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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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  • Quantity
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  • FREE SHIPPING OVER $249
    Aluminum Frame Steps 23 Inch W/ 4 Secure Frame Mounting Holes & Width Options

    Aluminum Frame Steps 23 Inch W/ 4 Secure Frame Mounting Holes & Width Options

    ICONIC

    $220.99 - $264.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of TrucksAluminum Frame Steps 12 X 23 Inch W/ 4 Secure Frame Mounting Holes12 X 23 Inch Aluminum Frame Steps W/...
    PPR_301290
    SKU:
    PPR_301290
    Material Options:
    Aluminum
    Location:
    Made In USA
    Height Options:
    23 Inch
    Width Options:
    22 Inch
    Product Type:
    Frame & Chassis
    Width Options:
    16 Inch
    Length Options:
    8 3/4 Inch
    Width Options:
    12 Inch
    Make:
    Universal Items
    $220.99 - $264.99
    Qty in Cart: 0
    Price:
    $220.99 - $264.99
    Subtotal:
  • FREE SHIPPING OVER $219
    18 Gauge Wire Harness W/ 10 Female .18 Inch 4 Pin Bullet Connectors & Prong Spacing Options

    18 Gauge Wire Harness W/ 10 Female .18 Inch 4 Pin Bullet Connectors & Prong Spacing Options

    TRUX ACCESSORIES

    $33.08 - $43.00
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of Trucks18 Gauge Wire Harness W/ 10 Female .18 Inch 4 Pin Bullet Connectors & 4 Inch Spacing For RGB Lighting...
    PPR_301296
    SKU:
    PPR_301296
    Product Type:
    Lighting
    Make:
    Universal Items
    $33.08 - $43.00
    Qty in Cart: 0
    Price:
    $33.08 - $43.00
    Subtotal:
  • Hogebuilt Stainless Steel Fender Mounting Bracket Driver/Passenger Side For Peterbilt W/ Air Trac 22.5 & 24.5 Low Pro Suspension

    Hogebuilt Stainless Steel Fender Mounting Bracket Driver/Passenger Side For Peterbilt W/ Air Trac 22.5 & 24.5 Low Pro Suspension

    HOGEBUILT FENDERS

    $534.99
    Choose Option(s) to see description.Fitment* Fits Peterbilt 330 1995 thru 2005* Fits Peterbilt 335 2005 thru 2010* Fits Peterbilt 337 2011 thru 2023* Fits Peterbilt 352 1972 thru 1980* Fits Peterbilt...
    PPR_301200
    SKU:
    PPR_301200
    Position:
    Driver Side
    Position:
    Passenger Side
    Type Options:
    Triangle Arm Mount
    Material Options:
    Stainless Steel
    Style Options:
    Quarter Fender
    Location:
    Made In USA
    Product Type:
    Rear Fenders
    Make:
    Peterbilt
    $534.99
    Qty in Cart: 0
    Price:
    $534.99
    Subtotal:
  • FREE SHIPPING OVER $249
    8 AWG Primary Copper Wire 6 Ft W/ Color Options

    8 AWG Primary Copper Wire 6 Ft W/ Color Options

    UNITED PACIFIC

    $7.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of Trucks8 AWG Black Primary Copper Wire 6 FtBlack Primary Copper Wire 8 AWG 6 Ft* High Quality Primary Wire*...
    PPR_301285
    SKU:
    PPR_301285
    Product Type:
    Lighting
    Make:
    Universal Items
    $7.99
    Qty in Cart: 0
    Price:
    $7.99
    Subtotal:
  • Aluminum Thread On Caroline Style Gearshift Knob W/ Zinc Die Cast Adapter For 13/15/18 Speed Eaton Fuller Shifter, Matte Black & Embedded LED W/ Color Option

    Aluminum Thread On Caroline Style Gearshift Knob W/ Zinc Die Cast Adapter For 13/15/18 Speed Eaton Fuller Shifter, Matte Black & Embedded LED W/ Color Option

