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Chrome Rush countdown – 14% off semi truck parts and chrome accessories at 4 State Trucks
Chrome Rush countdown – 14% off semi truck parts and chrome accessories at 4 State Trucks

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
  • 1/2 Inch Barb X 3/4 Inch Pipe Brass Hose Fitting Replaces 10508B112, 125HBL812

    1/2 Inch Barb X 3/4 Inch Pipe Brass Hose Fitting Replaces 10508B112, 125HBL812

    AUTOMANN USA

    $5.68
    1/2 Inch Barb X 3/4 Inch Pipe Hose Fitting* High Quality Hose Fitting* Hose Barb To Male NPT Connection* Use With 1/2" Push-On Hose* Made Of Brass* Barb Hose End: 1/2 Inch Inner Diameter* Male NPT...
    09-05040103
    SKU:
    09-05040103
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Make:
    Universal Items
    $5.68
    Qty in Cart: 0
    Price:
    $5.68
    Subtotal:
  • 5/8 Inch Barb X 3/8 Inch Pipe Brass Hose Fitting Replaces 10510B106, 125HBL106

    5/8 Inch Barb X 3/8 Inch Pipe Brass Hose Fitting Replaces 10510B106, 125HBL106

    AUTOMANN USA

    $2.97
    5/8 Inch Barb X 3/8 Inch Pipe Hose Fitting* High Quality Hose Fitting* Hose Barb To Male NPT Connection* Use With 5/8" Push-On Hose, 09-02500149* Made Of Brass* Barb Hose End: 5/8 Inch Inner...
    09-05040076
    SKU:
    09-05040076
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $2.97
    Qty in Cart: 0
    Price:
    $2.97
    Subtotal:
  • 5/8 Inch Barb X 1/2 Inch Pipe Brass Hose Fitting Replaces 125HBL108, 10510B108

    5/8 Inch Barb X 1/2 Inch Pipe Brass Hose Fitting Replaces 125HBL108, 10510B108

    AUTOMANN USA

    $4.12
    5/8 Inch Barb X 1/2 Inch Pipe Hose Fitting* High Quality Hose Fitting* Hose Barb To Male NPT Connection* Use With 5/8" Push-On Hose, 09-02500149* Made Of Brass* Barb Hose End: 5/8 Inch Inner...
    09-05040075
    SKU:
    09-05040075
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $4.12
    Qty in Cart: 0
    Price:
    $4.12
    Subtotal:
  • 1/2 Inch Barb X 1/2 Inch Pipe Brass Hose Fitting Replaces 10508B108, 125HBL88

    1/2 Inch Barb X 1/2 Inch Pipe Brass Hose Fitting Replaces 10508B108, 125HBL88

    AUTOMANN USA

    $3.81
    1/2 Inch Barb X 1/2 Inch Pipe Hose Fitting* High Quality Hose Fitting* Hose Barb To Male NPT Connection* Use With 1/2" Push-On Hose* Made Of Brass* Barb Hose End: 1/2 Inch Inner Diameter* Male NPT...
    09-05040099
    SKU:
    09-05040099
    Diameter Options:
    1/2 Inch
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Make:
    Universal Items
    $3.81
    Qty in Cart: 0
    Price:
    $3.81
    Subtotal:
  • 3/4 Inch Barb X 3/4 Inch Pipe Brass Hose Fitting Replaces 10512B112, 125HBL1212

    3/4 Inch Barb X 3/4 Inch Pipe Brass Hose Fitting Replaces 10512B112, 125HBL1212

    AUTOMANN USA

    $5.50
    3/4 Inch Barb X 3/4 Inch Pipe Hose Fitting* High Quality Hose Fitting* Hose Barb To Male NPT Connection* Use With 3/4" Push-On Hose, 09-02500150* Made Of Brass* Barb Hose End: 3/4 Inch Inner...
    09-05040072
    SKU:
    09-05040072
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $5.50
    Qty in Cart: 0
    Price:
    $5.50
    Subtotal:
  • Brass Male Elbow 3/4 Inch SAE X 3/4 Inch Pipe Replaces 49X12X12, 149F1212

    Brass Male Elbow 3/4 Inch SAE X 3/4 Inch Pipe Replaces 49X12X12, 149F1212

    AUTOMANN USA

    $14.04
    90 Degree Male Elbow 3/4 Inch SAE X 3/4 Inch Pipe* High Quality Male 90 Degree Elbow Valve* SAE 45 Degree Flare Fitting Type* Male SAE Flare Tube To Male NPT Connection* Used In Tube Types: Copper,...
    09-05040074
    SKU:
    09-05040074
    Degree Options:
    45
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $14.04
    Qty in Cart: 0
    Price:
    $14.04
    Subtotal:
  • 3/4 Inch Barb X 1/2 Inch Pipe Brass Hose Fitting Replaces 125HBL128, 10512B108

