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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.

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • 15.00 X 4.00 Inch 10 Hole Brake Drum Replaces 10081079, 123421, 3721X, 17QJ4106, 123366, 85123366002, 85123421002, 61527, 61527B

    15.00 X 4.00 Inch 10 Hole Brake Drum Replaces 10081079, 123421, 3721X, 17QJ4106, 123366, 85123366002, 85123421002, 61527, 61527B

    AFTERMARKET

    $303.99
    10 Hole 15.00 X 4.00 Inch Brake Drum* High Quality Brake Drum* Balanced To 20 Inch - Oz* (10) 1 Inch Bolt Holes* For Brake SuRFace Diameter 15 Inch X 4 Inch* 8.78 Inch Overall Width* 4.78 Inch Brake...
    09-05170171
    SKU:
    09-05170171
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $303.99
    Qty in Cart: 0
    Price:
    $303.99
    Subtotal:
  • 16.50 X 7.00 Inch 10 Hole Brake Drum Replaces 12386614, 3122948002, 85122948002, 66865, 66865B

    16.50 X 7.00 Inch 10 Hole Brake Drum Replaces 12386614, 3122948002, 85122948002, 66865, 66865B

    AFTERMARKET

    $500.99
    10 Hole 16.50 X 7.00 Inch Brake Drum* High Quality Brake Drum* Balanced To 20 Inch - Oz* (10) 0.810 Inch Bolt Holes* For Brake SuRFace Diameter 16.5 Inch X 7 Inch* 10.310 Inch Overall Width* 7.50...
    09-05170167
    SKU:
    09-05170167
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $500.99
    Qty in Cart: 0
    Price:
    $500.99
    Subtotal:
  • 16.50 X 6.00 Inch 20K Brake Shoe Kit Replaces 819706, R700025, 314146, R507094, 818278, E10197, E5479A, R567503, 19-915

    16.50 X 6.00 Inch 20K Brake Shoe Kit Replaces 819706, R700025, 314146, R507094, 818278, E10197, E5479A, R567503, 19-915

    AFTERMARKET

    $145.99
    16.50 X 6.00 Inch Eaton ES2 Type 20K Brake Shoe Kit* High Quality Brake Shoe Box Kit* Eaton ES2 Type* Open Anchor End* Open Roller End* Double Web* 20K Lbs Value* Kit Includes:  - (2) Unlined Brake...
    09-05170169
    SKU:
    09-05170169
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $145.99
    Qty in Cart: 0
    Price:
    $145.99
    Subtotal:
  • 1/2 X 1/2 Inch Brass Hose Coupling W/ Spring Replaces E8599

    1/2 X 1/2 Inch Brass Hose Coupling W/ Spring Replaces E8599

    AUTOMANN USA

    $17.43
    1/2 X 1/2 Inch Hose Coupling W/ SpringDepend on the 1/2 X 1/2 Inch Brass Hose Coupling with Spring for secure air brake connections, designed to replace E8599. Engineered for air brake hoses, this...
    09-05170161
    SKU:
    09-05170161
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Diameter Options:
    1/2 Inch
    Make:
    Universal Items
    $17.43
    Qty in Cart: 0
    Price:
    $17.43
    Subtotal:
  • 16.50 X 6.00 Inch 23K Brake Shoe Kit Replaces 819706, R700025, 314146, R507094, 818278, E10197, E5479A, R567503, 19-915

    16.50 X 6.00 Inch 23K Brake Shoe Kit Replaces 819706, R700025, 314146, R507094, 818278, E10197, E5479A, R567503, 19-915

    AFTERMARKET

    $148.99
    16.50 X 6.00 Inch Eaton ES2 Type 23K Brake Shoe Kit* High Quality Brake Shoe Box Kit* Eaton ES2 Type* Open Anchor End* Open Roller End* Double Web* 23K Lbs Value* Kit Includes:  - (2) Unlined Brake...
    09-05170170
    SKU:
    09-05170170
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $148.99
    Qty in Cart: 0
    Price:
    $148.99
    Subtotal:
  • 3/8 X 3/8 Inch Brass Hose Coupling W/ Spring Replaces E8596

    3/8 X 3/8 Inch Brass Hose Coupling W/ Spring Replaces E8596

    AUTOMANN USA

    $9.13
    3/8 X 3/8 Inch Hose Coupling W/ Spring* High Quality Hose Coupling* Fitting Type: Air Brake Hose* Connection: Hose Inner Diameter To Male NPT* Spring Attached To Male Connector End* Made Of Brass*...
    09-05170158
    SKU:
    09-05170158
    Diameter Options:
    3/8 Inch
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $9.13
    Qty in Cart: 0
    Price:
    $9.13
    Subtotal:
  • 3/8 X 1/2 Inch Brass Hose Coupling W/ Spring Replaces E8597

