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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
  • Front Fender With Medium Sidewall- Driver Side For Peterbilt 379

    Front Fender With Medium Sidewall- Driver Side For Peterbilt 379

    BAD ASS CUSTOM TRUCK PARTS

    $438.99
    Driver Side Front Fender With Medium SidewallThe Front Fender with Medium Sidewall for Peterbilt 379 is engineered to offer maximum durability and customization. Made from fiberglass, this...
    01-12700009701
    SKU:
    01-12700009701
    Location:
    Made In USA
    Finish Options:
    Paintable
    Material Options:
    Fiberglass
    Product Type:
    Hood Parts & Acc.
    Position:
    Driver Side
    Make:
    Peterbilt
    $438.99
    Qty in Cart: 0
    Price:
    $438.99
    Subtotal:
  • 24 Inch Chrome Plated Aluminum Step Plate W/ Logo Cutout Rubber Insert For Peterbilt

    24 Inch Chrome Plated Aluminum Step Plate W/ Logo Cutout Rubber Insert For Peterbilt

    LIFETIME NUT COVERS

    $697.99
    24 Inch Step Plate With Logo Cutout Rubber InsertAdd a bold, professional finish to your ride with this high-quality 24 Inch Chrome Step Plate for Peterbilt models. The billet aluminum body shines...
    01-050500008
    SKU:
    01-050500008
    Finish Options:
    Chrome-Plated
    Location:
    Made In USA
    Length Options:
    24 Inch
    Material Options:
    Billet Aluminum
    Height Options:
    6 Inch
    Make:
    Peterbilt
    Product Type:
    Frame & Chassis
    $697.99
    Qty in Cart: 0
    Price:
    $697.99
    Subtotal:
  • 4 Bay J-Lock Load Lock Rack With Tray- Vertical Mount

    4 Bay J-Lock Load Lock Rack With Tray- Vertical Mount

    JONES MFG

    $129.99
    Vertical Mount 4 Bay J-Lock Load Lock Rack With TraySecure and organize your load bars with the 4 Bay J-Lock Load Lock Rack with Tray - Vertical Mount. Crafted from powder-coated aluminum for lasting...
    09-020200095
    SKU:
    09-020200095
    Finish Options:
    Black Powder Coat
    Material Options:
    Aluminum
    Product Type:
    Cargo Control
    Make:
    Universal Items
    $129.99
    Qty in Cart: 0
    Price:
    $129.99
    Subtotal:
  • Hub Cap Oiler Center Fill Plug Replaces E04000, E04000V, 9105S

    Hub Cap Oiler Center Fill Plug Replaces E04000, E04000V, 9105S

    AUTOMANN USA

    $1.31
    1.62 Inch Oil Hub Cap Center Fill PlugKeep your wheel hubs sealed and protected with this Oil Hub Cap Center Fill Plug. Crafted from high-quality materials, this plug is designed for long-lasting...
    29-20200057
    SKU:
    29-20200057
    Diameter Options:
    1 1/2 Inch
    Product Type:
    Wheels
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $1.31
    Qty in Cart: 0
    Price:
    $1.31
    Subtotal:
  • Belt Pulley Replaces 49112, 89102DAY For Peterbilt & Volvo

    Belt Pulley Replaces 49112, 89102DAY For Peterbilt & Volvo

    AFTERMARKET

    $59.99
    2.913 OD X 1.826 Inch Belt PulleyEnhance your truck's belt system with this precision-engineered belt pulley, replacing 49112 and 89102DAY for Peterbilt and Volvo. Its 1.826-inch width, 0.669-inch...
    29-07060183
    SKU:
    29-07060183
    Width Options:
    1 3/4 Inch
    Product Type:
    Engine Parts
    Make:
    Volvo
    Make:
    Peterbilt
    $59.99
    Qty in Cart: 0
    Price:
    $59.99
    Subtotal:
  • MV3 Type Dash Control Module Replaces 065379, 065159, 800517

    MV3 Type Dash Control Module Replaces 065379, 065159, 800517

    AFTERMARKET

    $122.99
    MV3 Type Dash Control ModuleEnsure your heavy-duty truck's brakes respond exactly when needed with this MV3 type dash control module, replacing 065379, 065159, and 800517. Featuring five 1/4-inch NPT...
    29-150100075
    SKU:
    29-150100075
    Product Type:
    Interior
    Width Options:
    1 1/2 Inch
    Length Options:
    5 3/4 Inch
    Make:
    Universal Items
    $122.99
    Qty in Cart: 0
    Price:
    $122.99
    Subtotal:
  • Conservator Steer Axle Seal Replaces 35058, MER0136, MER0236

