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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
  • Bostrom Truck Seat 900/700 Suspension Hardware Kit

    Bostrom Truck Seat 900/700 Suspension Hardware Kit

    BOSTROM TRUCK SEATS

    $36.39
    Replacement Suspension Hardware Kit for Bostrom 900/700 SeatThis suspension hardware kit fits Bostrom 700 and 900 series seats. The kit includes brackets, pins, bushings, and fasteners for seat...
    6222076001
    SKU:
    6222076001
    Product Type:
    Seats
    Position:
    Kit Full
    Make:
    Universal Items
    $36.39
    Qty in Cart: 0
    Price:
    $36.39
    Subtotal:
  • 1/2 Inch Brass Pipe Coupling

    1/2 Inch Brass Pipe Coupling

    PARTS DISTRIBUTING

    $6.51
    Replacement 1/2 Inch Hex Nipple Brass Pipe FittingThis durable brass coupling creates secure, leak-free connections in 1/2 inch pipes. It handles vibration well, works in low to medium pressure...
    BP1038
    SKU:
    BP1038
    Product Type:
    Air, Electrical, & Safety
    Length Options:
    1/2 Inch
    Material Options:
    Brass
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $6.51
    Qty in Cart: 0
    Price:
    $6.51
    Subtotal:
  • ProRide Truck Seat Low Profile Mid Back With Armrest, Black And Gray 2 Tone Ultra Leather

    ProRide Truck Seat Low Profile Mid Back With Armrest, Black And Gray 2 Tone Ultra Leather

    BOSTROM TRUCK SEATS

    $1,390.99
    ProRide Truck Seat Low Profile Mid Back With Armrest* High Quality Seat* Ultraleather* 2 Tone* Black And Gray * Low Profile* Mid Back* With Armrests* Sold Individually* Warranty On Seats Against...
    8230001L77
    SKU:
    8230001L77
    Material Options:
    Ultra Leather
    Style Options:
    Mid Back
    Product Type:
    Seats
    Make:
    Universal Items
    $1,390.99
    Qty in Cart: 0
    Price:
    $1,390.99
    Subtotal:
  • ProRide Truck Seat Standard Base High Back, Driver Swivel With Dual Armrests, Air Lumbar Bellow

    ProRide Truck Seat Standard Base High Back, Driver Swivel With Dual Armrests, Air Lumbar Bellow

    BOSTROM TRUCK SEATS

    $2,064.99
    ProRide Standard Base High Back Truck Seat With Driver Side Swivel* High Quality Seat* Titan Cloth* Black* Standard Base * High Back * With Dual Arm Rest * Air Lumbar * Bellow Suspension Cover *...
    9320029K85
    SKU:
    9320029K85
    Color:
    Black
    Material Options:
    Cloth
    Position:
    Driver Side
    Style Options:
    High Back
    Type Options:
    Standard Base
    Product Type:
    Seats
    Make:
    Universal Items
    $2,064.99
    Qty in Cart: 0
    Price:
    $2,064.99
    Subtotal:
  • Captain Lo Truck Seat With Dual Armrest, Manual Pump, Gray Cloth

    Captain Lo Truck Seat With Dual Armrest, Manual Pump, Gray Cloth

    NATIONAL SEATING

    $1,111.99
    Captain Lo Truck Seat* High Quality Seat* Cloth* Gray * Captain Lo Seat * With Dual Armrests * Manual Pump* Sold Individually* Warranty On Seats Against Defects In Workmanship & Material From Date Of...
    71124361L
    SKU:
    71124361L
    Color:
    Gray
    Material Options:
    Cloth
    Product Type:
    Seats
    Make:
    Universal Items
    $1,111.99
    Qty in Cart: 0
    Price:
    $1,111.99
    Subtotal:
  • Unitized Spindle Nut 3-1/4 Inch-12 Thread 614973, 4494973

    Unitized Spindle Nut 3-1/4 Inch-12 Thread 614973, 4494973

    AFTERMARKET

    $69.99
    Replacement Drive Axle Unitized Spindle Nut* High Quality Unitized Spindle Nut* Dimensions:  - Thread- 3-1/4 Inch-12  - W.A.F.- 4.375 Inch  - Thickness- 1.00 Inch* Made In USA* Sold Individually*...
    29-20200035
    SKU:
    29-20200035
    Product Type:
    Wheels
    Make:
    Universal Items
    $69.99
    Qty in Cart: 0
    Price:
    $69.99
    Subtotal:
  • STP Oil Treatment 15 Oz

    STP Oil Treatment 15 Oz

    AFTERMARKET

    $5.19
    Anti-Wear Agent With Viscosity Improver* High Quality Oil Treatment* 15 Ounce* Helps Protect Against Engine Wear* High Viscosity* Sold Individually* Warranty On Oil Treatments Against Defects In...
    65148
    SKU:
    65148
    Height Options:
    8 Inch
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $5.19
    Qty in Cart: 0
    Price:
    $5.19
    Subtotal:
  • Front Steer Axle Hub Cap HF682K

