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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
  • Oxblood Door Panels W/ Passenger Side Lower Window For Peterbilt 359 & 378

    Oxblood Door Panels W/ Passenger Side Lower Window For Peterbilt 359 & 378

    TRUCK-N AWESOME

    $825.00
    Door Panels With Rounded Lower Window On Passenger Door Fits Peterbilt 359, 378Upgrade your Peterbilt's interior with these premium Oxblood Door Panels with Passenger Side Lower Window, designed...
    01-15230209
    SKU:
    01-15230209
    Product Type:
    Interior
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Location:
    Made In USA
    Material Options:
    Vinyl
    Color:
    Red
    Position:
    Passenger Side
    $825.00
    Qty in Cart: 0
    Price:
    $825.00
    Subtotal:
  • FREE SHIPPING
    BESTfit Chrome Exhaust Kit W/ 7-5 LD Elbows & No Top Stack/Spool For Peterbilt 378, 379 & 389 Glider

    BESTfit Chrome Exhaust Kit W/ 7-5 LD Elbows & No Top Stack/Spool For Peterbilt 378, 379 & 389 Glider

    BESTFIT TRUCK PARTS

    $3,044.98
    Chrome Exhaust Kit W/ 7-5 LD Elbows & No Top Stack/Spool By BESTfit Fits Peterbilt 378, 379 & 389 Glider* High Quality Exhaust Kit* Long Drop Design* Includes:  - (2) 7 Inch To 5 Inch 90 Degree...
    01-0897005
    SKU:
    01-0897005
    Product Type:
    Exhaust
    Location:
    Made In USA
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    Material Options:
    Chrome-Plated Steel
    Style Options:
    No Stacks
    Type Options:
    Long Drop Elbows
    Diameter Options:
    7 Inch
    Cab Style:
    Unibilt W/2 Cab Brackets
    $3,044.98
    Qty in Cart: 0
    Price:
    $3,044.98
    Subtotal:
  • FREE SHIPPING
    BESTfit Chrome Exhaust Kit W/ 8-5 LD Elbows & No Top Stack/Spool For Peterbilt 378, 379 & 389 Glider

    BESTfit Chrome Exhaust Kit W/ 8-5 LD Elbows & No Top Stack/Spool For Peterbilt 378, 379 & 389 Glider

    BESTFIT TRUCK PARTS

    $3,184.98
    Chrome Exhaust Kit W/ 8-5 LD Elbows & No Top Stack/Spool By BESTfit Fits Peterbilt 378, 379 & 389 Glider* High Quality Exhaust Kit* Long Drop Design* Includes:  - (2) 8 Inch To 5 Inch 90 Degree...
    01-0898005
    SKU:
    01-0898005
    Ready To Ship:
    Yes
    Location:
    Made In USA
    Make:
    Peterbilt
    Product Type:
    Exhaust
    Diameter Options:
    8 Inch
    Cab Style:
    Unibilt W/2 Cab Brackets
    Material Options:
    Chrome-Plated Steel
    Type Options:
    Long Drop Elbows
    Style Options:
    No Stacks
    $3,184.98
    Qty in Cart: 0
    Price:
    $3,184.98
    Subtotal:
  • FREE SHIPPING
    BESTfit Retro Style Exhaust Kit W/ 6-5 PB Elbows & 55 Spool For Peterbilt 378, 379 & 389 Glider

    BESTfit Retro Style Exhaust Kit W/ 6-5 PB Elbows & 55 Spool For Peterbilt 378, 379 & 389 Glider

