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Peterbilt 357/378 Exhaust Parts

Looking to upgrade Peterbilt 357/378 exhaust? We've got you covered with a range of superior chrome stacks, ranging from 5 to 8 inches in diameter and top styles like curve turn, miter cut, and bull hauler. Our assortment also includes various aftermarket clamps, mufflers, and elbows. For a complete overhaul, check out our 6, 7, and 8-inch exhaust kit options from Lincoln Chrome, American Eagle, and BESTfit.
  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • BESTfit 4 X 12 Inch Galvanized Steel Flex Hose

    BESTfit 4 X 12 Inch Galvanized Steel Flex Hose

    BESTFIT TRUCK PARTS

    $19.29
    4 X 12 Inch Galvanized Flex Hose By BESTfitBuilt for durability and dependable operation, the BESTfit 4 x 12 Inch Galvanized Steel Flex Hose provides corrosion-resistant, flexible performance in a...
    GR-G15-412
    SKU:
    GR-G15-412
    Material Options:
    Steel
    Diameter Options:
    4 Inch
    Product Type:
    Exhaust
    Length Options:
    12 Inch
    Finish Options:
    Galvanized
    Style Options:
    Flex
    Make:
    Universal Items
    $19.29
    Qty in Cart: 0
    Price:
    $19.29
    Subtotal:
  • BESTfit 4 ID X 6 Inch Aluminized Steel Coupler

    BESTfit 4 ID X 6 Inch Aluminized Steel Coupler

    BESTFIT TRUCK PARTS

    $26.99
    4 ID X 6 Inch Aluminized Coupler By BESTfitEnsure long-lasting and secure pipe connections with the BESTfit 4 ID x 6 Inch Aluminized Steel Coupler. Constructed from high-quality 16-gauge aluminized...
    GR-CP-46A
    SKU:
    GR-CP-46A
    Product Type:
    Exhaust
    Make:
    Universal Items
    $26.99
    Qty in Cart: 0
    Price:
    $26.99
    Subtotal:
  • BESTfit 24 Inch 304 Stainless Steel Grab Handle

    BESTfit 24 Inch 304 Stainless Steel Grab Handle

    BESTFIT TRUCK PARTS

    $119.99
    24 Inch Stainless Steel Grab Handle By BESTfit1The BESTfit 24 Inch 304 Stainless Steel Grab Handle is a durable, corrosion-resistant solution for safe and convenient truck access. Made from...
    GR-GH-24S
    SKU:
    GR-GH-24S
    Length Options:
    24 Inch
    Product Type:
    Exhaust
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    $119.99
    Qty in Cart: 0
    Price:
    $119.99
    Subtotal:
  • BESTfit 7-5 Inch I.D. Exhaust Reducer

    BESTfit 7-5 Inch I.D. Exhaust Reducer

    BESTFIT TRUCK PARTS

    $62.99
    7-5 Inch Aluminized Exhaust Reducer By BESTfitMaintain reliable exhaust performance with the BESTfit 7-5 Inch I.D. Exhaust Reducer. Made from durable aluminized steel, it offers an 8-inch height and...
    09-080100601
    SKU:
    09-080100601
    Material Options:
    Aluminum
    Diameter Options:
    7 To 5 Inch
    Product Type:
    Exhaust
    Make:
    Universal Items
    $62.99
    Qty in Cart: 0
    Price:
    $62.99
    Subtotal:
  • BESTfit 6-5 ID X 96 Inch Chrome Curve Top Stack

    BESTfit 6-5 ID X 96 Inch Chrome Curve Top Stack

    BESTFIT TRUCK PARTS

    $695.00
    6-5 ID X 96 Inch Curve Top Stack By BESTfitAchieve smooth and efficient exhaust flow with the BESTfit 6-5 ID x 96 Inch Chrome Curve Top Stack. Made from chrome-plated steel for heavy-duty durability,...
    09-086596172
    SKU:
    09-086596172
    Product Type:
    Exhaust
    Finish Options:
    Chrome-Plated
    Material Options:
    Steel
    Diameter Options:
    6 To 5 Inch
    Height Options:
    96 Inch
    Position:
    Lower
    Style Options:
    Curve Turn
    Make:
    Universal Items
    $695.00
    Qty in Cart: 0
    Price:
    $695.00
    Subtotal:
  • 4-Inch Flex Tubing