    3/8 X 1/2 Inch Brass Hose Coupling W/ Spring Replaces E8597

    AUTOMANN USA

    $9.45
    3/8 X 1/2 Inch Hose Coupling W/ Spring* High Quality Hose Coupling* Fitting Type: Air Brake Hose* Connection: Hose Inner Diameter To Male NPT* Spring Attached To Male Connector End* Made Of Brass*...
    09-05170159
    SKU:
    09-05170159
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Make:
    Universal Items
    $9.45
    Qty in Cart: 0
    Price:
    $9.45
    Subtotal:
  • 3/8 X 1/4 Inch Brass Hose Coupling W/ Spring Replaces E8595

    3/8 X 1/4 Inch Brass Hose Coupling W/ Spring Replaces E8595

    AUTOMANN USA

    $8.27
    3/8 X 1/4 Inch Hose Coupling W/ Spring* High Quality Hose Coupling* Fitting Type: Air Brake Hose* Connection: Hose Inner Diameter To Male NPT* Spring Attached To Male Connector End* Made Of Brass*...
    09-05170157
    SKU:
    09-05170157
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $8.27
    Qty in Cart: 0
    Price:
    $8.27
    Subtotal:
  • 1/2 X 3/8 Inch Brass Hose Coupling W/ Spring Replaces E8598

    1/2 X 3/8 Inch Brass Hose Coupling W/ Spring Replaces E8598

    AUTOMANN USA

    $11.93
    1/2 X 3/8 Inch Hose Coupling W/ Spring* High Quality Hose Coupling* Fitting Type: Air Brake Hose* Connection: Hose Inner Diameter To Male NPT* Spring Attached To Male Connector End* Made Of Brass*...
    09-05170160
    SKU:
    09-05170160
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Make:
    Universal Items
    $11.93
    Qty in Cart: 0
    Price:
    $11.93
    Subtotal:
  • 3/8 X 3/8 Inch Brass Coupling Body Replaces E8586

    3/8 X 3/8 Inch Brass Coupling Body Replaces E8586

    AUTOMANN USA

    $4.48
    3/8 X 3/8 Inch Coupling Body* High Quality Hose Coupling* Fitting Type: Air Brake Hose* Connection: Hose Inner Diameter To Male NPT* Made Of Brass* 3/8 Inch Inner Diameter Hose End* 3/8 Inch Outer...
    09-05170136
    SKU:
    09-05170136
    Product Type:
    Air, Electrical, & Safety
    Diameter Options:
    3/8 Inch
    Material Options:
    Brass
    Make:
    Universal Items
    $4.48
    Qty in Cart: 0
    Price:
    $4.48
    Subtotal:
  • 1/2 X 3/8 Inch Brass Coupling Body Replaces E8588

    1/2 X 3/8 Inch Brass Coupling Body Replaces E8588

    AUTOMANN USA

    $8.47
    1/2 X 3/8 Inch Coupling Body* High Quality Hose Coupling* Fitting Type: Air Brake Hose* Connection: Hose Inner Diameter To Male NPT* Made Of Brass* 1/2 Inch Inner Diameter Hose End* 3/8 Inch Outer...
    09-05170145
    SKU:
    09-05170145
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Make:
    Universal Items
    $8.47
    Qty in Cart: 0
    Price:
    $8.47
    Subtotal:
  • 3/8 X 1/4 Inch Brass Coupling Body Replaces E8585

    3/8 X 1/4 Inch Brass Coupling Body Replaces E8585

    AUTOMANN USA

    $5.09
    3/8 X 1/4 Inch Coupling Body* High Quality Hose Coupling* Fitting Type: Air Brake Hose* Connection: Hose Inner Diameter To Male NPT* Made Of Brass* 3/8 Inch Inner Diameter Hose End* 1/4 Inch Outer...
    09-05170135
    SKU:
    09-05170135
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $5.09
    Qty in Cart: 0
    Price:
    $5.09
    Subtotal:
  • 1/2 X 1/2 Inch Brass Coupling Body Replaces E8589

    1/2 X 1/2 Inch Brass Coupling Body Replaces E8589

    AUTOMANN USA

    $5.94
    1/2 X 1/2 Inch Coupling Body* High Quality Hose Coupling* Fitting Type: Air Brake Hose* Connection: Hose Inner Diameter To Male NPT* Made Of Brass* 1/2 Inch Inner Diameter Hose End* 1/2 Inch Outer...
    09-05170146
    SKU:
    09-05170146
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Diameter Options:
    1/2 Inch
    Make:
    Universal Items
    $5.94
    Qty in Cart: 0
    Price:
    $5.94
    Subtotal:
  • 5.5 Automatic Slack Adjuster Replaces 40920046, 40020240, ZZ40020240, 539640020240, M808005

