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Peterbilt 386 Elbows, Piping & Comp.

Shop for replacement Peterbilt 386 exhaust elbows, pipes, and related hardware components. We stock a large selection of aftermarket parts to help upgrade your exhaust system.
  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • BESTfit Aluminized Exhaust Connector 6 ID X 6 OD X 6 Inch

    BESTfit Aluminized Exhaust Connector 6 ID X 6 OD X 6 Inch

    BESTFIT TRUCK PARTS

    $37.13
    BESTfit 6 Inch I.D.-O.D. X 6 Inch OAL Aluminized Steel Connector* High Quality Connector* Joins O.D. and I.D. Ended Pipes Together* Made Of Durable 16 Gauge Aluminized Steel* 6 Inch Diameter* 6 Inch...
    09-080100045
    SKU:
    09-080100045
    Truck Class:
    Universal
    Diameter Options:
    6 Inch
    Length Options:
    6 Inch
    Material Options:
    Aluminized Steel
    Make:
    Universal Items
    Product Type:
    Exhaust
    $37.13
    Qty in Cart: 0
    Price:
    $37.13
    Subtotal:
  • BESTfit Chrome Exhaust Connector 5 ID X 5 OD X 6 Inch

    BESTfit Chrome Exhaust Connector 5 ID X 5 OD X 6 Inch

    BESTFIT TRUCK PARTS

    $65.99
    BESTfit 5 Inch ID-OD X 6 Inch OAL Chrome-Plated Steel Connector* High Quality Coupler* Aluminized Steel* Dimensions  - 6 Inch Length  - 5 Inch Diameter* Hardware Not Included* Sold Individually*...
    09-080100044
    SKU:
    09-080100044
    Truck Class:
    Universal
    Diameter Options:
    5 Inch
    Material Options:
    Steel
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Length Options:
    6 Inch
    Product Type:
    Exhaust
    $65.99
    Qty in Cart: 0
    Price:
    $65.99
    Subtotal:
  • BESTfit Aluminized Exhaust Connector 4 ID X 4 OD X 6 Inch

    BESTfit Aluminized Exhaust Connector 4 ID X 4 OD X 6 Inch

    BESTFIT TRUCK PARTS

    $28.36
    BESTfit 4 Inch I.D.-O.D. X 6 Inch OAL Aluminized Steel Connector* High Quality Exhaust Coupler* Connects O.D. and I.D. Ended Pipes Together* Made Of Durable 16 Gauge Aluminized Steel* Dimensions  - 4...
    09-080100043
    SKU:
    09-080100043
    Diameter Options:
    4 Inch
    Truck Class:
    Universal
    Material Options:
    Aluminized Steel
    Make:
    Universal Items
    Length Options:
    6 Inch
    Product Type:
    Exhaust
    $28.36
    Qty in Cart: 0
    Price:
    $28.36
    Subtotal:
  • BESTfit Aluminized Exhaust Connector 3-1/2 ID X 3-1/2 OD X 6 Inch

    BESTfit Aluminized Exhaust Connector 3-1/2 ID X 3-1/2 OD X 6 Inch

    BESTFIT TRUCK PARTS

    $25.45
    BESTfit 3.5 Inch I.D.-O.D. X 6 Inch OAL Aluminized Steel Connector* High Quality Exhaust Coupler* Connects O.D. and I.D. Ended Pipes Together* Made Of Durable 16 Gauge Aluminized Steel* Dimensions  -...
    09-080100042
    SKU:
    09-080100042
    Diameter Options:
    3 1/2 Inch
    Truck Class:
    Universal
    Material Options:
    Aluminized Steel
    Make:
    Universal Items
    Length Options:
    6 Inch
    Product Type:
    Exhaust
    $25.45
    Qty in Cart: 0
    Price:
    $25.45
    Subtotal:
  • BESTfit 7 ID X 8 InchChrome Exhaust Coupler

    BESTfit 7 ID X 8 InchChrome Exhaust Coupler

    BESTFIT TRUCK PARTS

    $127.99
    BESTfit 7 Inch ID X 8 Inch OAL Chrome-Plated Steel Coupler* High Quality Coupler* Chrome-Plated Steel* Dimensions  - 8 Inch Length  - 7 Inch Diameter* Hardware Not Included* Sold Individually*...
    09-080100041
    SKU:
    09-080100041
    Truck Class:
    Universal
    Diameter Options:
    7 Inch
    Material Options:
    Steel
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Product Type:
    Exhaust
    $127.99
    Qty in Cart: 0
    Price:
    $127.99
    Subtotal:
  • BESTfit 6 ID X 8 InchChrome Exhaust Coupler