    4-Inch Flex Tubing

    AFTERMARKET

    $32.31 - $56.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of Trucks4 X 18 Inch Black Stainless Steel Flex Tubing Replaces SF418, P2065544 X 18 Inch Black 304 Stainless...
    PPR_300364
    SKU:
    PPR_300364
    Length Options:
    18 Inch
    Product Type:
    Exhaust
    Diameter Options:
    4 Inch
    Color:
    Black
    Material Options:
    Stainless Steel
    Length Options:
    24 Inch
    Finish Options:
    Galvanized
    Material Options:
    Steel
    Make:
    Universal Items
    $32.31 - $56.99
    Qty in Cart: 0
    Price:
    $32.31 - $56.99
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  • BESTfit 3 X 10 X 12 Inch Aluminized Steel Universal Type A Y-Pipe With No Divider Plate

    BESTfit 3 X 10 X 12 Inch Aluminized Steel Universal Type A Y-Pipe With No Divider Plate

    BESTFIT TRUCK PARTS

    $222.99
    BESTfit 3 X 10 X 12 Inch Aluminized Steel Universal Type A Y-Pipe With No Divider PlateKeep the exhaust balanced and exhaust gasses at lower temperatures with this quality Y Pipe. It is constructed...
    09-080100202
    SKU:
    09-080100202
    Product Type:
    Exhaust
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminized Steel
    Diameter Options:
    3 Inch
    Make:
    Universal Items
    $222.99
    Qty in Cart: 0
    Price:
    $222.99
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  • BESTfit 4 X 12 X 26 Inch Aluminized Steel Universal Type A Y-Pipe With Divider Plate

    BESTfit 4 X 12 X 26 Inch Aluminized Steel Universal Type A Y-Pipe With Divider Plate

    BESTFIT TRUCK PARTS

    $317.99
    BESTfit 4 X 12 X 26 Inch Aluminized Steel Universal Type A Y-Pipe With Divider PlateMade with an aluminized steel, this Universal Type A Y pipe is designed to keep the exhaust balance and gasses at...
    09-080100204
    SKU:
    09-080100204
    Length Options:
    12 Inch
    Height Options:
    12 Inch
    Material Options:
    Aluminized Steel
    Truck Class:
    Heavy Duty
    Diameter Options:
    4 Inch
    Product Type:
    Exhaust
    Make:
    Universal Items
    $317.99
    Qty in Cart: 0
    Price:
    $317.99
    Subtotal:
  • BESTfit 3.5 X 10 X 14 Inch Aluminized Steel Universal Type A Y-Pipe W/ No Divider Plate

    BESTfit 3.5 X 10 X 14 Inch Aluminized Steel Universal Type A Y-Pipe W/ No Divider Plate

    BESTFIT TRUCK PARTS

    $194.99
    Aluminized Steel Type A Universal Y-Pipe W/ 10 Inch Tail & No Divider PlateKeep the exhaust balanced and gasses at lower temperatures with this quality Y Pipe. It is constructed with a corrosion and...
    09-080100203
    SKU:
    09-080100203
    Product Type:
    Exhaust
    Material Options:
    Aluminized Steel
    Truck Class:
    Heavy Duty
    Diameter Options:
    3 Inch
    Make:
    Universal Items
    $194.99
    Qty in Cart: 0
    Price:
    $194.99
    Subtotal:
  • BESTfit 4 X 8 X 12 Inch Aluminized Steel Universal Type A Y-Pipe With No Divider Plate

    BESTfit 4 X 8 X 12 Inch Aluminized Steel Universal Type A Y-Pipe With No Divider Plate

    BESTFIT TRUCK PARTS

    $256.99
    BESTfit 4 X 8 X 12 Inch Aluminized Steel Universal Type A Y-Pipe With No Divider PlateAre you wanting to increase engine power? 4 State trucks offers this quality Y Pipe that can improve the flow of...
    09-080100205
    SKU:
    09-080100205
    Diameter Options:
    4 Inch
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminized Steel
    Product Type:
    Exhaust
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $256.99
    Qty in Cart: 0
    Price:
    $256.99
    Subtotal:
  • BESTfit 5 Inch Multi-Bend Exhaust Elbow For Peterbilt 378, 379