    3/4 Inch Barb X 1/2 Inch Pipe Brass Hose Fitting Replaces 125HBL128, 10512B108

    AUTOMANN USA

    $4.67
    3/4 Inch Barb X 1/2 Inch Pipe Hose Fitting* High Quality Hose Fitting* Hose Barb To Male NPT Connection* Use With 3/4" Push-On Hose, 09-02500150* Made Of Brass* Barb Hose End: 3/4 Inch Inner...
    09-05040071
    SKU:
    09-05040071
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $4.67
    Qty in Cart: 0
    Price:
    $4.67
    Subtotal:
  • Brass Male Elbow 3/4 Inch SAE X 1/2 Inch Pipe Replaces 49X12, 149F128

    Brass Male Elbow 3/4 Inch SAE X 1/2 Inch Pipe Replaces 49X12, 149F128

    AUTOMANN USA

    $13.59
    90 Degree Male Elbow 3/4 Inch SAE X 1/2 Inch Pipe* High Quality Male 90 Degree Elbow Valve* SAE 45 Degree Flare Fitting Type* Male SAE Flare Tube To Male NPT Connection* Used In Tube Types: Copper,...
    09-05040073
    SKU:
    09-05040073
    Product Type:
    Air, Electrical, & Safety
    Degree Options:
    45
    Material Options:
    Brass
    Make:
    Universal Items
    $13.59
    Qty in Cart: 0
    Price:
    $13.59
    Subtotal:
  • Brass Male Elbow 5/8 Inch SAE X 3/8 Inch Pipe Replaces 49X10X6, 149F106

    Brass Male Elbow 5/8 Inch SAE X 3/8 Inch Pipe Replaces 49X10X6, 149F106

    AUTOMANN USA

    $11.67
    90 Degree Male Elbow 5/8 Inch SAE X 3/8 Inch Pipe* High Quality Male 90 Degree Elbow Valve* SAE 45 Degree Flare Fitting Type* Male SAE Flare Tube To Male NPT Connection* Used In Tube Types: Copper,...
    09-05040068
    SKU:
    09-05040068
    Degree Options:
    45
    Material Options:
    Brass
    Diameter Options:
    5/8 Inch
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $11.67
    Qty in Cart: 0
    Price:
    $11.67
    Subtotal:
  • Brass Male Elbow 5/8 Inch SAE X 3/4 Inch Pipe Replaces 149F1012

    Brass Male Elbow 5/8 Inch SAE X 3/4 Inch Pipe Replaces 149F1012

    AUTOMANN USA

    $10.20
    90 Degree Male Elbow 5/8 Inch SAE X 3/4 Inch Pipe* High Quality Male 90 Degree Elbow Valve* SAE 45 Degree Flare Fitting Type* Male SAE Flare Tube To Male NPT Connection* Used In Tube Types: Copper,...
    09-05040070
    SKU:
    09-05040070
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Degree Options:
    45
    Make:
    Universal Items
    $10.20
    Qty in Cart: 0
    Price:
    $10.20
    Subtotal:
  • Brass Male Elbow 5/8 Inch SAE X 1/2 Inch Pipe Replaces 49X10, 149F108

    Brass Male Elbow 5/8 Inch SAE X 1/2 Inch Pipe Replaces 49X10, 149F108

    AUTOMANN USA

    $8.36
    90 Degree Male Elbow 5/8 Inch SAE X 1/2 Inch Pipe* High Quality Male 90 Degree Elbow Valve* SAE 45 Degree Flare Fitting Type* Male SAE Flare Tube To Male NPT Connection* Used In Tube Types: Copper,...
    09-05040069
    SKU:
    09-05040069
    Degree Options:
    45
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Make:
    Universal Items
    $8.36
    Qty in Cart: 0
    Price:
    $8.36
    Subtotal:
  • Single Check Valve Replaces 227717, 227788, 227871, 20QE1330, KN23000, N13526AJ, 1020012

    Single Check Valve Replaces 227717, 227788, 227871, 20QE1330, KN23000, N13526AJ, 1020012

    AUTOMANN USA

    $13.97
    1/2 X 2.030 Inch Single Check Valve* High Quality Single Check Valve* 1/2 Inch NPT Female Inlet* 1/2 Inch NPT Male Outlet* Made Of Brass* 2.030 Inch Length* Sold Individually* Warranty On Single...
    09-05040045
    SKU:
    09-05040045
    Diameter Options:
    1/2 Inch
    Material Options:
    Brass
    Length Options:
    2 Inch
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $13.97
    Qty in Cart: 0
    Price:
    $13.97
    Subtotal:
  • 5/8 X 1/2 Inch Brass Male Connector Replaces 1368X10, VS68AB108, 116810D, 012055

    5/8 X 1/2 Inch Brass Male Connector Replaces 1368X10, VS68AB108, 116810D, 012055

    AUTOMANN USA

    $7.63
    5/8 X 1/2 Inch Male Connector* High Quality Male Connector* Fitting Type: Compression - Copper Tubing* Connection: Tube To Male NPT* Made Of Brass* Tube End: 5/8 Inch Outer Diameter* Pipe End: 1/2...
    09-05040036
    SKU:
    09-05040036
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Make:
    Universal Items
    $7.63
    Qty in Cart: 0
    Price:
    $7.63
    Subtotal:
  • 3/4 X 3/4 Inch Brass Male Connector Replaces 1368X12X12, VS68AB1212, 116812E