    UNITED PACIFIC

    $78.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of TrucksAluminum Thread On Caroline Style Gearshift Knob Matte W/ Zinc Die Cast Adapter For 13/15/18 Speed...
    PPR_301292
    SKU:
    PPR_301292
    Color:
    Amber
    Color:
    Blue
    Color:
    Red
    Color:
    White
    Product Type:
    Interior
    Color:
    Green
    Type Options:
    Thread On
    Location:
    Made In USA
    Color:
    Purple
    Material Options:
    Aluminum
    Make:
    Universal Items
    $78.99
    Qty in Cart: 0
    Price:
    $78.99
    Subtotal:
  • FREE SHIPPING OVER $249
    3:1 Heat Shrink Tubing Red/Black W/ Size Options 2 Pack

    3:1 Heat Shrink Tubing Red/Black W/ Size Options 2 Pack

    UNITED PACIFIC

    $5.99 - $6.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of Trucks3:1 Heat Shrink Tubing Red/Black 4 X 2/5 Inch 2 Pack2 Pack 3:1 Heat Shrink Tubing Red/Black 4 X 2/5...
    PPR_301281
    SKU:
    PPR_301281
    Product Type:
    Air, Electrical, & Safety
    Length Options:
    4 Inch
    Make:
    Universal Items
    $5.99 - $6.99
    Qty in Cart: 0
    Price:
    $5.99 - $6.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Steel Frame Clips W/ Size & Quantity Options

    Steel Frame Clips W/ Size & Quantity Options

    UNITED PACIFIC

    $4.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of Trucks7 Pack Small Steel Frame Clip 1 1/8 X 7/16 X 1/4 InchSmall Steel Frame Clip 1 1/8 X 7/16 X 1/4 Inch 7...
    PPR_301283
    SKU:
    PPR_301283
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $4.99
    Qty in Cart: 0
    Price:
    $4.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Weather Connector Project Kit W/ Male & Female Connector Housings, 14-16 Gauge Wire Terminals & Quantity/Style Options

    Weather Connector Project Kit W/ Male & Female Connector Housings, 14-16 Gauge Wire Terminals & Quantity/Style Options

    UNITED PACIFIC

    $6.99 - $10.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of TrucksOne 2 Wire Weather Connector Project Kit W/ Male & Female Connector Housings/ 14-16 Gauge Wire...
    PPR_301275
    SKU:
    PPR_301275
    Position:
    Kit Full
    Product Type:
    Air, Electrical, & Safety
    Location:
    Made In USA
    Make:
    Universal Items
    $6.99 - $10.99
    Qty in Cart: 0
    Price:
    $6.99 - $10.99
    Subtotal:
  • FREE SHIPPING OVER $249
    ATC/ATO Type Blade Fuse W/ Color & Amp Options

    ATC/ATO Type Blade Fuse W/ Color & Amp Options

    UNITED PACIFIC

    $1.93
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of TrucksPurple 3 Amp ATC/ATO Type Blade Fuse3 Amp Purple ATC/ATO Type Blade Fuse* High Quality Fuse* ATC/ATO...
    PPR_301277
    SKU:
    PPR_301277
    Color:
    Green
    Color:
    Yellow
    Color:
    Orange
    Rating:
    15.0 Amps
    Rating:
    5.0 Amps
    Location:
    Made In USA
    Rating:
    20.0 Amps
    Color:
    Purple
    Color:
    Blue
    Product Type:
    Air, Electrical, & Safety
    Color:
    Red
    Rating:
    3.0 Amps
    Rating:
    10.0 Amps
    Rating:
    30.0 Amps
    Make:
    Universal Items
    $1.93
    Qty in Cart: 0
    Price:
    $1.93
    Subtotal:
  • Hogebuilt Stainless Steel Single Axle Fender W/ 3 Inch Flange & Length Options