    Front Steer Axle Hub Cap HF682K

    AFTERMARKET

    $797.99
    Replacement Front Steer Axle Hub Cap* High Quality Steer Hub* Dimensions:  - Overall Height- 7.47 Inch  - Distance Between Cups- 3.02 Inch  - Bolt Circle Diameter- 11.25 Inch* Ball Seat Mount* Hub-...
    29-20200009
    SKU:
    29-20200009
    Product Type:
    Wheels
    Make:
    Universal Items
    $797.99
    Qty in Cart: 0
    Price:
    $797.99
    Subtotal:
  • Black Poly Quarter Fenders - Pair

    Black Poly Quarter Fenders - Pair

    MERRITT

    $142.99
    Black Poly Quarter Fenders* High Quality Quarter Fenders* Made Of Poly* Black* Thick And Tough For Incredible Durability And Long Life* Rust Proof, Chip, Dent And Scuff Resistant* Low Maintenance *...
    50602
    SKU:
    50602
    Location:
    Made In USA
    Color:
    Black
    Material Options:
    Plastic/Poly
    Height Options:
    9 Inch
    Product Type:
    Rear Fenders
    Length Options:
    29 Inch
    Width Options:
    23 Inch
    Make:
    Universal Items
    $142.99
    Qty in Cart: 0
    Price:
    $142.99
    Subtotal:
  • BESTfit Rear Window Trim For Kenworth & Peterbilt

    BESTfit Rear Window Trim For Kenworth & Peterbilt

    BESTFIT TRUCK PARTS

    $147.99
    Kenworth / Peterbilt Rear Window Trim* High Quality Window Trim* For 29-093100 Window Kit* Sold Individually* Warranty On Window Trim Against Defects In Workmanship & Material From Date Of...
    29-152400
    SKU:
    29-152400
    Height Options:
    24 Inch
    Product Type:
    Interior
    Width Options:
    41 Inch
    Make:
    Peterbilt
    Make:
    Universal Items
    Make:
    Kenworth
    Ready To Ship:
    Yes
    $147.99
    Qty in Cart: 0
    Price:
    $147.99
    Subtotal:
  • 1.17 Inch OD Wheel Bearing Cup 2593093, HM212011

    1.17 Inch OD Wheel Bearing Cup 2593093, HM212011

    AUTOMANN USA

    $10.39
    Replacement Wheel Bearing CupThis precision-engineered Wheel Bearing Cup ensures smooth wheel rotation and long-lasting performance.* High Quality Wheel Bearing Cup* Dimensions:  - 1.17 Inch Width  -...
    29-20200047
    SKU:
    29-20200047
    Product Type:
    Wheels
    Width Options:
    1 1/16 Inch
    Shape Options:
    Round
    Make:
    Universal Items
    $10.39
    Qty in Cart: 0
    Price:
    $10.39
    Subtotal:
  • 24 Inch 6 Spoke Wheel Steer

    24 Inch 6 Spoke Wheel Steer

    AFTERMARKET

    $944.99
    Replacement 6 Spoke Wheel Steer* High Quality Spoke Wheel Steer* Includes:   - (1) Outer Race  - (1) Inner Race  - Rim Studs  - Rim Nuts* 24 Inch Diameter* 6-Spoke Wheel* Made In USA* Sold...
    29-20200044
    SKU:
    29-20200044
    Product Type:
    Wheels
    Diameter Options:
    24 Inch
    Make:
    Universal Items
    $944.99
    Qty in Cart: 0
    Price:
    $944.99
    Subtotal:
  • Unitized Spindle Nut 1-1/2 Inch-12 Thread 614836, 4484836 For Meritor, International

    Unitized Spindle Nut 1-1/2 Inch-12 Thread 614836, 4484836 For Meritor, International

    AFTERMARKET

    $56.99
    Replacement Steer Axle Unitized Spindle Nut* High Quality Unitized Spindle Nut* Dimensions:  - Thread 1.5 Inch-12  - A/F- 2.50 Inch  - Thickness- 1.031 Inch* Made In USA* Sold Individually* Warranty...
    29-20200034
    SKU:
    29-20200034
    Product Type:
    Wheels
    Make:
    Universal Items
    $56.99
    Qty in Cart: 0
    Price:
    $56.99
    Subtotal:
  • Unitized Spindle Nut 1-1/2 Inch-18 Thread 448-4837, 614837 For Eaton, Ford, Meritor

    Unitized Spindle Nut 1-1/2 Inch-18 Thread 448-4837, 614837 For Eaton, Ford, Meritor

