC

    $6.99
    10 Pack Mini Rectangular Rubber Grommet 3.25 X 1.875 Inch* High Quality Mini Rectangular Grommet* Made Of PVC Rubber* Designed For Mini Rectangular Style Lights (Lights Not Included)* Provides...
    09-16020548
    SKU:
    09-16020548
    Product Type:
    Lighting
    Make:
    Universal Items
    $6.99
    Qty in Cart: 0
    Price:
    $6.99
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  • Thread On Air Valve Knob 50 Caliber Bullet Style 5/8 Inch

    Thread On Air Valve Knob 50 Caliber Bullet Style 5/8 Inch

    UNITED PACIFIC

    $38.99
    5/8 Inch 50 Caliber Bullet Style Air Valve Knob Thread On* High Quality Air Valve Knob* Made Of Die Cast Aluminum* 50 Caliber Bullet Style* Removable Thread Lock Included To Prevent Loosening Of...
    09-15010325
    SKU:
    09-15010325
    Product Type:
    Interior
    Make:
    Universal Items
    $38.99
    Qty in Cart: 0
    Price:
    $38.99
    Subtotal:
  • On Sale
    Amber/Red & Purple Dual Function Mini Round Double Face LED Clearance, Marker & Auxiliary Light W/ Clear Lens

    Amber/Red & Purple Dual Function Mini Round Double Face LED Clearance, Marker & Auxiliary Light W/ Clear Lens

    TRUX ACCESSORIES

    Now: $40.79
    Was: $50.99
    Amber/Red & Purple Dual Function Mini Round Double Face LED Marker Light W/ Zinc Alloy Housing & Single Mount PostGive your truck a unique lighting upgrade with theAmber/Red & Purple Dual Function...
    09-160105324
    SKU:
    09-160105324
    Product Type:
    Lighting
    Make:
    Universal Items
    Now: $40.79
    Was: $50.99
    Qty in Cart: 0
    Price:
    Now: $40.79
    Was: $50.99
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  • FREE SHIPPING OVER $249
    Automatic Mack Drive Axles Haldex Type Slack Adjuster W/ 6 Inch 16 Degree Angled Arm Replaces 135.2832

    Automatic Mack Drive Axles Haldex Type Slack Adjuster W/ 6 Inch 16 Degree Angled Arm Replaces 135.2832

    AFTERMARKET

    $78.99
    Automatic Mack Drive Axles Haldex Type Slack Adjuster W/ 1.5 Inch - 28 Spline Diameter Replaces 135.2832* High Quality Slack Adjuster* Automatic, Mack Drive Axles, Haldex Type* 28 Spline Count* 16...
    09-05170517
    SKU:
    09-05170517
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $78.99
    Qty in Cart: 0
    Price:
    $78.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Automatic Gunite Type Slack Adjuster W/ 5.5 Inch Straight Arm Height

    Automatic Gunite Type Slack Adjuster W/ 5.5 Inch Straight Arm Height

    AFTERMARKET

    $78.99
    Automatic Gunite Type Slack Adjuster W/ 1.5 Inch - 28 Spline Diameter* High Quality Slack Adjuster* Automatic Gunite Type* 28 Spline Count* Straight Arm* Adjuster Dimensions:  - 5.5 Inch Arm Height ...
    09-05170516
    SKU:
    09-05170516
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $78.99
    Qty in Cart: 0
    Price:
    $78.99
    Subtotal:
  • FREE SHIPPING
    ABS Hydraulic Motor Kit W/ Hydraulic Pump & Motor Assembly Replaces S21808, S4784079472

    ABS Hydraulic Motor Kit W/ Hydraulic Pump & Motor Assembly Replaces S21808, S4784079472

    AFTERMARKET

    $1,047.99
    Meritor ABS Hydraulic Pump & Motor Assembly Replaces S21808, S4784079472* High Quality ABS Hydraulic Motor Kit* Meritor ABS Hydraulic Pump And Motor Assembly* Used By HABS-E Braking Electronics* Sold...
    09-05170518
    SKU:
    09-05170518
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $1,047.99
    Qty in Cart: 0
    Price:
    $1,047.99
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  • FREE SHIPPING OVER $249
    Black Poly Quarter Fender Kit 24 X 24 Inch W/ Round Tube Support Internal Mount Replaces 03101657, 1000-QF1900

    Black Poly Quarter Fender Kit 24 X 24 Inch W/ Round Tube Support Internal Mount Replaces 03101657, 1000-QF1900

    AFTERMARKET

    $109.99
    24 X 24 Inch Black Poly Quarter Fender Kit W/ Hardware Kit Replaces 03101657, 1000-QF1900* High Quality Quarter Fender Kit* Made Of Polycarbonate* Round Tube Support Internal Mount* Includes:  - (2)...
    09-11050636
    SKU:
    09-11050636
    Product Type:
    Rear Fenders
    Make:
    Universal Items
    $109.99
    Qty in Cart: 0
    Price:
    $109.99
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  • FREE SHIPPING OVER $249
    Automatic Drive Axle Haldex Type Slack Adjuster W/ 1.5 Inch 28 Spline Diameter Replaces 133.2830