    BESTfit 6 ID X 8 InchChrome Exhaust Coupler

    BESTFIT TRUCK PARTS

    $104.99
    BESTfit 6 Inch ID X 8 Inch OAL Chrome-Plated Steel Coupler* High Quality Coupler* Aluminized Steel * Dimensions  - 8 Inch Length  - 6 Inch Diameter* Hardware Not Included* Sold Individually* Warranty...
    09-080100040
    SKU:
    09-080100040
    Truck Class:
    Universal
    Diameter Options:
    6 Inch
    Length Options:
    8 Inch
    Material Options:
    Steel
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Product Type:
    Exhaust
    $104.99
    Qty in Cart: 0
    Price:
    $104.99
    Subtotal:
  • BESTfit 4 ID X 8 Inch Chrome Exhaust Coupler

    BESTfit 4 ID X 8 Inch Chrome Exhaust Coupler

    BESTFIT TRUCK PARTS

    $66.99
    BESTfit 4 Inch ID-ID X 8 Inch OAL Chrome-Plated Steel Coupler* High Quality Coupler* Aluminized Steel* Dimensions  - 8 Inch Length  - 4 Inch Diameter* Hardware Not Included* Sold Individually*...
    09-080100036
    SKU:
    09-080100036
    Diameter Options:
    4 Inch
    Material Options:
    Aluminized Steel
    Finish Options:
    Chrome-Plated
    Length Options:
    8 Inch
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Exhaust
    $66.99
    Qty in Cart: 0
    Price:
    $66.99
    Subtotal:
  • BESTfit Chrome Exhaust Adapter Reducer 5 OD X 4 ID X 8 Inch

    BESTfit Chrome Exhaust Adapter Reducer 5 OD X 4 ID X 8 Inch

    BESTFIT TRUCK PARTS

    $92.99
    BESTfit 5 To 4 Inch Chrome Reducer Pipe* High Quality Reducer Pipe  - Chrome-Plated 304 Steel  - 5 Inch Outer Diameter  - 4 Inch Inner Diameter  - 8 Inch Length* Sold Individually* Warranty On Chrome...
    09-080100021
    SKU:
    09-080100021
    Truck Class:
    Universal
    Diameter Options:
    5 Inch
    Length Options:
    8 Inch
    Material Options:
    Steel
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Product Type:
    Exhaust
    $92.99
    Qty in Cart: 0
    Price:
    $92.99
    Subtotal:
  • BESTfit Aluminized Exhaust Connector 5 ID X 5 OD X 6 Inch

    BESTfit Aluminized Exhaust Connector 5 ID X 5 OD X 6 Inch

    BESTFIT TRUCK PARTS

    $26.71
    BESTfit 5 X 6 Inch Aluminized Connector PipeThis BESTfit connector securely joins an exhaust pipe with a 5-inch outside diameter to a pipe with a 5-inch inside diameter. Measuring 6 inches long, it...
    09-080100019
    SKU:
    09-080100019
    Truck Class:
    Universal
    Diameter Options:
    5 Inch
    Length Options:
    6 Inch
    Material Options:
    Aluminized Steel
    Make:
    Universal Items
    Product Type:
    Exhaust
    Ready To Ship:
    Yes
    $26.71
    Qty in Cart: 0
    Price:
    $26.71
    Subtotal:
  • BESTfit 8 X 36 Inch 14 Gauge Carbon Steel Tubing

    BESTfit 8 X 36 Inch 14 Gauge Carbon Steel Tubing

    BESTFIT TRUCK PARTS

    $100.99
    BESTfit 14 Gauge Carbon Steel Tubing - 8 Inch Diameter & 36 Inch Length* High Quality Exhaust Pipe* Made Of 14 Gauge Carbon Steel* No Finish, Oiled* 8 Inch O.D. * 36 Inch Height * Sold As...
    09-080100014
    SKU:
    09-080100014
    Diameter Options:
    8 Inch
    Truck Class:
    Universal
    Length Options:
    36 Inch
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Exhaust
    Ready To Ship:
    Yes
    $100.99
    Qty in Cart: 0
    Price:
    $100.99
    Subtotal:
  • BESTfit 7 X 36 Inch 14 Gauge Carbon Steel Tubing

    BESTfit 7 X 36 Inch 14 Gauge Carbon Steel Tubing

    BESTFIT TRUCK PARTS

    $91.99
    BESTfit 14 Gauge Carbon Steel Tubing - 7 Inch Diameter & 36 Inch Length* High Quality Exhaust Pipe* Made Of 14 Gauge Carbon Steel* No Finish-Oiled* 7 Inch O.D. * 36 Inch Height * Sold As Individually...
    09-080100013
    SKU:
    09-080100013
    Diameter Options:
    7 Inch
    Truck Class:
    Universal
    Length Options:
    36 Inch
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Exhaust
    Ready To Ship:
    Yes
    $91.99
    Qty in Cart: 0
    Price:
    $91.99
    Subtotal:
  • BESTfit 6 X 36 Inch 16 Gauge Carbon Steel Tubing