    BESTfit 5 Inch Multi-Bend Exhaust Elbow For Peterbilt 378, 379

    BESTFIT TRUCK PARTS

    $354.99 - $396.99
    Choose Option(s) to see description.Fitment* Fits Peterbilt 378 1988 thru 2007* Fits Peterbilt 379 1987 thru 2007 ** Fits Peterbilt 379 119 & 127 BBC **BESTfit 5 Inch Multi-Bend Exhaust Elbow...
    PPR_300232
    SKU:
    PPR_300232
    Diameter Options:
    5 Inch
    Finish Options:
    Chrome-Plated
    Position:
    Driver Side
    Position:
    Passenger Side
    Product Type:
    Exhaust
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Style Options:
    Elbow Multi-Bend
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    $354.99 - $396.99
    Qty in Cart: 0
    Price:
    $354.99 - $396.99
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  • Stainless Steel IFTA Permit Exhaust Bracket W/ 2 Watermelon Light Holes

    Stainless Steel IFTA Permit Exhaust Bracket W/ 2 Watermelon Light Holes

    JML KUSTOMS

    $122.99
    IFTA Permit Exhaust Bracket W/ 1 Watermelon Light Hole Per BracketImprove your truck's compliance and front-end appearance with this Stainless Steel IFTA Permit Exhaust Bracket. Made from 304...
    09-161000063
    SKU:
    09-161000063
    Product Type:
    Lighting
    Make:
    Universal Items
    Material Options:
    Stainless Steel
    $122.99
    Qty in Cart: 0
    Price:
    $122.99
    Subtotal:
  • Stainless Steel IFTA Permit Exhaust Bracket W/ 2 Watermelon Light Holes & Sticker Space

    Stainless Steel IFTA Permit Exhaust Bracket W/ 2 Watermelon Light Holes & Sticker Space

    JML KUSTOMS

    $163.99
    IFTA Permit Exhaust Bracket W/ 1 Watermelon Light Hole Per Bracket & Sticker SpaceEquip your truck with this Stainless Steel IFTA Permit Exhaust Bracket, crafted to securely display IFTA and permit...
    09-161000062
    SKU:
    09-161000062
    Product Type:
    Lighting
    Make:
    Universal Items
    Material Options:
    Stainless Steel
    $163.99
    Qty in Cart: 0
    Price:
    $163.99
    Subtotal:
  • Lincoln Chrome 8 Inch Quiet Exhaust Kit, 2 Pc Stacks, W/Long Drop Elbows For Peterbilt 379, 378 & 389 Glider. Day Cab W/4 Cab Brackets

    Lincoln Chrome 8 Inch Quiet Exhaust Kit, 2 Pc Stacks, W/Long Drop Elbows For Peterbilt 379, 378 & 389 Glider. Day Cab W/4 Cab Brackets

    LINCOLN CHROME

    $4,613.99 - $6,216.99
    Are you looking to replace an exhaust? Stop searching, 4 State Trucks and Lincoln Chrome have got you covered. A damaged exhaust has the ability to decrease acceleration and power, increase fuel...
    01-08KQ830AD
    SKU:
    01-08KQ830AD
    Diameter Options:
    8 Inch
    Location:
    Made In USA
    Product Type:
    Exhaust
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    Type Options:
    Long Drop Elbows
    Material Options:
    Chrome-Plated Steel
    Style Options:
    2 Piece Stacks
    Cab Style:
    PB Day Cab W/4 Cab Brackets
    $4,613.99 - $6,216.99
    Qty in Cart: 0
    Price:
    $4,613.99 - $6,216.99
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  • BESTfit 304 Stainless Steel Flex Exhaust Hose - 25 Ft Roll

    BESTfit 304 Stainless Steel Flex Exhaust Hose - 25 Ft Roll

    BESTFIT TRUCK PARTS

    $599.99 - $1,209.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of TrucksBESTfit 6 Inch 304 Stainless Steel Flex Exhaust Hose - 25 Ft Roll25 Foot Roll of Heavy Duty Flexible...
    PPR_300053
    SKU:
    PPR_300053
    Product Type:
    Exhaust
    Diameter Options:
    6 Inch
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    $599.99 - $1,209.99
    Qty in Cart: 0
    Price:
    $599.99 - $1,209.99
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  • BESTfit 7 Inch OD Chrome West Coast Top Stack