    Hogebuilt Stainless Steel Single Axle Fender W/ 3 Inch Flange & Length Options

    HOGEBUILT FENDERS

    $275.99 - $336.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of TrucksHogebuilt Stainless Steel 48 Inch Single Axle Fender W/ 3 Inch Flange48 Inch Single Axle Fender...
    PPR_301208
    SKU:
    PPR_301208
    Length Options:
    60 Inch
    Style Options:
    Full Fender
    Finish Options:
    Polished
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Product Type:
    Rear Fenders
    Length Options:
    48 Inch
    Make:
    Universal Items
    $275.99 - $336.99
    Qty in Cart: 0
    Price:
    $275.99 - $336.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Primary Copper Wire 20 AWG 30 Ft Length W/ Color Options

    Primary Copper Wire 20 AWG 30 Ft Length W/ Color Options

    UNITED PACIFIC

    $7.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of TrucksBlack Primary Copper Wire 20 AWG 30 Ft LengthBlack 20 AWG Primary Copper Wire 30 Ft Length* High...
    PPR_301273
    SKU:
    PPR_301273
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $7.99
    Qty in Cart: 0
    Price:
    $7.99
    Subtotal:
  • Hogebuilt Mirror Shine Stainless Steel Flap Weight Upper/Lower Options

    Hogebuilt Mirror Shine Stainless Steel Flap Weight Upper/Lower Options

    HOGEBUILT FENDERS

    $97.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of TrucksHogebuilt Mirror Shine Stainless Steel Bottom Flap WeightMirror Shine Stainless Steel Bottom Flap...
    PPR_301199
    SKU:
    PPR_301199
    Location:
    Made In USA
    Finish Options:
    Polished
    Position:
    Lower
    Position:
    Upper
    Product Type:
    Mud Flaps
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    $97.99
    Qty in Cart: 0
    Price:
    $97.99
    Subtotal:
  • Hogebuilt Driver & Passenger Side Half Tandem Fender Mounting Bracket For Peterbilt Low Air & Kenworth AG400L Suspension

    Hogebuilt Driver & Passenger Side Half Tandem Fender Mounting Bracket For Peterbilt Low Air & Kenworth AG400L Suspension

    HOGEBUILT FENDERS

    $924.99
    Half Tandem Fender Mounting Bracket Driver & Passenger Side By Hogebuilt* High Quality Fender Mounting Bracket* Designed To Mount Down Low Half Tandem Fenders* Includes:  - Driver Side Mounting...
    29-1110040
    SKU:
    29-1110040
    Product Type:
    Rear Fenders
    Location:
    Made In USA
    Make:
    Kenworth
    Make:
    Peterbilt
    $924.99
    Qty in Cart: 0
    Price:
    $924.99
    Subtotal:
  • Steel Leaf Spring Suspension 27 Inch Axis 1 & 32 Inch Axis 2 Length

    Steel Leaf Spring Suspension 27 Inch Axis 1 & 32 Inch Axis 2 Length

    DAYTON / DORMAN

    $1,514.99
    Steel Leaf Spring Suspension W/ 5 Leaves & 2 Threaded M32 X 4 Inch Diameter Bushing Pins* High Quality Leaf Spring Suspension* Made Of Steel* Full Taper Front Axle Type* Includes:  - (2) Up Turned...
    29-05090259
    SKU:
    29-05090259
    Material Options:
    Steel
    Product Type:
    Frame & Chassis
    Location:
    Made In USA
    Make:
    Universal Items
    $1,514.99
    Qty in Cart: 0
    Price:
    $1,514.99
    Subtotal:
  • Filter-Equipped Aluminum Filter Cartridge W/ Hex Thread & Rubber Vent Plug For Steer Axle

    Filter-Equipped Aluminum Filter Cartridge W/ Hex Thread & Rubber Vent Plug For Steer Axle

    THE HUB CORPORATION

    $41.99
    Filter Cartridge Aluminum W/ Multistage Magnetic Oil FilterImprove your steer axle maintenance with thisFilter Equipped Aluminum Filter Cartridge with Hex Thread & Rubber Vent Plug. Designed to...
    09-20200618
    SKU:
    09-20200618
    Product Type:
    Wheels
    Make:
    Universal Items
    $41.99
    Qty in Cart: 0
    Price:
    $41.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Chrome Plated Warhead Design Nut Cover Push On 33MM Across Flat

