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Peterbilt 357/378 Parts

Find the best Peterbilt 378 aftermarket parts in the business here at 4 State. The Peterbilt 378 semi truck represents all of the characteristics of the Peterbilt brand, and was a popular model with similar features to the Peterbilt 379. Pete truck models are a brand of choice for experienced truckers who need dependable semi trucks. 4 State Trucks has all the semi truck parts and accessories you need to make your Pete 378 stand out to showcase your unique personality. Whether you need aftermarket bumpers, exhaust, or fuel tanks, we've got you covered. Hit the open road in style and comfort with the best custom gear for your Peterbilt heavy duty truck or 18 wheeler.
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  • Outer Spindle Nut 4 Inch A/F & 3.25 Inch 12 Thread

    Outer Spindle Nut 4 Inch A/F & 3.25 Inch 12 Thread

    AFTERMARKET

    $43.85
    4 Inch A/F Outer Spindle Nut 3.25 Inch 12 Thread* High Quality Outer Spindle Nut* Dimensions:  - 4.00 Inch A/F  - 3.25 Inch - 12 Thread  - 0.38 Inch Thick* Sold Individually* Warranty On Outer...
    29-203301
    SKU:
    29-203301
    Product Type:
    Wheels
    Make:
    Universal Items
    $43.85
    Qty in Cart: 0
    Price:
    $43.85
    Subtotal:
  • 32 X 79 Inch Mattress W/ 7 Inch Base Height & 1 Inch C-Gell Height

    32 X 79 Inch Mattress W/ 7 Inch Base Height & 1 Inch C-Gell Height

    AFTERMARKET

    $302.99
    Mattress 32 X 79 Inch W/ 7 Inch Base Height & 1 Inch C-Gell Height* High Quality Mattress* Includes:  - 7 Inch Base Height  - 1 Inch C-Gell Height* Dimensions:  - 32 Inch Length Of The Truck  - 79...
    29-1545007
    SKU:
    29-1545007
    Product Type:
    Interior
    Height Options:
    8 Inch
    Width Options:
    79 Inch
    Length Options:
    32 Inch
    Make:
    Universal Items
    $302.99
    Qty in Cart: 0
    Price:
    $302.99
    Subtotal:
  • Roadworks Stainless Steel Hubcover W/ Super-Hub Dana-Spicer Hubcover & Mounting Hardware For Super-Hub Drive Axle Hubcovers

    Roadworks Stainless Steel Hubcover W/ Super-Hub Dana-Spicer Hubcover & Mounting Hardware For Super-Hub Drive Axle Hubcovers

    ROADWORKS

    $165.99
    Stainless Steel Hubcover W/ Super-Hub Dana-Spicer Hubcover & Mounting Hardware By Roadworks Fits Super-Hub Drive Axle Hubcovers* High Quality Hubcover* Made Of 304 Stainless Steel* Polished Finish*...
    29-2003028
    SKU:
    29-2003028
    Product Type:
    Wheels
    Location:
    Made In USA
    Finish Options:
    Polished
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    $165.99
    Qty in Cart: 0
    Price:
    $165.99
    Subtotal:
  • Fifth Wheel Mounting Rail 55 X 3 X 4 Inch

    Fifth Wheel Mounting Rail 55 X 3 X 4 Inch

    OPP - ORIGINAL PARTS PROGRAM

    $326.99
    55 X 3 X 4 Inch Fifth Wheel Mounting Rail* High Quality Fifth Wheel Mounting Rail* Includes:  - (2) 5th Wheel Mounting Angle Brackets* Dimensions:  - 55 Inch Length  - 3 Inch Width  - 4 Inch Height ...
    29-051100033
    SKU:
    29-051100033
    Product Type:
    Frame & Chassis
    Length Options:
    55 Inch
    Height Options:
    4 Inch
    Width Options:
    3 Inch
    Location:
    Made In USA
    Make:
    Universal Items
    $326.99
    Qty in Cart: 0
    Price:
    $326.99
    Subtotal:
  • Ridewell Bushing Replacement Kit W/ Hardware