    BESTFIT TRUCK PARTS

    $2,543.74
    Retro Style Exhaust Kit W/ 6-5 PB Elbows & 55 Spool By BESTfit Fits Peterbilt 378, 379 & 389 Glider* High Quality Exhaust Kit* Retro OE Style Design* Includes:  - (2) 6 Inch To 5 Inch OE Style Chrome...
    01-0896009
    SKU:
    01-0896009
    Product Type:
    Exhaust
    Location:
    Made In USA
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    Style Options:
    No Stacks
    Type Options:
    OE Style Elbows
    Material Options:
    Chrome-Plated Steel
    Cab Style:
    Unibilt W/2 Cab Brackets
    Diameter Options:
    6 Inch
    $2,543.74
    Qty in Cart: 0
    Price:
    $2,543.74
    Subtotal:
  • BESTfit Chrome Tapered Top Exhaust Elbow W/ 60 Degree Bend & 8 Inch OD - 5 Inch OD For Peterbilt 379

    BESTfit Chrome Tapered Top Exhaust Elbow W/ 60 Degree Bend & 8 Inch OD - 5 Inch OD For Peterbilt 379

    BESTFIT TRUCK PARTS

    $512.99
    Chrome Tapered Top Exhaust Elbow W/ 60 Degree Bend & 8 Inch ID, 5 Inch OD By BESTfit Fits Peterbilt 379* High Quality Exhaust Elbow* Made Of Chrome Plated Steel* 60 Degree Bend* Tapered Top*...
    01-0818530564
    SKU:
    01-0818530564
    Product Type:
    Exhaust
    Diameter Options:
    8 To 5 Inch
    Style Options:
    Tapered
    Degree Options:
    60
    Material Options:
    Steel
    Location:
    Made In USA
    Finish Options:
    Chrome-Plated
    Make:
    Peterbilt
    $512.99
    Qty in Cart: 0
    Price:
    $512.99
    Subtotal:
  • FREE SHIPPING
    BESTfit Retro Style Exhaust Kit W/ 6-5 PB Elbows & 52 Spool For Peterbilt 378 & 379

    BESTfit Retro Style Exhaust Kit W/ 6-5 PB Elbows & 52 Spool For Peterbilt 378 & 379

    BESTFIT TRUCK PARTS

    $2,543.74
    Retro Style Exhaust Kit W/ 6-5 PB Elbows & 52 Spool By BESTfit Fits Peterbilt 378 & 379* High Quality Exhaust Kit* Retro OE Style Design* Includes:  - (2) 6 Inch To 5 Inch OE Style Chrome Exhaust...
    01-0896008
    SKU:
    01-0896008
    Product Type:
    Exhaust
    Location:
    Made In USA
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    Type Options:
    OE Style Elbows
    Cab Style:
    Unibilt W/2 Cab Brackets
    Diameter Options:
    6 Inch
    Style Options:
    No Stacks
    Material Options:
    Chrome-Plated Steel
    $2,543.74
    Qty in Cart: 0
    Price:
    $2,543.74
    Subtotal:
  • FREE SHIPPING
    BESTfit Exhaust Kit W/ 6-5 LD Elbows & No Top Stack/Spool For Peterbilt 378, 379 & 389 Glider

    BESTfit Exhaust Kit W/ 6-5 LD Elbows & No Top Stack/Spool For Peterbilt 378, 379 & 389 Glider

    BESTFIT TRUCK PARTS

    $2,834.98
    Exhaust Kit W/ 6-5 LD Elbows & No Top Stack/Spool By BESTfit Fits Peterbilt 378, 379 & 389 Glider* High Quality Exhaust Kit* Long Drop Design* Includes:  - (2) 6 Inch To 5 Inch 90 Degree Exhaust...
    01-0896007
    SKU:
    01-0896007
    Product Type:
    Exhaust
    Location:
    Made In USA
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    Diameter Options:
    6 Inch
    Cab Style:
    Unibilt W/2 Cab Brackets
    Material Options:
    Chrome-Plated Steel
    Type Options:
    Long Drop Elbows
    Style Options:
    No Stacks
    $2,834.98
    Qty in Cart: 0
    Price:
    $2,834.98
    Subtotal:
  • BESTfit Chrome Tapered Top Exhaust Elbow W/ 90 Degree Bend & LD Design For Peterbilt 378, 379 & 389 Glider