    5.5 Automatic Slack Adjuster Replaces 40920046, 40020240, ZZ40020240, 539640020240, M808005

    AFTERMARKET

    $154.99
    5.5 Haldex Self- Setting Type Automatic Slack AdjusterKeep your brakes perfectly calibrated with the 5.5 Automatic Slack Adjuster, a self-setting Haldex slack type adjuster engineered for accuracy...
    09-05170121
    SKU:
    09-05170121
    Product Type:
    Frame & Chassis
    Diameter Options:
    1 1/2 Inch
    Make:
    Universal Items
    $154.99
    Qty in Cart: 0
    Price:
    $154.99
    Subtotal:
  • 15.00 X 4.00 Inch 8 Hole Brake Drum Replaces 107902, 3741X, 3741, 2009641C1, 65543, 65543B, 65543F

    15.00 X 4.00 Inch 8 Hole Brake Drum Replaces 107902, 3741X, 3741, 2009641C1, 65543, 65543B, 65543F

    AFTERMARKET

    $379.99
    8 Hole 15.00 X 4.00 Inch Inch Brake Drum* High Quality Brake Drum* Balanced To 20 Inch - Oz* (8) 1 Inch Bolt Holes* For Brake Surface Diameter 15 Inch X 4 Inch* 9.04 Inch Overall Width* 4.75 Inch...
    09-05170122
    SKU:
    09-05170122
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $379.99
    Qty in Cart: 0
    Price:
    $379.99
    Subtotal:
  • 3/8 X 1/2 Inch Brass Coupling Body Replaces E8587

    3/8 X 1/2 Inch Brass Coupling Body Replaces E8587

    AUTOMANN USA

    $4.80
    3/8 X 1/2 Inch Coupling Body* High Quality Hose Coupling* Fitting Type: Air Brake Hose* Connection: Hose Inner Diameter To Male NPT* Made Of Brass* 3/8 Inch Inner Diameter Hose End* 1/2 Inch Outer...
    09-05170134
    SKU:
    09-05170134
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $4.80
    Qty in Cart: 0
    Price:
    $4.80
    Subtotal:
  • Holland 5th Wheel Rebuild Kit Replaces RK17AL

    Holland 5th Wheel Rebuild Kit Replaces RK17AL

    AFTERMARKET

    $1,057.99
    5th Wheel Rebuild KitRestore the performance and reliability of your fifth wheel with the Holland 5th Wheel Rebuild Kit Replaces RK17AL, designed for Holland Neway FW17 5th wheels. This high-quality...
    09-0511071
    SKU:
    09-0511071
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $1,057.99
    Qty in Cart: 0
    Price:
    $1,057.99
    Subtotal:
  • Black 4 Trumpet Mini Train Horn

    Black 4 Trumpet Mini Train Horn

    UNITED PACIFIC

    $93.99
    4 Trumpet Mini Train Horn- BlackMake safety and attention a priority with the Black 4 Trumpet Mini Train Horn, designed for truckers and drivers who need superior sound. The kit includes four durable...
    09-0513137
    SKU:
    09-0513137
    Color:
    Black
    Product Type:
    Frame & Chassis
    Height Options:
    6 Inch
    Length Options:
    11 3/4 Inch
    Rating:
    150 PSI
    Width Options:
    5 1/4 Inch
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $93.99
    Qty in Cart: 0
    Price:
    $93.99
    Subtotal:
  • Wear Ring Kit Replaces KITRING3000

    Wear Ring Kit Replaces KITRING3000

    AFTERMARKET

    $271.99
    3000 Series Wear Ring KitKeep your hydraulic systems in top condition with the Wear Ring Kit Replaces KITRING3000, designed for precise performance and extended durability. Included hardware ensures...
    09-05110030
    SKU:
    09-05110030
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $271.99
    Qty in Cart: 0
    Price:
    $271.99
    Subtotal:
  • 21 Inch Stainless Steel Blank Top Flap Accent Trim

    21 Inch Stainless Steel Blank Top Flap Accent Trim

    ROADWORKS

    $37.33
    21 Inch Blank Top Flap Accent TrimAchieve durable protection and a refined look with the 21 Inch Stainless Steel Blank Top Flap Accent Trim. Crafted from premium stainless steel and measuring 21...
    09-05070622
    SKU:
    09-05070622
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Product Type:
    Mud Flaps
    Width Options:
    21 Inch
    Make:
    Universal Items
    $37.33
    Qty in Cart: 0
    Price:
    $37.33
    Subtotal:
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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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