    Ridewell Bushing Replacement Kit W/ Hardware

    RIDEWELL

    $276.99
    Bushing Replacement Kit W/ Hardware By Ridewell* High Quality Bushing Replacement Kit* Used For Light Trac Lift Axle Air Suspension (Not Included)* Includes:  - (2) Kits (1 Per Axle)  - Needed...
    29-05100584
    SKU:
    29-05100584
    Product Type:
    Frame & Chassis
    Position:
    Kit Full
    Location:
    Made In USA
    Make:
    Universal Items
    $276.99
    Qty in Cart: 0
    Price:
    $276.99
    Subtotal:
  • Bug Screen Hardware W/ 12 Pull DOT Fasteners For BS-4900 Abstract Bug Screen

    Bug Screen Hardware W/ 12 Pull DOT Fasteners For BS-4900 Abstract Bug Screen

    ROBERT JAMES ENTERPRISES

    $34.32
    Bug Screen Hardware W/ 12 Pull DOT Fasteners By Robert James Enterprises* High Quality Bug Screen Hardware* Hardware Kit For BS-4900 Abstract Bug Screen* (12) Pull DOT Fasteners* Sold Individually*...
    29-120904
    SKU:
    29-120904
    Product Type:
    Hood Parts & Acc.
    Position:
    Kit Full
    Make:
    Universal Items
    $34.32
    Qty in Cart: 0
    Price:
    $34.32
    Subtotal:
  • Stainless Steel 4 Inch Fuel Tank Strap Cover

    Stainless Steel 4 Inch Fuel Tank Strap Cover

    AFTERMARKET

    $56.99
    4 Inch Fuel Tank Strap Cover Stainless Steel* High Quality Fuel Tank Strap Cover* Made Of 20 Gauge 304 Stainless Steel* #8 Mirror Finish* 4 Inch Width* Sold Individually* Warranty On Fuel Tank Strap...
    29-06010023
    SKU:
    29-06010023
    Product Type:
    Fuel Tanks
    Finish Options:
    Polished
    Width Options:
    4 Inch
    Size Options:
    20 Gauge
    Material Options:
    Stainless Steel
    Location:
    Made In USA
    Make:
    Universal Items
    $56.99
    Qty in Cart: 0
    Price:
    $56.99
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  • NOX Sensor W/ Sensor Thread & Interface Module Replaces 2894945, 5293295RX & 2872297 For Cummins ISB

    NOX Sensor W/ Sensor Thread & Interface Module Replaces 2894945, 5293295RX & 2872297 For Cummins ISB

    AFTERMARKET

    $340.99
    NOX Sensor W/ Interface Module & Sensor Thread Fits Cummins ISB Replaces 2894945, 5293295RX & 2872297* High Quality NOX Sensor* Includes:  - Sensor Body  - Make-Specific Connector  - Interface...
    29-08060033
    SKU:
    29-08060033
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $340.99
    Qty in Cart: 0
    Price:
    $340.99
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  • Roadworks 94 X 4 Inch Stainless Steel Full Bumper Bar W/ 14 Round 2 Inch Amber Beehive LEDs & Amber Lens

    Roadworks 94 X 4 Inch Stainless Steel Full Bumper Bar W/ 14 Round 2 Inch Amber Beehive LEDs & Amber Lens

    ROADWORKS

    $375.99
    94 X 4 Inch Stainless Steel Full Bumper Bar W/ 14 Round 2 Inch Amber Beehive LEDs & Amber Lens By Roadworks* High Quality Full Bumper Bar* Made Of 430 Stainless Steel* Tabbed Top Lip On Ends*...
    09-010600195
    SKU:
    09-010600195
    Height Options:
    4 Inch
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Length Options:
    94 Inch
    Product Type:
    Bumpers
    Light Options:
    Without Lights
    Make:
    Universal Items
    $375.99
    Qty in Cart: 0
    Price:
    $375.99
    Subtotal:
  • 13/16 X 1 3/8 Inch Chrome Bullet Push On Lug Nut Covers - Pack Of 10

    13/16 X 1 3/8 Inch Chrome Bullet Push On Lug Nut Covers - Pack Of 10

    GRAND GENERAL

    $16.20
    Chrome Bullet Push On Lug Nut Covers* High Quality Nut Cover* Made Of Chrome-Plated Plastic* Bullet Style* Dimensions:  - 1-3/8 Inch Length  - 13/16 Inch A/F* Push-On* Sold As Pack (10)* Warranty On...
    09-20060015
    SKU:
    09-20060015
    Style Options:
    Push On
    Product Type:
    Wheels
    Finish Options:
    Chrome-Plated
    Make:
    Universal Items
    Shape Options:
    Bullet
    Length Options:
    1 1/4 Inch
    $16.20
    Qty in Cart: 0
    Price:
    $16.20
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  • 33mm x 4.25 Inch Chrome Cylinder Push On Lug Nut Cover