    BESTfit Chrome Tapered Top Exhaust Elbow W/ 90 Degree Bend & LD Design For Peterbilt 378, 379 & 389 Glider

    BESTFIT TRUCK PARTS

    $512.99
    Chrome Tapered Top Exhaust Elbow W/ 90 Degree Bend & LD Design By BESTfit Fits Peterbilt 378, 379 & 389 Glider* High Quality Exhaust Elbow* Made Of Chrome Plated Steel* 90 Degree Bend* Long Drop...
    01-080185004
    SKU:
    01-080185004
    Product Type:
    Exhaust
    Location:
    Made In USA
    Finish Options:
    Chrome-Plated
    Diameter Options:
    8 To 5 Inch
    Type Options:
    Long Drop
    Degree Options:
    90
    Material Options:
    Steel
    Make:
    Peterbilt
    $512.99
    Qty in Cart: 0
    Price:
    $512.99
    Subtotal:
  • BESTfit Stainless Steel Exhaust Clamp Kit For Peterbilt

    BESTfit Stainless Steel Exhaust Clamp Kit For Peterbilt

    BESTFIT TRUCK PARTS

    $381.99
    Stainless Steel Exhaust Clamp Kit By BESTfit Fits PeterbiltThe BESTfit Stainless Steel Exhaust Clamp Kit for Peterbilt provides everything needed to securely mount and support your truck's exhaust...
    01-0800500K01
    SKU:
    01-0800500K01
    Product Type:
    Exhaust
    Ready To Ship:
    Yes
    Diameter Options:
    5 Inch
    Material Options:
    Stainless Steel
    Position:
    Kit Full
    Make:
    Peterbilt
    $381.99
    Qty in Cart: 0
    Price:
    $381.99
    Subtotal:
  • BESTfit Chrome Exhaust Clamp W/ Wide Band Design & Angled Mount Bracket For Peterbilt

    BESTfit Chrome Exhaust Clamp W/ Wide Band Design & Angled Mount Bracket For Peterbilt

    BESTFIT TRUCK PARTS

    $129.99
    6 Inch Chrome Exhaust Clamp W/ Wide Band Design & Angled Mount Bracket By BESTfit Fits Peterbilt* High Quality Exhaust Clamp* Made Of Chrome Plated Steel* Wide Band Design* Angled Mount Bracket*...
    01-08006003
    SKU:
    01-08006003
    Product Type:
    Exhaust
    Location:
    Made In USA
    Width Options:
    3 Inch
    Finish Options:
    Chrome-Plated
    Type Options:
    Angled
    Diameter Options:
    6 Inch
    Style Options:
    Wide Style
    Material Options:
    Steel
    Make:
    Peterbilt
    $129.99
    Qty in Cart: 0
    Price:
    $129.99
    Subtotal:
  • BESTfit Stainless Steel Exhaust Cab Bracket W/ Angled Mount Design For Peterbilt 379

    BESTfit Stainless Steel Exhaust Cab Bracket W/ Angled Mount Design For Peterbilt 379

    BESTFIT TRUCK PARTS

    $109.99
    Stainless Steel Exhaust Cab Bracket W/ Angled Mount Design By BESTfit Fits Peterbilt 379Provide reliable exhaust system support with the BESTfit Stainless Steel Exhaust Cab Bracket with Angled Mount...
    01-080000017
    SKU:
    01-080000017
    Product Type:
    Exhaust
    Location:
    Made In USA
    Finish Options:
    Polished
    Cab Style:
    Unibilt
    Type Options:
    Angled
    Material Options:
    Stainless Steel
    Make:
    Peterbilt
    $109.99
    Qty in Cart: 0
    Price:
    $109.99
    Subtotal:
  • BESTfit Chrome Exhaust Clamp W/ Wide Band Design For Peterbilt

