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Peterbilt 379 Parts

At 4 State Trucks, you’ll find everything you need to keep your iconic 379 model running strong and looking sharp. From bumpers and exhausts to fuel tanks, fenders, and chrome trim, we’ve got Peterbilt accessories and parts designed to fit your specific model year (87’ – 07’). Whether it’s a full-body restoration, a small component replacement, or a custom upgrade, our lineup has what you need.

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  • FREE SHIPPING
    Air Dryer Cartridge World American AD-IS Standard Design Replaces 170.800383, 3625-823-C

    Air Dryer Cartridge World American AD-IS Standard Design Replaces 170.800383, 3625-823-C

    AFTERMARKET

    $430.99
    Air Dryer Cartridge 1/4 Inch Accessory & Suspension Ports W/O Service Port* High Quality Air Dryer Cartridge* World American AD-IS Standard Cartridge Design* 12V DC, 90 W* 1/4 Inch Accessory And...
    09-05170466
    SKU:
    09-05170466
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $430.99
    Qty in Cart: 0
    Price:
    $430.99
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  • FREE SHIPPING
    Air Dryer Cartridge Complete SS1200UP Type Coalescing Replaces 20935355, 20991972

    Air Dryer Cartridge Complete SS1200UP Type Coalescing Replaces 20935355, 20991972

    AFTERMARKET

    $312.99
    Air Dryer Cartridge 12V DC & 100W* High Quality Air Dryer Cartridge* Complete SS1200UP Type Coalescing Air Dryer Assembly* 12V DC, 100W* Uses External Purge Tank, And Uses The Discharge Line For...
    09-05170465
    SKU:
    09-05170465
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $312.99
    Qty in Cart: 0
    Price:
    $312.99
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  • Stainless Steel Angled Bottom Mud Flap Weight 24 Inch Bolted

    Stainless Steel Angled Bottom Mud Flap Weight 24 Inch Bolted

    TRUX ACCESSORIES

    $52.99
    Bolted Angled Bottom Mud Flap Weight 24 Inch Stainless SteelAdd a polished, custom look to your truck with theStainless Steel Angled Bottom Mud Flap Weight 24 Inch Bolted. Crafted from durable...
    09-0507384
    SKU:
    09-0507384
    Product Type:
    Mud Flaps
    Ready To Ship:
    Yes
    Make:
    Universal Items
    $52.99
    Qty in Cart: 0
    Price:
    $52.99
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  • FREE SHIPPING OVER $249
    Air Dryer Cartridge 7.388 X 7.28 Inch Replaces 170.65624K, 065624 For ADIP Type Air Dryer

    Air Dryer Cartridge 7.388 X 7.28 Inch Replaces 170.65624K, 065624 For ADIP Type Air Dryer

    AFTERMARKET

    $160.99
    Air Dryer Cartridge W/ O-Ring & Grease* High Quality Air Dryer Cartridge* Replacement Desiccant Cartridge For ADIP Type Air Dryer* 150 Lb Per Square Inch Max Operation Pressure* Includes:  -...
    09-05170471
    SKU:
    09-05170471
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $160.99
    Qty in Cart: 0
    Price:
    $160.99
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  • FREE SHIPPING OVER $249
    Air Dryer Cartridge 6.45 X 5.35 Inch W/ Cartridge & O-Ring

    Air Dryer Cartridge 6.45 X 5.35 Inch W/ Cartridge & O-Ring

    AFTERMARKET

    $41.99
    6.45 X 5.35 Inch Air Dryer Cartridge W/ Cartridge & O-Ring* High Quality Air Dryer Cartridge* SG39 - 1.5 Threads* Desiccant Coalescing* 145 Lbs Max Operating Pressure Per Square Inch* Includes:  -...
    09-05170462
    SKU:
    09-05170462
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $41.99
    Qty in Cart: 0
    Price:
    $41.99
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  • Stainless Steel Angled Welded 24 Inch Bottom Mud Flap Weight

    Stainless Steel Angled Welded 24 Inch Bottom Mud Flap Weight

    TRUX ACCESSORIES

    $103.99
    24 Inch Angled Stainless Steel Welded Bottom Mud Flap WeightGive your truck's mud flaps a custom, polished appearance with theStainless Steel Angled Welded 24 Inch Bottom Mud Flap Weights. Designed...
    09-05070189
    SKU:
    09-05070189
    Product Type:
    Mud Flaps
    Ready To Ship:
    Yes
    Make:
    Universal Items
    $103.99
    Qty in Cart: 0
    Price:
    $103.99
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  • FREE SHIPPING OVER $249
    Alcohol Evaporator 9.906 Inch W/ 2.5 C To C Bolt Hole Distance