    BESTfit 7 Inch OD Chrome West Coast Top Stack

    BESTFIT TRUCK PARTS

    $685.99 - $715.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of TrucksBESTfit 7 OD X 54 Inch Chrome West Coast Top Stack Replaces 25P-70054Cp7 OD X 54 Inch West Coast Top...
    PPR_300055
    SKU:
    PPR_300055
    Height Options:
    54 Inch
    Finish Options:
    Chrome-Plated
    Diameter Options:
    7 Inch
    Product Type:
    Exhaust
    Height Options:
    60 Inch
    Material Options:
    Steel
    Style Options:
    West Coast Turn
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $685.99 - $715.99
    Qty in Cart: 0
    Price:
    $685.99 - $715.99
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  • BESTfit 8 Inch OD Chrome West Coast Top Stack

    BESTfit 8 Inch OD Chrome West Coast Top Stack

    BESTFIT TRUCK PARTS

    $730.99 - $760.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of TrucksBESTfit 8 OD X 54 Inch Chrome West Coast Top Stack Replaces 25P-80054Cp8 OD X 54 Inch West Coast Top...
    PPR_300056
    SKU:
    PPR_300056
    Height Options:
    54 Inch
    Product Type:
    Exhaust
    Height Options:
    60 Inch
    Finish Options:
    Chrome-Plated
    Diameter Options:
    8 Inch
    Style Options:
    West Coast Turn
    Material Options:
    Steel
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $730.99 - $760.99
    Qty in Cart: 0
    Price:
    $730.99 - $760.99
    Subtotal:
  • BESTfit 8 OD Inch Chrome Exhaust Stack

    BESTfit 8 OD Inch Chrome Exhaust Stack

    BESTFIT TRUCK PARTS

    $611.99 - $641.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of TrucksBESTfit 8 OD X 54 Inch Chrome Flat Top Exhaust Stack Replaces 24P-80054Cp8 OD X 54 Inch Flat Top...
    PPR_300045
    SKU:
    PPR_300045
    Finish Options:
    Chrome-Plated
    Material Options:
    Steel
    Diameter Options:
    8 Inch
    Height Options:
    54 Inch
    Product Type:
    Exhaust
    Style Options:
    Miter Cut
    Height Options:
    60 Inch
    Style Options:
    Flat Top
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $611.99 - $641.99
    Qty in Cart: 0
    Price:
    $611.99 - $641.99
    Subtotal:
  • On Sale
    Limited Quantity Available
    BESTfit 7 OD Inch Chrome Exhaust Stack

    BESTfit 7 OD Inch Chrome Exhaust Stack

    BESTFIT TRUCK PARTS

    $405.77 - $596.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of TrucksBESTfit 7 OD X 54 Inch Chrome Flat Top Exhaust Stack Replaces 24P-70054Cp7 OD X 54 Inch Flat Top...
    PPR_300044
    SKU:
    PPR_300044
    Height Options:
    60 Inch
    Height Options:
    54 Inch
    Product Type:
    Exhaust
    Style Options:
    Flat Top
    Finish Options:
    Chrome-Plated
    Diameter Options:
    7 Inch
    Material Options:
    Steel
    Style Options:
    Miter Cut
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $405.77 - $596.99
    Qty in Cart: 0
    Price:
    $405.77 - $596.99
    Subtotal:
  • BESTfit 5 ID Inch Chrome Curved Exhaust Stack

    BESTfit 5 ID Inch Chrome Curved Exhaust Stack

    BESTFIT TRUCK PARTS

    $394.99 - $631.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of TrucksBESTfit 5 ID X 108 Inch Chrome Curved Exhaust StackChrome Curved Exhaust Stack* High Quality Stack*...
    PPR_300017
    SKU:
    PPR_300017
    Height Options:
    108 Inch
    Height Options:
    72 Inch
    Product Type:
    Exhaust
    Diameter Options:
    5 Inch
    Style Options:
    Curve Turn
    Finish Options:
    Chrome-Plated
    Material Options:
    Steel
    Make:
    Universal Items
    $394.99 - $631.99
    Qty in Cart: 0
    Price:
    $394.99 - $631.99
    Subtotal:
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Adding your products to cart

Thinking of replacing a worn-out exhaust part, enhancing your look with chrome stacks, or doing a complete exhaust system overhaul? Our aftermarket diesel exhaust components are ready to help your rig breathe better, sound stronger, and last longer.