    BESTfit Chrome Exhaust Clamp W/ Wide Band Design For Peterbilt

    BESTFIT TRUCK PARTS

    $129.99
    6 Inch Chrome Exhaust Clamp W/ Wide Band Design By BESTfit Fits Peterbilt* High Quality Exhaust Clamp* Made Of Chrome Plated Steel* Wide Band Design* Straight Mount Bracket* Mounting Hardware...
    01-08006002
    SKU:
    01-08006002
    Product Type:
    Exhaust
    Finish Options:
    Chrome-Plated
    Type Options:
    Straight Mount
    Diameter Options:
    6 Inch
    Style Options:
    Wide Style
    Material Options:
    Steel
    Location:
    Made In USA
    Width Options:
    3 Inch
    Make:
    Peterbilt
    $129.99
    Qty in Cart: 0
    Price:
    $129.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Aluminum A/C Expansion Valve Block Type W/ Flange Mount For Peterbilt

    BESTfit Aluminum A/C Expansion Valve Block Type W/ Flange Mount For Peterbilt

    BESTFIT TRUCK PARTS

    $46.99
    Aluminum A/C Expansion Valve Block Type W/ Flange Mount By BESTfit Fits PeterbiltRestore efficient cooling performance with the BESTfit Aluminum A/C Expansion Valve Block Type with Flange Mount for...
    01-070000043
    SKU:
    01-070000043
    Product Type:
    Engine Parts
    Material Options:
    Aluminum
    Type Options:
    Flange Mount
    Make:
    Peterbilt
    $46.99
    Qty in Cart: 0
    Price:
    $46.99
    Subtotal:
  • FREE SHIPPING
    BESTfit 11 X 13.750 Inch A/C Evaporator W/ Orifice Tube Valve Type & Plate Fin Design For Peterbilt

    BESTfit 11 X 13.750 Inch A/C Evaporator W/ Orifice Tube Valve Type & Plate Fin Design For Peterbilt

    BESTFIT TRUCK PARTS

    $384.99
    11 X 13.750 Inch A/C Evaporator W/ Orifice Tube Valve Type & Plate Fin Design By BESTfit Fits PeterbiltKeep your Peterbilt's air conditioning system performing at peak efficiency with the BESTfit 11...
    01-070000045
    SKU:
    01-070000045
    Product Type:
    Engine Parts
    Make:
    Peterbilt
    $384.99
    Qty in Cart: 0
    Price:
    $384.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Internal Equalized Thermal Expansion 16.5 Inch Capillary Tube Length For Peterbilt

    BESTfit Internal Equalized Thermal Expansion 16.5 Inch Capillary Tube Length For Peterbilt

    BESTFIT TRUCK PARTS

    $64.99
    Internal Equalized Thermal Expansion 16.5 Inch Capillary Tube Length By BESTfit Fits PeterbiltThe BESTfit Internal Equalized Thermal Expansion Valve with 16.5 Inch Capillary Tube is designed to...
    01-070000044
    SKU:
    01-070000044
    Product Type:
    Engine Parts
    Material Options:
    Brass
    Make:
    Peterbilt
    $64.99
    Qty in Cart: 0
    Price:
    $64.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Stainless Steel Bumper Support Bracket For Peterbilt 378 & 379 W/ 20 & 22 Inch Bumper

    BESTfit Stainless Steel Bumper Support Bracket For Peterbilt 378 & 379 W/ 20 & 22 Inch Bumper

    BESTFIT TRUCK PARTS

    $132.99
    Stainless Steel Bumper Support Bracket For 20 & 22 Inch Bumper By BESTfit Fits Peterbilt 378 & 379 W/ 20 & 22 Inch BumperThe BESTfit Stainless Steel Bumper Support Bracket Set is a dependable upgrade...
    01-0114016
    SKU:
    01-0114016
    Product Type:
    Bumpers
    Finish Options:
    Polished
    Material Options:
    Stainless Steel
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    $132.99
    Qty in Cart: 0
    Price:
    $132.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Stainless Steel Lower Bumper Support Brackets For Peterbilt 378 & 379 W/ 16, 18 & 20 Inch Bumper