    Automatic Drive Axle Haldex Type Slack Adjuster W/ 1.5 Inch 28 Spline Diameter Replaces 133.2830

    AFTERMARKET

    $78.99
    Automatic Drive Axle Haldex Type Slack Adjuster W/ 34 Degree Angled Arm & 2 Bolt Holes 5 And 6 Inch C To C Arm Height* High Quality Slack Adjuster* Automatic, Drive Axles, Haldex Type* 28 Spline...
    09-05170513
    SKU:
    09-05170513
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $78.99
    Qty in Cart: 0
    Price:
    $78.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Automatic Gunite Type Slack Adjuster W/ 5.5 Inch Straight Arm Height Replaces 138.1010

    Automatic Gunite Type Slack Adjuster W/ 5.5 Inch Straight Arm Height Replaces 138.1010

    AFTERMARKET

    $78.99
    Automatic Gunite Type Slack Adjuster W/ 1.5 Inch - 28 Spline Diameter* High Quality Slack Adjuster* Automatic Gunite Type* 10 Spline Count* Straight Arm* Clevis Kit Gunite Type Included* Adjuster...
    09-05170514
    SKU:
    09-05170514
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $78.99
    Qty in Cart: 0
    Price:
    $78.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Automatic, Drive Axles, Haldex Type Slack Adjuster W/ 5.5 Inch Arm Height & 1.5 Inch 28 Spline Diameter Replaces 135.2835

    Automatic, Drive Axles, Haldex Type Slack Adjuster W/ 5.5 Inch Arm Height & 1.5 Inch 28 Spline Diameter Replaces 135.2835

    AFTERMARKET

    $78.99
    Automatic, Drive Axles, Haldex Type Slack Adjuster W/ 34 Degree Angled Arm* High Quality Slack Adjuster* Automatic, Drive Axles, Haldex Type* 28 Spline Count* 34 Degree Angled Arm* Haldex Type...
    09-05170512
    SKU:
    09-05170512
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $78.99
    Qty in Cart: 0
    Price:
    $78.99
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  • FREE SHIPPING OVER $249
    Spring Brake Valve W/ 3/8 Inch NPT Control & Supply Port Replaces 170.110171

    Spring Brake Valve W/ 3/8 Inch NPT Control & Supply Port Replaces 170.110171

    AFTERMARKET

    $72.99
    Spring Brake Valve W/ 1/2 & 3/8 Inch Reservoir Ports, 2 - 3/8 Inch Delivery Port* High Quality Spring Brake Valve* Protected Reservoir Spring Brake Control Valve* Control And Supply Ports Are...
    09-05170509
    SKU:
    09-05170509
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $72.99
    Qty in Cart: 0
    Price:
    $72.99
    Subtotal:
  • FREE SHIPPING OVER $249
    MV3 Dash Valve W/ Integral Push=Lock-Connect Fittings & 4 M6 X 1 - 6H Mounting Holes Replaces 170.800622WF, 5006257

    MV3 Dash Valve W/ Integral Push=Lock-Connect Fittings & 4 M6 X 1 - 6H Mounting Holes Replaces 170.800622WF, 5006257

    AFTERMARKET

    $200.99
    MV3 Dash Valve 5.8 X 1.5 Inch C To C W/ 5 - 3/8 Inch PLC Ports* High Quality Dash Valve* MV3 Type Dash Control Module With Integral Push-Lock-Connect Fittings* Trailer Trip Pressure 25-45 PSI*...
    09-05170508
    SKU:
    09-05170508
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $200.99
    Qty in Cart: 0
    Price:
    $200.99
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  • FREE SHIPPING OVER $249
    T18/24 Disc Brake Chamber W/ 2.5 Inch Ram Stroke & 4 Inch Push Rod Replaces 179.SB1824DB, LCP1824D

    T18/24 Disc Brake Chamber W/ 2.5 Inch Ram Stroke & 4 Inch Push Rod Replaces 179.SB1824DB, LCP1824D

    AFTERMARKET

    $162.99
    T18/24 Disc Brake Chamber 9.125 Chamber Height & 4.75 Inch C To C Mount Hole Distance* High Quality Disc Brake Chamber* T18/24 Disc Brake* Spring Brake Chamber Type* (2) M16 - 1.5 X 1.75 Inch...
    09-05170510
    SKU:
    09-05170510
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $162.99
    Qty in Cart: 0
    Price:
    $162.99
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  • FREE SHIPPING OVER $249
    FF2 Type Full Function Trailer Valve W/ 2 Way Check & 4 Port Relay Valves Replaces 170.KN28601

    FF2 Type Full Function Trailer Valve W/ 2 Way Check & 4 Port Relay Valves Replaces 170.KN28601

    AFTERMARKET

    $118.99
    FF2 Type Full Function Trailer Valve W/ Control, Spring Brake, Supply, Reservoir & Delivery Ports* High Quality Trailer Valve* FF2 Type Full Function Valve* Combines The Functions of Pressure...
    09-05170504
    SKU:
    09-05170504
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $118.99
    Qty in Cart: 0
    Price:
    $118.99
    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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