    Conservator Steer Axle Seal Replaces 35058, MER0136, MER0236

    AFTERMARKET

    $32.90
    Steer Axle Conservator SealProtect your steer axle and maintain smooth steering with the Conservator Steer Axle Seal, a high-quality replacement for 35058, MER0136, and MER0236. Featuring an HNBR...
    29-20200060
    SKU:
    29-20200060
    Diameter Options:
    3 1/2 Inch
    Product Type:
    Wheels
    Width Options:
    9 1/4 Inch
    Make:
    Universal Items
    $32.90
    Qty in Cart: 0
    Price:
    $32.90
    Subtotal:
  • Black Poly Molded Coolant Hose Replaces 2869165

    Black Poly Molded Coolant Hose Replaces 2869165

    AFTERMARKET

    $65.99
    1 X 28 Inch Molded Coolant Hose For Cummins ISX EngineExtend the life of your Cummins ISX engine with this durable black molded coolant hose, a direct replacement for 2869165. The molded silicone...
    29-070200032
    SKU:
    29-070200032
    Diameter Options:
    1 Inch
    Style Options:
    Cummins
    Color:
    Black
    Length Options:
    28 Inch
    Product Type:
    Engine Parts
    Material Options:
    Silicone
    Make:
    Universal Items
    $65.99
    Qty in Cart: 0
    Price:
    $65.99
    Subtotal:
  • Pad Mount Alternator Replaces 8600314

    Pad Mount Alternator Replaces 8600314

    AFTERMARKET

    $498.99
    28SI Type AlternatorEquip your truck with this reliable pad mount alternator, engineered for replacement of 8600314. With a 28 SI rating and 200-amp output, it delivers consistent electricity to all...
    29-07090003
    SKU:
    29-07090003
    Product Type:
    Engine Parts
    Style Options:
    Pad Mount
    Make:
    Universal Items
    $498.99
    Qty in Cart: 0
    Price:
    $498.99
    Subtotal:
  • Air Electric Paddle Toggle Valve Replaces K2953621, 401157, 918309, DV32001A, 032225 For Kenworth, Peterbilt & Volvo

    Air Electric Paddle Toggle Valve Replaces K2953621, 401157, 918309, DV32001A, 032225 For Kenworth, Peterbilt & Volvo

    AUTOMANN USA

    $34.61
    Air Electric Paddle Toggle ValveKeep your truck's air system functioning at peak performance with the Air Electric Paddle Toggle Valve. Compatible with Kenworth, Peterbilt, and Volvo vehicles, this...
    29-16190301
    SKU:
    29-16190301
    Product Type:
    Interior
    Make:
    Kenworth
    Make:
    Peterbilt
    Make:
    Volvo
    $34.61
    Qty in Cart: 0
    Price:
    $34.61
    Subtotal:
  • Air Disc Brake Chamber Replaces SC20D, 5396SC20D

    Air Disc Brake Chamber Replaces SC20D, 5396SC20D

    AFTERMARKET

    $111.99
    Type 20 Air Disc Brake CamberEnsure reliable stopping power for your heavy-duty truck with this high-quality Air Disc Brake Chamber. Engineered as a Type 20 chamber, it features an M16 x 1.5 bolt...
    29-051700042
    SKU:
    29-051700042
    Height Options:
    4 1/2 Inch
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $111.99
    Qty in Cart: 0
    Price:
    $111.99
    Subtotal:
  • 1.937 X 3.937 Inch Red Poly Air Intake Hose For Cummins ISX

    1.937 X 3.937 Inch Red Poly Air Intake Hose For Cummins ISX

    AFTERMARKET

    $41.98
    Hot Side Air Intake Hose 1.937 X 3.937 Inch Replaces 3682842, 4919970, 4952644Keep your Cummins ISX EGR system performing at its best with this premium red poly air intake hose. Constructed from...
    29-07110010
    SKU:
    29-07110010
    Material Options:
    Silicone
    Length Options:
    4 Inch
    Product Type:
    Engine Parts
    Diameter Options:
    2 Inch
    Style Options:
    Cummins
    Make:
    Universal Items
    $41.98
    Qty in Cart: 0
    Price:
    $41.98
    Subtotal:
  • MV3 Type Dash Control Module With 1/4 Inch NPT Ports

    MV3 Type Dash Control Module With 1/4 Inch NPT Ports

    AUTOMANN USA

    $144.99
    Dash Control Module With 1/4 Inch NPT PortsDepend on the MV3 Type Dash Control Module for consistent, accurate air brake operation in your commercial truck. Featuring five 1/4-inch NPT ports, it...
    29-051700034
    SKU:
    29-051700034
    Product Type:
    Interior
    Make:
    Universal Items
    $144.99
    Qty in Cart: 0
    Price:
    $144.99
    Subtotal:
  • Poly Molded Coolant Hose Replaces 4298695 For Peterbilt & Volvo