    AFTERMARKET

    $56.99
    Replacement Steer Axle Unitized Spindle Nut* High Quality Unitized Spindle Nut* Dimensions:  - Thread 1.5 Inch-18  - A/F- 2.50 Inch  - Thickness- 0.953 Inch* Made In USA* Sold Individually* Warranty...
    29-20200033
    SKU:
    29-20200033
    Product Type:
    Wheels
    Make:
    Universal Items
    $56.99
    Qty in Cart: 0
    Price:
    $56.99
    Subtotal:
  • 10-Stud Mount Front Wheel Hub Sub-Assembly 2530, HF805K

    10-Stud Mount Front Wheel Hub Sub-Assembly 2530, HF805K

    AFTERMARKET

    $575.99
    Mount Front Hub Sub-Assembly 11,000 lbs Capacity* High Quality Wheel Hub* Dimensions:  - Overall Height- 7.09 Inch  - Distance Between Cups- 3.03 Inch  - Bolt Circle Diameter- 11.25 Inch  - Pilot- 8...
    29-20200008
    SKU:
    29-20200008
    Product Type:
    Wheels
    Make:
    Universal Items
    $575.99
    Qty in Cart: 0
    Price:
    $575.99
    Subtotal:
  • 3.875 Inch OD Drive Axle Wheel Seal 1534569,1534569, 370023A

    3.875 Inch OD Drive Axle Wheel Seal 1534569,1534569, 370023A

    AFTERMARKET

    $89.99
    Drive Axle Oil Bath Wheel Seal* High Quality Scotseal* Dimensions:  - 3.875 Inch Shaft Diameter  - 5.696 Inch O.D.  - 0.938 Inch Width* Drive Axle* Made In USA* Sold Individually* Warranty On...
    29-20200031
    SKU:
    29-20200031
    Product Type:
    Frame & Chassis
    Diameter Options:
    5 1/2 Inch
    Shape Options:
    Round
    Make:
    Universal Items
    $89.99
    Qty in Cart: 0
    Price:
    $89.99
    Subtotal:
  • Turnpike Truck Trim Sanded Drive Hub Cover with Mounting Hardware For Dana Spicer Type Hubs

    Turnpike Truck Trim Sanded Drive Hub Cover with Mounting Hardware For Dana Spicer Type Hubs

    TURNPIKE TRUCK TRIM

    $122.99
    Drive Axle Hub CoverThese hub covers are built to last using high-quality stainless steel that fights rust and corrosion better than chrome. Perfect for daily driving in all weather conditions. Sold...
    29-2003025
    SKU:
    29-2003025
    Diameter Options:
    12 Inch
    Product Type:
    Wheels
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $122.99
    Qty in Cart: 0
    Price:
    $122.99
    Subtotal:
  • Turnpike Truck Trim 2 Inch 304 SS Deep Drive Axle Cover For Dana Spicer Hub

    Turnpike Truck Trim 2 Inch 304 SS Deep Drive Axle Cover For Dana Spicer Hub

    TURNPIKE TRUCK TRIM

    $102.99
    2 Inch Deep Drive Axle CoverNeed premium Dana Spicer hub covers? These polished 304 stainless covers feature a 2-inch depth perfect for axle protection and appearance. The mirror-like finish stands...
    29-2003005
    SKU:
    29-2003005
    Material Options:
    Stainless Steel
    Width Options:
    2 Inch
    Product Type:
    Wheels
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $102.99
    Qty in Cart: 0
    Price:
    $102.99
    Subtotal:
  • On Sale
    Limited Quantity Available
    Chrome Plastic New Cat Engine Display Trim For Kenworth & Peterbilt

    Chrome Plastic New Cat Engine Display Trim For Kenworth & Peterbilt

    GRAND GENERAL

    Now: $9.65
    Was: $13.78
    Replacement Kenworth & Peterbilt New Cat Engine Display Trim* High Quality Display Trim* Chrome-Plated Plastic * For New CAT Engine * Sold Individually* Warranty On Display Trims Against Defects In...
    29-1504086
    SKU:
    29-1504086
    Finish Options:
    Chrome-Plated
    Material Options:
    Plastic/Poly
    Product Type:
    Interior
    Make:
    Peterbilt
    Make:
    Kenworth
    Ready To Ship:
    Yes
    Style Options:
    Caterpillar
    Now: $9.65
    Was: $13.78
    Qty in Cart: 0
    Price:
    Now: $9.65
    Was: $13.78
    Subtotal:
  • Oil Pump 23527448 For Series 60 Detroit Diesel 14.0L

    Oil Pump 23527448 For Series 60 Detroit Diesel 14.0L

    AFTERMARKET

    $754.99
    Replacement Detroit Diesel Oil Pump* High Quality Oil Pump* Made In USA* Sold Individually* Warranty On Oil Pumps Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...
    29-07200002
    SKU:
    29-07200002
    Product Type:
    Engine Parts
    Make:
    Universal Items
    Style Options:
    Detroit
    $754.99
    Qty in Cart: 0
    Price:
    $754.99
    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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