    Chrome Plated Warhead Design Nut Cover Push On 33MM Across Flat

    GRAND GENERAL

    $28.99
    Push On Nut Cover Chrome Plated Warhead Design 33MM Across Flat* High Quality Nut Cover* Made Of Plastic* Chrome Plated Finish* Warhead Design* Dimensions:  - 4-3/16 Inch Height  - 33 MM Across Flat*...
    09-20060037
    SKU:
    09-20060037
    Product Type:
    Wheels
    Material Options:
    Plastic/Poly
    Finish Options:
    Chrome-Plated
    Type Options:
    Push On
    Size Options:
    33 mm
    Style Options:
    Warhead
    Height Options:
    4 Inch
    Make:
    Universal Items
    $28.99
    Qty in Cart: 0
    Price:
    $28.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Stainless Steel Standard Front Hub Cap W/ 7/16 Lip

    Stainless Steel Standard Front Hub Cap W/ 7/16 Lip

    GRAND GENERAL

    $13.89
    Standard Front Hub Cap Stainless Steel W/ 7/16 Lip* High Quality Hub Cap* Made Of Stainless Steel* Fits Most 20, 22.5, And 24.5 Inch Wheels With 8-23/32 Inch Diameter Center Hole* Includes:  - (1)...
    09-2003165
    SKU:
    09-2003165
    Material Options:
    Stainless Steel
    Product Type:
    Wheels
    Width Options:
    2 Inch
    Make:
    Universal Items
    $13.89
    Qty in Cart: 0
    Price:
    $13.89
    Subtotal:
  • Filter-Equipped Starter Kit W/ Filler Cartridge Replacement & Hex Thread Socket Tool

    Filter-Equipped Starter Kit W/ Filler Cartridge Replacement & Hex Thread Socket Tool

    THE HUB CORPORATION

    $228.99
    Starter Kit W/ Oil Bath Steer Hub Caps & 4 Spare Rubber Vent PlugsMake steer axle maintenance easier with thisFilter Equipped Starter Kit with Filler Cartridge Replacement and Hex Thread Socket Tool...
    09-20200620
    SKU:
    09-20200620
    Product Type:
    Wheels
    Make:
    Universal Items
    $228.99
    Qty in Cart: 0
    Price:
    $228.99
    Subtotal:
  • Filter-Equipped Hub Cap Grease Xtractor Design W/ 6 Bolt Holes, 6.25 Inch Flange Outer Diameter Replaces SKF 1643, 1743, 1843 For Trailer/TN Tapered Spindle Axle

    Filter-Equipped Hub Cap Grease Xtractor Design W/ 6 Bolt Holes, 6.25 Inch Flange Outer Diameter Replaces SKF 1643, 1743, 1843 For Trailer/TN Tapered Spindle Axle

    THE HUB CORPORATION

    $72.99
    Hub Cap Oil Bath Xtractor Design W/ 6 Bolt Holes Fits Trailer/TN Tapered Spindle AxleKeep your trailer axle hubs properly protected with thisFilter Equipped Hub Cap with Grease Xtractor Design,...
    09-20200616
    SKU:
    09-20200616
    Product Type:
    Wheels
    Make:
    Universal Items
    $72.99
    Qty in Cart: 0
    Price:
    $72.99
    Subtotal:
  • FREE SHIPPING OVER $249
    10 Pack 8 AWG Red Crimp & Heat Shrink Seal Butt Connector

    10 Pack 8 AWG Red Crimp & Heat Shrink Seal Butt Connector

    UNITED PACIFIC

    $31.99
    8 AWG Red Crimp & Heat Shrink Seal Butt Connector 10 Pack* High Quality Butt Connector* Crimp And Heat Shrink* 8 AWG* Red* Sold As Pack (10)* Warranty On Butt Connectors Against Defects In...
    09-16030549
    SKU:
    09-16030549
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $31.99
    Qty in Cart: 0
    Price:
    $31.99
    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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