    Alcohol Evaporator 9.906 Inch W/ 2.5 C To C Bolt Hole Distance

    AFTERMARKET

    $88.99
    Alcohol Evaporator W/ 1/2 Inch NPT Ports Replaces 3507884C, 3507884C91* High Quality Alcohol Evaporator* Alcohol Evaporator Automatic Vaporizing Device For Keeping Air Lines Free of Ice* (2) 1/2 Inch...
    09-05170467
    SKU:
    09-05170467
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $88.99
    Qty in Cart: 0
    Price:
    $88.99
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  • Chrome Steel Mud Flap Hangers 33 X 5.5 Inch W/ 2.5 Inch Bolt Spacing

    Chrome Steel Mud Flap Hangers 33 X 5.5 Inch W/ 2.5 Inch Bolt Spacing

    TRUX ACCESSORIES

    $264.99
    Mud Flap Hangers 33 X 5.5 Inch Chrome Steel W/ 2.5 Inch Bolt SpacingGive your truck a quality rear end upgrade with33 Inch Chrome Steel Mud Flap Hangers. Built from stainless steel, these high...
    09-05070191
    SKU:
    09-05070191
    Product Type:
    Mud Flaps
    Make:
    Universal Items
    $264.99
    Qty in Cart: 0
    Price:
    $264.99
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  • Smooth Aluminum Underbody Toolbox W/ Single Swing Door 60 X 24 X 24 Inch

    Smooth Aluminum Underbody Toolbox W/ Single Swing Door 60 X 24 X 24 Inch

    TPHD

    $919.99
    60 X 24 X 24 Inch Smooth Aluminum Underbody Toolbox W/ Single Swing Door* High Quality Underbody Toolbox* Made Of Aluminum* Smooth Finish* Lightweight Yet Durable Construction* Includes:  - Single...
    09-0201157
    SKU:
    09-0201157
    Product Type:
    Toolboxes
    Ready To Ship:
    Yes
    Make:
    Universal Items
    $919.99
    Qty in Cart: 0
    Price:
    $919.99
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    C Series Direct Mount Hydraulic Pump W/ Left Rotation & 13 Spline

    C Series Direct Mount Hydraulic Pump W/ Left Rotation & 13 Spline

    AFTERMARKET

    $723.99
    Direct Mount C Series Hydraulic Pump 49 GPM & 3000 PSI* High Quality Hydraulic Pump* Left Hand Rotation* Gear Pump With Air Shift* 49 GPM At 1800 RPM* 13 Input Spline* 3000 Max RPM* 2500 Max Working...
    09-02500272
    SKU:
    09-02500272
    Product Type:
    Cargo Control
    Make:
    Universal Items
    $723.99
    Qty in Cart: 0
    Price:
    $723.99
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  • FREE SHIPPING OVER $249
    Purge Valve Kit W/ WABCO Type Design Replaces 0587-950014P, 170.950014

    Purge Valve Kit W/ WABCO Type Design Replaces 0587-950014P, 170.950014

    AFTERMARKET

    $9.99
    Purge Valve Kit W/ O-Rings, Washer, Shims & Spring* High Quality Purge Valve Kit* WABCO Type Design* Compatible With SS1200/1800, SS1200 Plus Type Air Dryers (Not Included)* Includes:  - O-Rings  -...
    09-05170463
    SKU:
    09-05170463
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $9.99
    Qty in Cart: 0
    Price:
    $9.99
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  • 3/4 X 1 1/2 Inch Push On Pointed Nut Covers Chrome Plastic 100 Pack

    3/4 X 1 1/2 Inch Push On Pointed Nut Covers Chrome Plastic 100 Pack

    UNITED PACIFIC

    $62.99
    100 Pack Chrome Plastic Push On Pointed Nut Covers* High Quality Nut Cover* Made Of Injection Molded Plastic* Triple Chrome Plated Finish* Pointed Design* With Flange* Dimensions:  - 1.50 Inch...
    09-05060105
    SKU:
    09-05060105
    Product Type:
    Wheels
    Make:
    Universal Items
    $62.99
    Qty in Cart: 0
    Price:
    $62.99
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  • Smooth Aluminum Underbody Toolbox W/ Single Swing Door 24 X 24 X 24 Inch