    33mm x 4.25 Inch Chrome Cylinder Push On Lug Nut Cover

    GRAND GENERAL

    $37.46
    Chrome Plastic Push On 33MM Flat Top Cylinder Lug Nut Cover* High Quality Nut Cover* Made Of Chrome-Plated Plastic* Cylinder Style* Dimensions:  - 4.25 Inch Length  - 33 MM Diameter* Push-On* Sold As...
    09-20050157
    SKU:
    09-20050157
    Length Options:
    4 1/4 Inch
    Shape Options:
    Cylindrical
    Finish Options:
    Chrome-Plated
    Style Options:
    Push On
    Make:
    Universal Items
    Product Type:
    Wheels
    $37.46
    Qty in Cart: 0
    Price:
    $37.46
    Subtotal:
  • 33mm x 4.5 Inch Chrome Spear Push On Lug Nut Cover

    33mm x 4.5 Inch Chrome Spear Push On Lug Nut Cover

    GRAND GENERAL

    $35.29
    Spear Chrome Plastic 33mm Lug Nut Cover* High Quality Nut Cover* Made Of Chrome-Plated Plastic* Spear Style* Dimensions:  - 4.5 Inch Length  - 33 MM Diameter* Push-On* Sold As Pack (10)* Warranty On...
    09-20050156
    SKU:
    09-20050156
    Finish Options:
    Chrome-Plated
    Product Type:
    Wheels
    Style Options:
    Push On
    Make:
    Universal Items
    Length Options:
    4 1/2 Inch
    Shape Options:
    Spherical
    $35.29
    Qty in Cart: 0
    Price:
    $35.29
    Subtotal:
  • 33mm x 5 Inch Chrome Hex Flat Top Screw On Lug Nut Cover - Pack Of 10

    33mm x 5 Inch Chrome Hex Flat Top Screw On Lug Nut Cover - Pack Of 10

    GRAND GENERAL

    $39.61
    33mm Chrome Hex Flat Top Lug Nut Cover - Screw On* High Quality Nut Cover* Made Of Chrome-Plated Plastic* Flat Top Hex Style* Dimensions:  - 5 Inch Length  - 33 MM A/F* Screw-On* Sold As Pack (10)*...
    09-20050152
    SKU:
    09-20050152
    Length Options:
    5 Inch
    Shape Options:
    Hexagon
    Product Type:
    Wheels
    Finish Options:
    Chrome-Plated
    Style Options:
    Thread On
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $39.61
    Qty in Cart: 0
    Price:
    $39.61
    Subtotal:
  • 33mm x 5 Inch Chrome Hex Flat Top Push On Lug Nut Cover - Pack Of 10

    33mm x 5 Inch Chrome Hex Flat Top Push On Lug Nut Cover - Pack Of 10

    GRAND GENERAL

    $39.61
    33mm Chrome Hex Flat Top Lug Nut Cover - Push On* High Quality Nut Cover* Made Of Chrome-Plated Plastic* Flat Top Hex Style* Dimensions:  - 5 Inch Length  - 33 MM A/F* Push-On* Sold As Pack (10)*...
    09-20050151
    SKU:
    09-20050151
    Finish Options:
    Chrome-Plated
    Product Type:
    Wheels
    Style Options:
    Push On
    Make:
    Universal Items
    Shape Options:
    Hexagon
    Length Options:
    5 Inch
    Ready To Ship:
    Yes
    $39.61
    Qty in Cart: 0
    Price:
    $39.61
    Subtotal:
  • 33mm x 3-1/2 Inch Chrome Gear Screw On Lug Nut Cover - Pack Of 10