    Poly Molded Coolant Hose Replaces 4298695 For Peterbilt & Volvo

    AFTERMARKET

    $31.87
    1 ID X 8 Inch Molded Coolant Hose For Cummins EngineKeep your fleet running strong with this premium poly molded coolant hose, compatible with Peterbilt and Volvo trucks. Replacing 4298695, the...
    29-070200031
    SKU:
    29-070200031
    Color:
    Black
    Product Type:
    Engine Parts
    Diameter Options:
    1 Inch
    Style Options:
    Cummins
    Material Options:
    Silicone
    Length Options:
    8 Inch
    Make:
    Volvo
    Make:
    Peterbilt
    $31.87
    Qty in Cart: 0
    Price:
    $31.87
    Subtotal:
  • Dual Circuit Foot Valve Replaces 065313, 800583, 65313X 20QE3296M, R955800629N

    Dual Circuit Foot Valve Replaces 065313, 800583, 65313X 20QE3296M, R955800629N

    AUTOMANN USA

    $96.99
    E8P Type Dual Circuit Foot ValveThe Dual Circuit Foot Valve is a professional-grade air brake solution, delivering precise control for E8 dual-circuit systems. With multiple delivery and supply...
    29-051700035
    SKU:
    29-051700035
    Product Type:
    Interior
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $96.99
    Qty in Cart: 0
    Price:
    $96.99
    Subtotal:
  • Low Pressure A/C Switch Replaces 1803836, P93CAA36061 For Kenworth T2000, Peterbilt 359, 378’379

    Low Pressure A/C Switch Replaces 1803836, P93CAA36061 For Kenworth T2000, Peterbilt 359, 378’379

    AFTERMARKET

    $44.44
    Low Pressure A/C Switch- 2 PinDon't risk A/C system failure-install this quality low-pressure A/C switch for Kenworth and Peterbilt trucks. Engineered for precise operation, it features an M10-1.25...
    29-070000041
    SKU:
    29-070000041
    Product Type:
    Interior
    Make:
    Kenworth
    Make:
    Peterbilt
    $44.44
    Qty in Cart: 0
    Price:
    $44.44
    Subtotal:
  • On Sale
    Limited Quantity Available
    Pressure Protection Valve Replaces A6814290844, 223-365

    Pressure Protection Valve Replaces A6814290844, 223-365

    AFTERMARKET

    Now: $28.73
    Was: $41.04
    3/8 Inch NPT Pressure Protection ValveSafeguard your truck's pneumatic system with this precision-engineered Pressure Protection Valve, providing reliable pressure control at 65 PSI opening and 55...
    29-05040001
    SKU:
    29-05040001
    Rating:
    65 PSI
    Product Type:
    Exhaust
    Make:
    Universal Items
    Ready To Ship:
    Yes
    Now: $28.73
    Was: $41.04
    Qty in Cart: 0
    Price:
    Now: $28.73
    Was: $41.04
    Subtotal:
  • Camshaft Repair Kit Replaces 78500, 127808, E5501, K499, R615015, 43-7069 For Kenworth, Peterbilt & Volvo

    Camshaft Repair Kit Replaces 78500, 127808, E5501, K499, R615015, 43-7069 For Kenworth, Peterbilt & Volvo

    AFTERMARKET

    $17.60
    Camshaft Repair KitRestore your camshaft assembly to factory precision with this reliable Camshaft Repair Kit, compatible with Kenworth, Peterbilt, and Volvo trucks. Built for Eaton 15 Inch Reduced...
    29-051700041
    SKU:
    29-051700041
    Product Type:
    Engine Parts
    Make:
    Kenworth
    Make:
    Peterbilt
    Make:
    Volvo
    $17.60
    Qty in Cart: 0
    Price:
    $17.60
    Subtotal:
  • Coalescing Dryer Cartridge Replaces TDAR950068, R950068, 85110799

    Coalescing Dryer Cartridge Replaces TDAR950068, R950068, 85110799

    AUTOMANN USA

    $48.58
    Wabco Type Coalescing Dryer CartridgeKeep your truck's air system running at peak efficiency with this durable Coalescing Dryer Cartridge. Specifically designed for Wabco SS1200, SS1200P, and SS1200...
    29-051700036
    SKU:
    29-051700036
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $48.58
    Qty in Cart: 0
    Price:
    $48.58
    Subtotal:
  • Spring Brake Valve Replaces 51301

    Spring Brake Valve Replaces 51301

    AUTOMANN USA

    $56.99
    TEV Type Spring Brake ValveRely on consistent braking power with this high-performance TEV Type Spring Brake Valve, designed for superior air system control. Featuring two 1/4-inch, one 3/4-inch, and...
    29-051700033
    SKU:
    29-051700033
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $56.99
    Qty in Cart: 0
    Price:
    $56.99
    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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