    Smooth Aluminum Underbody Toolbox W/ Single Swing Door 24 X 24 X 24 Inch

    TPHD

    $659.99
    24 X 24 X 24 Inch Smooth Aluminum Underbody Toolbox W/ Single Swing Door* High Quality Underbody Toolbox* Made Of Aluminum* Smooth Finish* Lightweight Yet Durable Construction* Includes:  - Single...
    09-0201154
    SKU:
    09-0201154
    Product Type:
    Toolboxes
    Ready To Ship:
    Yes
    Make:
    Universal Items
    $659.99
    Qty in Cart: 0
    Price:
    $659.99
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  • Smooth Aluminum Underbody Toolbox W/ Single Swing Door 36 X 24 X 24 Inch

    Smooth Aluminum Underbody Toolbox W/ Single Swing Door 36 X 24 X 24 Inch

    TPHD

    $799.99
    36 X 24 X 24 Inch Smooth Aluminum Underbody Toolbox W/ Single Swing Door* High Quality Underbody Toolbox* Made Of Aluminum* Smooth Finish* Lightweight Yet Durable Construction* Includes:  - Single...
    09-0201155
    SKU:
    09-0201155
    Product Type:
    Toolboxes
    Ready To Ship:
    Yes
    Make:
    Universal Items
    $799.99
    Qty in Cart: 0
    Price:
    $799.99
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    Stainless Steel Rear Center Panel 33.625 X 20 X 3.24 Inch W/ 5 Round 4 Inch Red LEDs, Clear Lens & Round Corners

    Stainless Steel Rear Center Panel 33.625 X 20 X 3.24 Inch W/ 5 Round 4 Inch Red LEDs, Clear Lens & Round Corners

    TRUX ACCESSORIES

    $979.99
    Rear Center Panel 33.625 X 20 X 3.24 Inch Stainless Steel W/ 5 Round 4 Inch Red LEDs, Clear Lens & Round CornersEnhance your truck's rear lighting setup with theStainless Steel Rear Center Panel 33...
    09-01110124
    SKU:
    09-01110124
    Product Type:
    Bumpers
    Make:
    Universal Items
    $979.99
    Qty in Cart: 0
    Price:
    $979.99
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  • Chrome Angled Welded 24 Inch Bottom Mud Flap Weight

    Chrome Angled Welded 24 Inch Bottom Mud Flap Weight

    TRUX ACCESSORIES

    $28.71
    24 Inch Angled Chrome Welded Bottom Mud Flap WeightAdd a polished custom touch to your truck with theChrome Angled Welded 24 Inch Bottom Mud Flap Weight. Featuring durablechrome plated steel build,...
    09-05070188
    SKU:
    09-05070188
    Product Type:
    Mud Flaps
    Make:
    Universal Items
    $28.71
    Qty in Cart: 0
    Price:
    $28.71
    Subtotal:
  • Smooth Aluminum Underbody Toolbox W/ Single Swing Door 48 X 24 X 24 Inch

    Smooth Aluminum Underbody Toolbox W/ Single Swing Door 48 X 24 X 24 Inch

    TPHD

    $869.99
    48 X 24 X 24 Inch Smooth Aluminum Underbody Toolbox W/ Single Swing Door* High Quality Underbody Toolbox* Made Of Aluminum* Smooth Finish* Lightweight Yet Durable Construction* Includes:  - Single...
    09-0201156
    SKU:
    09-0201156
    Product Type:
    Toolboxes
    Ready To Ship:
    Yes
    Make:
    Universal Items
    $869.99
    Qty in Cart: 0
    Price:
    $869.99
    Subtotal:
  • FREE SHIPPING
    Stainless Steel Rear Center Panel W/ 4 Round 4 Inch & 6 Round 2 Inch LEDs

    Stainless Steel Rear Center Panel W/ 4 Round 4 Inch & 6 Round 2 Inch LEDs

    TRUX ACCESSORIES

    $430.99
    Rear Center Panel Stainless Steel W/ 4 Round 4 Inch & 6 Round 2 Inch LEDsGive your truck's rear end a bold, polished upgrade with the33.625-Inch Stainless Steel Rear Center Panel with 5 Round 4 Inch...
    09-01110121
    SKU:
    09-01110121
    Product Type:
    Bumpers
    Make:
    Universal Items
    $430.99
    Qty in Cart: 0
    Price:
    $430.99
    Subtotal:
  • FREE SHIPPING
    Stainless Steel Rear Center Panel 33.625 X 20 X 3.24 Inch W/ 4 Round 4 Inch Light Holes & Rounded Corners