    BESTfit 6 X 36 Inch 16 Gauge Carbon Steel Tubing

    BESTFIT TRUCK PARTS

    $46.57
    BESTfit 16 Gauge Carbon Steel Tubing - 6 Inch Diameter & 36 Inch Length* High Quality Exhaust Pipe* Made Of 16 Gauge Carbon Steel* No Finish-Oiled* 6 Inch O.D. * 36 Inch Height * Sold As Individually...
    09-080100012
    SKU:
    09-080100012
    Truck Class:
    Universal
    Diameter Options:
    6 Inch
    Length Options:
    36 Inch
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Exhaust
    Ready To Ship:
    Yes
    $46.57
    Qty in Cart: 0
    Price:
    $46.57
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Aluminized Steel Exhaust Adapter Reducer 8 ID X 5 OD X 8 Inch Length

    BESTfit Aluminized Steel Exhaust Adapter Reducer 8 ID X 5 OD X 8 Inch Length

    BESTFIT TRUCK PARTS

    $105.99
    BESTfit Exhaust Adapter Reducer 8 Inch ID to 5 Inch O.D.Connect exhaust pipes with this 8 inch adaptor with a 8 inch ID belled end and a 5 inch O.D. plain end. It is made of aluminized steel.* High...
    09-0801000
    SKU:
    09-0801000
    Truck Class:
    Universal
    Length Options:
    8 Inch
    Material Options:
    Aluminized Steel
    Make:
    Universal Items
    Diameter Options:
    5 Inch
    Product Type:
    Exhaust
    Ready To Ship:
    Yes
    $105.99
    Qty in Cart: 0
    Price:
    $105.99
    Subtotal:
  • 5 Inch Diameter X 3 Inch Marmon Flange by BESTfit

    5 Inch Diameter X 3 Inch Marmon Flange by BESTfit

    BESTFIT TRUCK PARTS

    $78.61
    BESTfit 5 Inch Diameter X 3 Inch Marmon Flange* High Quality Flange* 304 Stainless Steel* 5 Inch Diameter * 3 Inch Length* Bead 5 3/4 Inch * Sold Individually* Warranty On Flange Against Defects In...
    09-0800114
    SKU:
    09-0800114
    Truck Class:
    Universal
    Diameter Options:
    5 Inch
    Material Options:
    Steel
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Product Type:
    Exhaust
    Ready To Ship:
    Yes
    $78.61
    Qty in Cart: 0
    Price:
    $78.61
    Subtotal:
  • BESTfit 4 Inch Diameter X 3 Inch Marmon Flange

    BESTfit 4 Inch Diameter X 3 Inch Marmon Flange

    BESTFIT TRUCK PARTS

    $56.91
    BESTfit 4 Inch Diameter X 3 Inch Marmon Flange* High Quality Flange* 4 Inch Marmon Flange* 3 Inch Long* Sold Individually* Warranty On Flange Against Defects In Workmanship & Material From Date Of...
    09-0800113
    SKU:
    09-0800113
    Truck Class:
    Universal
    Diameter Options:
    4 Inch
    Style Options:
    Flanged
    Material Options:
    Steel
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Product Type:
    Exhaust
    Ready To Ship:
    Yes
    $56.91
    Qty in Cart: 0
    Price:
    $56.91
    Subtotal:
  • BESTfit Chrome Exhaust Adapter Reducer 4 OD X 3-1/2 ID X 8 Inch

    BESTfit Chrome Exhaust Adapter Reducer 4 OD X 3-1/2 ID X 8 Inch

    BESTFIT TRUCK PARTS

    $81.59
    BESTfit 4 To 3.5 Inch O.D.-I.D. X 8 Inch Chrome-Plated Steel Reducer* High Quality Connector O.D.-I.D.* Chrome-Plated Steel* Dimensions  - 8 Inch Length   - 3.5 Inch Diameter O.D.  - 4 Inch Diameter...
    09-080000055
    SKU:
    09-080000055
    Diameter Options:
    3 1/2 Inch
    Truck Class:
    Universal
    Length Options:
    8 Inch
    Material Options:
    Steel
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Product Type:
    Exhaust
    $81.59
    Qty in Cart: 0
    Price:
    $81.59
    Subtotal:
  • BESTfit 6 Inch I.D.-O.D. X 6 Inch Chrome-Plated Steel Connector