    33mm x 3-1/2 Inch Chrome Gear Screw On Lug Nut Cover - Pack Of 10

    GRAND GENERAL

    $39.61
    33mm Chrome Plastic Gear Nut Covers - Screw OnThis Chrome plastic gear-style screw-on nut cover is a premium accessory designed for trucks and trailers, featuring a stylish chrome finish and easy...
    09-20050150
    SKU:
    09-20050150
    Finish Options:
    Chrome-Plated
    Product Type:
    Wheels
    Style Options:
    Thread On
    Make:
    Universal Items
    Length Options:
    3 1/2 Inch
    $39.61
    Qty in Cart: 0
    Price:
    $39.61
    Subtotal:
  • VC 16 Inch Chrome Bumper W/ Taper Rolled Ends & License Plate Options For Peterbilt 357, 359, 362 & 379 Logger

    VC 16 Inch Chrome Bumper W/ Taper Rolled Ends & License Plate Options For Peterbilt 357, 359, 362 & 379 Logger

    VALLEY CHROME PLATING

    $529.99 - $585.99
    Choose Option(s) to see description.Fitment* Fits Peterbilt 357 1987 thru 1987* Fits Peterbilt 359 1967 thru 1986* Fits Peterbilt 362 1987 thru 1987* Fits Peterbilt 379 1987 thru 2007** Fits Logger...
    PPR_301322
    SKU:
    PPR_301322
    Location:
    Made In USA
    Material Options:
    Steel
    Finish Options:
    Chrome-Plated
    Height Options:
    16 Inch
    Product Type:
    Bumpers
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    $529.99 - $585.99
    Qty in Cart: 0
    Price:
    $529.99 - $585.99
    Subtotal:
  • On Sale
    Limited Quantity Available
    LC 96 Inch Chrome Mitered Exhaust Top Stack W/ 8 Inch ID

    LC 96 Inch Chrome Mitered Exhaust Top Stack W/ 8 Inch ID

    LINCOLN CHROME

    Now: $290.61
    Was: $873.99
    Chrome Mitered Exhaust Top Stack 96 Inch W/ 8 Inch ID By Lincoln Chrome* High Quality Exhaust Top Stack* Made Of Chrome Plated Carbon Steel* Mitered Style* Slides Over Elbow (Elbow Not Included)*...
    09-08010786
    SKU:
    09-08010786
    Product Type:
    Exhaust
    Ready To Ship:
    Yes
    Height Options:
    96 Inch
    Finish Options:
    Chrome-Plated
    Material Options:
    Carbon Steel
    Style Options:
    Miter Cut
    Diameter Options:
    8 Inch
    Location:
    Made In USA
    Make:
    Universal Items
    Now: $290.61
    Was: $873.99
    Qty in Cart: 0
    Price:
    Now: $290.61
    Was: $873.99
    Subtotal:
  • Sun Visor For Peterbilt 2005 & Newer W/ Standard Cab Low Roof

    Sun Visor For Peterbilt 2005 & Newer W/ Standard Cab Low Roof

    PANELITE

    $372.99
    Sun Visor Fits Peterbilt 2005 & Newer W/ Standard Cab Low Roof* High Quality Sun Visor* For Standard Cab Low Roof Models* Will Not Fit Peterbilt 359 Extended Cab Models* Sold Individually* Warranty...
    01-090200010
    SKU:
    01-090200010
    Product Type:
    Exterior
    Material Options:
    Stainless Steel
    Finish Options:
    Polished
    Location:
    Made In USA
    Cab Style:
    Low Roof
    Make:
    Peterbilt
    $372.99
    Qty in Cart: 0
    Price:
    $372.99
    Subtotal:
  • Alumzd Steel Exhaust Pipe 5 Inch OD/OD W/ Multi Bend For Peterbilt 378

    Alumzd Steel Exhaust Pipe 5 Inch OD/OD W/ Multi Bend For Peterbilt 378

    AUTOMANN USA

    $440.99
    Multi Bend Alumzd Steel Exhaust Pipe 5 Inch OD/OD* High Quality Exhaust Pipe* Made Of Aluminized Steel* Multi Bend* Dimensions:  - 5.000 Inch OD/OD  - 0.062 Inch Thick* Sold Individually* Warranty On...
    01-08070038
    SKU:
    01-08070038
    Product Type:
    Exhaust
    $440.99
    Qty in Cart: 0
    Price:
    $440.99
    Subtotal:
  • FREE SHIPPING
    Bawer Stainless Steel Replacement Toolbox Double Door 30 X 24 Inch