    BESTfit Stainless Steel Lower Bumper Support Brackets For Peterbilt 378 & 379 W/ 16, 18 & 20 Inch Bumper

    BESTFIT TRUCK PARTS

    $122.99
    Stainless Steel Lower Bumper Support Brackets By BESTfit Fits Peterbilt 378 & 379 W/ 16, 18 & 20 Inch BumperEnhance the strength and appearance of your truck's front end with BESTfit Stainless Steel...
    01-0114015
    SKU:
    01-0114015
    Product Type:
    Bumpers
    Material Options:
    Stainless Steel
    Finish Options:
    Polished
    Location:
    Made In USA
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    $122.99
    Qty in Cart: 0
    Price:
    $122.99
    Subtotal:
  • FREE SHIPPING OVER $249
    10 LED 4 Inch Stop. Turn And Tail Light Kit, Red LED/ Red Lens

    10 LED 4 Inch Stop. Turn And Tail Light Kit, Red LED/ Red Lens

    UNITED PACIFIC

    $17.22
    Red LED Light Kit With 3 Contact Female Plug* High Quality Stop/Turn/Tail LED Light* Solid State Circuit Board Design* DOT/SAE, FMVSS 108* IP67 Water Resistant Rating* Includes:  - Polycarbonate...
    09-16090248
    SKU:
    09-16090248
    Diameter Options:
    4 Inch
    Truck Class:
    Universal
    Material Options:
    Plastic/Poly
    Product Type:
    Lighting
    Make:
    Universal Items
    Shape Options:
    Round
    $17.22
    Qty in Cart: 0
    Price:
    $17.22
    Subtotal:
  • FREE SHIPPING OVER $249
    10 LED 4 Inch Stop. Turn And Tail Light - Red LED/ Red Lens

    10 LED 4 Inch Stop. Turn And Tail Light - Red LED/ Red Lens

    UNITED PACIFIC

    $13.40
    4 Inch Stop. Turn And Tail Light* High Quality Stop/Turn/Tail LED Light* Solid State Circuit Board Design* DOT/SAE, FMVSS 108* IP67 Water Resistant Rating* Includes:  - Polycarbonate Lens  - Fully...
    09-16090247
    SKU:
    09-16090247
    Material Options:
    Plastic/Poly
    Product Type:
    Lighting
    Diameter Options:
    4 Inch
    Shape Options:
    Round
    Truck Class:
    Universal
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $13.40
    Qty in Cart: 0
    Price:
    $13.40
    Subtotal:
  • Minimizer Double Deuce Full Fender Kit W/ Light Box Options & Carbon Fiber Style Plastic Mounting Brackets

    Minimizer Double Deuce Full Fender Kit W/ Light Box Options & Carbon Fiber Style Plastic Mounting Brackets

    MINIMIZER

    $2,038.99 - $4,118.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of TrucksMinimizer Liquid Platium Double Deuce Full Fender Kit W/ Carbon Fiber Style Plastic Mounting...
    PPR_301050
    SKU:
    PPR_301050
    Style Options:
    Double Deuce Style
    Color:
    Red
    Finish Options:
    Galvanized
    Color:
    Black
    Color:
    Silver
    Color:
    Smoke
    Length Options:
    106 Inch
    Finish Options:
    Mirror
    Color:
    White
    Finish Options:
    Paintable
    Product Type:
    Rear Fenders
    Light Options:
    Without Lights
    Length Options:
    102 Inch
    Location:
    Made In USA
    Width Options:
    26 Inch
    Material Options:
    Plastic/Poly
    Truck Class:
    Heavy Duty
    Type Options:
    Full Fender
    Make:
    Universal Items
    $2,038.99 - $4,118.99
    Qty in Cart: 0
    Price:
    $2,038.99 - $4,118.99
    Subtotal:
  • Total: items /

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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