    3/4 X 3/4 Inch Brass Male Connector Replaces 1368X12X12, VS68AB1212, 116812E

    AUTOMANN USA

    $12.59
    3/4 X 3/4 Inch Male Connector* High Quality Male Connector* Fitting Type: Compression - Copper Tubing* Connection: Tube To Male NPT* Made Of Brass* Tube End: 3/4 Inch Outer Diameter* Pipe End: 3/4...
    09-05040038
    SKU:
    09-05040038
    Material Options:
    Brass
    Diameter Options:
    3/4 Inch
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $12.59
    Qty in Cart: 0
    Price:
    $12.59
    Subtotal:
  • 3/8 X 3/8 Inch Brass Swivel Hose Coupling

    3/8 X 3/8 Inch Brass Swivel Hose Coupling

    AUTOMANN USA

    $13.04
    3/8 X 3/8 Inch Swivel Hose Coupling Replaces 33806BY86, 66RBSV634, 1106, 500046This Brass Swivel Hose Coupling, sized 3/8 x 3/8 inch, is designed for dependable use in air brake hose systems and...
    09-05040029
    SKU:
    09-05040029
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Diameter Options:
    3/8 Inch
    Make:
    Universal Items
    $13.04
    Qty in Cart: 0
    Price:
    $13.04
    Subtotal:
  • 3/4 X 1/2 Inch Brass Male Connector Replaces 1368X12, VS68AB128, 116812D, 012061

    3/4 X 1/2 Inch Brass Male Connector Replaces 1368X12, VS68AB128, 116812D, 012061

    AUTOMANN USA

    $12.03
    3/4 X 1/2 Inch Male Connector* High Quality Male Connector* Fitting Type: Compression - Copper Tubing* Connection: Tube To Male NPT* Made Of Brass* Tube End: 3/4 Inch Outer Diameter* Pipe End: 1/2...
    09-05040037
    SKU:
    09-05040037
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Make:
    Universal Items
    $12.03
    Qty in Cart: 0
    Price:
    $12.03
    Subtotal:
  • 5/8 X 3/8 Inch Brass Male Connector Replaces 1368X10X6, VS68AB106, 116810C, 012053

    5/8 X 3/8 Inch Brass Male Connector Replaces 1368X10X6, VS68AB106, 116810C, 012053

    AUTOMANN USA

    $10.57
    5/8 X 3/8 Inch Male Connector* High Quality Male Connector* Fitting Type: Compression - Copper Tubing* Connection: Tube To Male NPT* Made Of Brass* Tube End: 5/8 Inch Outer Diameter* Pipe End: 3/8...
    09-05040035
    SKU:
    09-05040035
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Make:
    Universal Items
    $10.57
    Qty in Cart: 0
    Price:
    $10.57
    Subtotal:
  • 1/2 X 1/2 Inch Brass Swivel Hose Coupling

    1/2 X 1/2 Inch Brass Swivel Hose Coupling

    AUTOMANN USA

    $25.75
    1/2 X 1/2 Inch Swivel Hose Coupling Replaces 33808BY88, 66RBSV878, 11078, S363RB8Ensure secure, leak-free air line connections with the 1/2 x 1/2 Inch Brass Swivel Hose Coupling. This high-quality...
    09-05040031
    SKU:
    09-05040031
    Diameter Options:
    1/2 Inch
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $25.75
    Qty in Cart: 0
    Price:
    $25.75
    Subtotal:
  • 1/2 X 3/8 Inch Brass Swivel Hose Coupling

    1/2 X 3/8 Inch Brass Swivel Hose Coupling

    AUTOMANN USA

    $25.04
    1/2 X 3/8 Inch Swivel Hose Coupling Replaces 33808BY86, 11068, S363RB86* High Quality Swivel Hose Coupling* Fitting Type: Air Brake Hose* Connector Type: Female Swivel Pivot With Adapter* Connection:...
    09-05040030
    SKU:
    09-05040030
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $25.04
    Qty in Cart: 0
    Price:
    $25.04
    Subtotal:
  • 3/8 X 1/4 Inch Brass Swivel Hose Coupling

    3/8 X 1/4 Inch Brass Swivel Hose Coupling

    AUTOMANN USA

    $11.22
    3/8 X 1/4 Inch Swivel Hose Coupling Replaces 33806BY84, 1105, 500039, S363RB64* High Quality Swivel Hose Coupling* Fitting Type: Air Brake Hose* Connector Type: Female Swivel Pivot With Adapter*...
    09-05040028
    SKU:
    09-05040028
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Make:
    Universal Items
    $11.22
    Qty in Cart: 0
    Price:
    $11.22
    Subtotal:
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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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