    Stainless Steel Rear Center Panel 33.625 X 20 X 3.24 Inch W/ 4 Round 4 Inch Light Holes & Rounded Corners

    TRUX ACCESSORIES

    $647.99
    Rear Center Panel 33.625 X 20 X 3.24 Inch Stainless Steel W/ 4 Round 4 Inch Light Holes & Rounded CornersComplete your truck's rear lighting setup with theStainless Steel Rear Center Panel with 5...
    09-01110120
    SKU:
    09-01110120
    Product Type:
    Bumpers
    Make:
    Universal Items
    $647.99
    Qty in Cart: 0
    Price:
    $647.99
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Adding your products to cart

Shop for Repair & Performance Parts for the Peterbilt 379

We stock aftermarket parts from top-tier brands, each engineered to meet or exceed classic OEM Peterbilt 379 parts for both newer and older 379 model years. Replacement parts reduce downtime and can enhance the efficiency of your big rig. Easily swap out worn-out or broken mechanical components: - Turbochargers and exhaust manifolds. - Radiators, heater hoses, and electrical components. -Peterbilt 379 front shocks, air-ride suspension hardware and drivetrain or powertrain replacements. Installing high-quality aftermarket performance upgrades can lead to a positive ROI and stronger performance. Whether your Peterbilt needs an exhaust system upgrade or an extensive suspension rebuild, we've got the parts to get the job done.

Add Polished Chrome Upgrades

Elevate your truck's look with exterior chrome parts: stainless steel visors, grilles, rear fenders, and front bumpers for Peterbilt 379. Add larger Peterbilt diesel fuel storage tanks and a new set of Peterbilt 379 chrome stack tops.

Customize the Interior with Peterbilt 379 Accessories

Our Peterbilt 379 interior accessories let you mix and match designs to fit your truck's theme. For decades, we've helped source parts for drivers to build their custom show trucks. Customizing the interior? If you can dream it, there's likely a product to help you build it. Browse through dash trims, upholstery, dual-tone interior cab lights, vent trim covers, custom foot pedals, and more. Interior accessories help to customize the entirety of your rig. You can add unique rear sleeper window shapes, chrome-polished mirror accessories, cabin doors, and in-cab vinyl flooring kits. When it comes to fine-tuning your custom interior, there are endless options. Filter through a vast selection of products via the materials, design features, sizes, and aftermarket brands that truckers trust. At the bottom of the page, you can review the item details, check for product specs, search for limited-time discounts on popular items, and add the order to cart. Easy.

Frequently Asked Questions About Peterbilt 379 Parts

What years are Peterbilt 379 parts compatible with, and will they fit my specific model?

Most Peterbilt 379 parts fit 1987–2007 trucks, but fitment depends on the exact part and your setup (standard vs extended hood, trim packages, modifications). Always confirm OEM specs and model details before ordering. For custom builds, contact support with your truck info.

What's the difference between aftermarket and OEM Peterbilt 379 parts in terms of quality and durability?

OEM parts match factory specs and usually cost more. Quality aftermarket parts can perform similarly for 30–50% less, especially for chrome and accessories. Look for strong materials (ex: 16-gauge+ bumpers), good plating/finishing, and a warranty—avoid ultra-cheap parts that rust or peel quickly.

How difficult is it to install Peterbilt 379 bumpers and what tools do I need?

Most installs take 2–4 hours with basic tools: socket set (especially 3/4" and 7/8"), torque wrench, jack stands/lift, and ideally a helper. Many bumpers use factory mounts; some may need minor drilling. Rusted hardware and alignment are the usual challenges. Pro install is often $200–$400.

What chrome and finish options are available for Peterbilt 379 parts, and how do they hold up?

Triple chrome: best shine, needs regular upkeep (especially in winter). Powder coat: tough and chip-resistant, less mirror-like. Polished stainless: higher upfront cost, won’t rust, low maintenance. Choose based on climate and how much maintenance you want to do.

Which Peterbilt 379 parts should I prioritize replacing for both appearance and functionality?

Start with safety items (headlights/marker lights). Next, replace rust-prone parts like bumpers, battery boxes, and step plates. Then move to high-impact upgrades like air cleaners and exhaust. Interior items (dash panels, handles) improve daily comfort. Prices can vary. Budget $2,000-5,000 for a comprehensive exterior refresh, or tackle projects individually starting with the most visible or damaged components.


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