Why Upgrade Your 357/378 Semi Truck Exhaust System?

The exhaust system isn’t just about noise—it’s about power, efficiency, and engine protection. A well-maintained or upgraded exhaust: - Improves airflow and reduces backpressure - Boosts fuel economy and throttle response - Lowers exhaust gas temps (EGTs) - Extends engine performance life - Adds a clean, aggressive look with chrome or black stacks Whether you're running a vocational setup with a 357 or hauling freight in a 378, better exhaust means better performance. Help your exhaust with superior under-the-hood airflow with AC parts for your Peterbilt 357/378 or upgrade your Peterbilt 357/378 engine performance components. What You'll Find in This Lineup: Our Peterbilt 357/378 exhaust collection includes: - Chrome exhaust stacks: Straight, miter, curved, or flat tops to match your rig’s personality - Exhaust piping & elbows: Smooth mandrel bends for efficient flow - Mufflers: Quiet things down without choking performance - Diesel Particulate Filters (DPF): Reduce emissions while keeping your truck compliant - Clamps, hangers & brackets: Keep your system tight and rattle-free - Complete exhaust kits: Everything you need to replace or upgrade in one go
These parts are built from heavy-duty steel or stainless steel, designed to resist corrosion, vibration, and extreme heat. So whether you're customizing for show or replacing for everyday use, you're getting durability you can count on.

Make Your Exhaust Work Harder (and Look Better)

From rugged job sites to long highway runs, your truck’s exhaust system is working nonstop. Upgrading with high-quality aftermarket parts gives you: - Better airflow = more power - More efficient emissions control - That bold, polished big rig look to stand out on the road
We stock direct-fit parts for Peterbilt 357 and 378 models. That means less time fighting with modifications and more time on the road. Plus, we carry universal and customizable options so you can dial in the exact look and function you're going for.

Frequently Asked Questions About Peterbilt 357/378 Exhaust Parts

Will these exhaust parts fit my specific year Peterbilt 357 or 378?

Most aftermarket exhaust components for Peterbilt 357/378 models are designed to fit trucks manufactured between 1987-2007. However, there can be variations based on engine type and chassis configuration. We recommend checking your truck's specific model year and engine (Cat C15, Cummins ISX, etc.) before ordering. If you're unsure, contact us with your OEM and we'll help verify compatibility.

What's the difference between aluminized and stainless steel exhaust components?

Aluminized steel exhaust parts offer good corrosion resistance at a lower price point and typically last 3-5 years under normal conditions. Stainless steel components cost more upfront but provide superior durability, lasting 7-10+ years and maintaining their appearance better. For trucks operating in harsh weather conditions or with high annual mileage, stainless steel provides better long-term value.

Do I need special tools or modifications to install these exhaust parts?

Most exhaust stacks, elbows, and straight pipes can be installed with basic hand tools and proper clamps. However, some installations may require cutting or adjusting existing pipes for proper fitment. We recommend having exhaust clamps, high-temperature sealant, and a reciprocating saw on hand. Professional installation typically takes 2-4 hours depending on the complexity of your setup.

What diameter exhaust pipe should I use for my Peterbilt 357/378?

Standard exhaust diameter for most Peterbilt 357/378 trucks is 5 inches, though some high-performance applications use 6-inch systems. Your existing exhaust diameter should match throughout the system to maintain proper backpressure. Measure your current exhaust outlet at the turbo or manifold to confirm the correct size before ordering replacement parts.

How do I prevent exhaust stacks from discoloring or rusting?

Chrome stacks require regular cleaning with chrome polish and should be wiped down after exposure to rain or road salt. Stainless steel stacks can be maintained with stainless steel cleaner and will naturally develop a light patina over time. Apply high-temperature wax or coating every few months for added protection. Avoid using abrasive cleaners or steel wool, which can scratch the finish and accelerate corrosion.


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