    Bawer Stainless Steel Replacement Toolbox Double Door 30 X 24 Inch

    BAWER TOOL BOXES

    $515.99
    30 X 24 Inch Stainless Steel Replacement Toolbox Double Door By Bawer* High Quality Toolbox Replacement Double Door * Made Of Stainless Steel* Replaces The Doors Only For Bawer 24 x 24 x 60 Tool Box...
    TU807221
    SKU:
    TU807221
    Product Type:
    Toolboxes
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $515.99
    Qty in Cart: 0
    Price:
    $515.99
    Subtotal:
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Adding your products to cart

The Peterbilt 357 and 378 are known for their no-nonsense durability and old-school style. Whether you’re hauling heavy loads or running construction jobs, these workhorses are built to last—and we’re here to help you keep them in top shape.

Why Choose Aftermarket Peterbilt 357/378 Truck Parts?

- Engineered for your model: Every part is made to fit and function with your 357 or 378—so you can skip the guesswork and get back to work. - Performance you can count on: Keep your truck running strong with engine, transmission, suspension, fiberglass Pete 357/378 hood shells, LED headlights, and cab lighting accessories designed to turn heads. - Trusted brands, proven quality: We only carry parts from manufacturers we trust, so you know you're getting durable, road-tested gear. - Quick shipping, expert help: Get your parts fast and reach out to our team if you need help finding the right fit—we’ve got your back.

Shop the Perfect Aftermarket Accessories for Peterbilt 357/378 Trucks


Whether you're restoring a classic or keeping your work truck rolling, our Peterbilt 357 and 378 parts are built to match the strength and legacy of these iconic models. We stock a wide selection of aftermarket and replacement parts designed specifically for Peterbilt 357 and 378 models. From critical mechanical components to sleek interior cab accessory upgrades, we’ve got what you need to maintain, repair, or customize your rig. Explore our full selection and get the parts you need to keep your rig road-ready.

Frequently Asked Questions About Peterbilt 357/378 Parts

What years and models are compatible with Peterbilt 357/378 parts?

Most aftermarket parts for Peterbilt 357/378 trucks are designed to fit models from 1987 through 2007. However, there are important differences between early models (1987-1999) and later models (2000-2007), particularly in hood mounting points and grille configurations. Always verify the specific year range listed for each part, as some components like bumpers and fenders may have changed mounting hole patterns after the 2000 model year update.

Are aftermarket bumpers as durable as OEM Peterbilt bumpers?

Quality aftermarket bumpers are typically made from 16-gauge steel (same as OEM) and feature triple chrome plating or powder coating for corrosion resistance. The main differences you'll find are in the finishing details and fitment precision. While a well-made aftermarket bumper can last just as long as OEM, pay attention to the warranty offered - reputable manufacturers typically provide at least a 1-year warranty on chrome finish and 3-5 years on structural integrity.

What tools and modifications are needed to install replacement parts?

Most bolt-on parts like bumpers, grilles, and headlight assemblies require basic hand tools including socket sets (typically 1/2" to 3/4"), wrenches, and a drill with metal bits for any minor adjustments. Common installation challenges include slight drilling to align mounting holes (especially on pre-2000 models) and adjusting bumper brackets for proper fitment. Professional installation typically takes 2-4 hours for major components like bumpers or hoods.

What's the difference between chrome, stainless steel, and painted finishes?

Chrome-plated steel offers the brightest mirror finish but requires regular polishing and can pit in harsh climates. Stainless steel (usually 304 grade) provides excellent corrosion resistance with less maintenance but has a slightly duller appearance. Painted finishes are the most economical and can be color-matched to your truck, but may need repainting every 5-7 years depending on exposure. For winter driOEMg or coastal areas, stainless steel typically offers the best long-term value.

How do I ensure proper fitment when ordering hoods, fenders, or bumpers?

Start by confirming your exact model year and checking whether you have a standard or extended hood configuration. Measure key mounting points on your current parts before ordering - bumper width should be either 18" or 20" depending on your model. For hoods and fenders, verify whether you have the single-headlight or dual-headlight configuration. When in doubt, provide your OEM number when ordering to ensure compatibility, as some mid-year production changes aren't reflected in standard model year listings.


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