    BESTfit 6 Inch I.D.-O.D. X 6 Inch Chrome-Plated Steel Connector

    BESTFIT TRUCK PARTS

    $80.57
    BESTfit 6 Inch I.D.-O.D. X 6 Inch Chrome-Plated Steel Connector* High Quality Connector I.D.-O.D.* Chrome-Plated Steel* Dimensions  - 6 Inch Length  - 6 Inch Diameter I.D.  - 6 Inch Diameter O.D.*...
    09-080000053
    SKU:
    09-080000053
    Truck Class:
    Universal
    Diameter Options:
    6 Inch
    Material Options:
    Steel
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Length Options:
    6 Inch
    Product Type:
    Exhaust
    $80.57
    Qty in Cart: 0
    Price:
    $80.57
    Subtotal:
  • BESTfit 3 Inch I.D.-O.D. X 6 Inch Aluminized Steel Connector

    BESTfit 3 Inch I.D.-O.D. X 6 Inch Aluminized Steel Connector

    BESTFIT TRUCK PARTS

    $21.99
    BESTfit 3 Inch I.D.-O.D. X 6 Inch Aluminized Steel Connector* High Quality Connector* Aluminized Steel* Dimensions  - 6 Inch Length  - 3 Inch Diameter I.D.  - 3 Inch Diameter O.D.* Made in The USA*...
    09-080000052
    SKU:
    09-080000052
    Diameter Options:
    3 Inch
    Truck Class:
    Universal
    Material Options:
    Aluminized Steel
    Make:
    Universal Items
    Length Options:
    6 Inch
    Product Type:
    Exhaust
    $21.99
    Qty in Cart: 0
    Price:
    $21.99
    Subtotal:
  • BESTfit Chrome Exhaust Coupler 3-1/2 ID / ID X 8 Inch

    BESTfit Chrome Exhaust Coupler 3-1/2 ID / ID X 8 Inch

    BESTFIT TRUCK PARTS

    $59.99
    BESTfit 3.5 Inch I.D.-I.D. X 8 Inch Chrome-Plated Steel Coupler* High Quality Coupler I.D.-I.D.* Chrome-Plated Steel* Dimensions  - 8 Inch Length  - 3.5 Inch Diameter* Made in The USA* Sold...
    09-080000051
    SKU:
    09-080000051
    Diameter Options:
    3 1/2 Inch
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Length Options:
    8 Inch
    Product Type:
    Exhaust
    $59.99
    Qty in Cart: 0
    Price:
    $59.99
    Subtotal:
  • BESTfit 3.5 OD X 12 Inch Chrome-Plated Steel 90 Degree Elbow

    BESTfit 3.5 OD X 12 Inch Chrome-Plated Steel 90 Degree Elbow

    BESTFIT TRUCK PARTS

    $213.99
    BESTfit 3.5 Inch O.D.-O.D. X 12 Inch Chrome-Plated Steel 90 Degree Elbow* High Quality Elbow O.D.- O.D.* Chrome-Plated Steel* Dimensions  - 12 Inch Length  - 3.5 Inch Diameter  - 5 Inch Centerline to...
    09-080000049
    SKU:
    09-080000049
    Truck Class:
    Universal
    Diameter Options:
    3 1/2 Inch
    Style Options:
    Elbow
    Material Options:
    Steel
    Degree Options:
    90
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Length Options:
    12 Inch
    Product Type:
    Exhaust
    $213.99
    Qty in Cart: 0
    Price:
    $213.99
    Subtotal:
  • Total: items /

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Peterbilt 386 High-Flow Exhaust Plumbing & Replacement Piping

Find the right heavy-duty flex connectors, exhaust adapters, and universal Y-pipes to keep backpressure in check and your diesel engine breathing. We stock everything required to map out a reliable Class 8 exhaust system from the turbocharger housing to the vertical stack tips. Swap out cracked factory Paccar bellows with our premium aftermarket replacement kits to absorb harsh engine vibrations and frame twist. Route your exhaust cleanly using our exact-fit aluminized steel down pipes, stainless flex connectors, and precision Y-pipes. Splicing out a rusted section to pass a DOT inspection? Grab our 16-gauge straight exhaust tubes, V-band clamps, and slip-fit sizing reducers to patch your framework fast. We also carry the premium exterior hardware needed for full custom dual-stack conversions, including Peterbilt 386 exhaust brackets. Upgrade your Peterbilt 386 stacks with chrome 90-degree long drop elbows, mirror-polished center spools, and heavy-duty poly exhaust bushings to kill the bracket rattle.

Frequently Asked Questions About Peterbilt 386 Elbows, Piping & Comp.

What exhaust and air system components are included in this category?

This category covers elbows, piping sections, and related components used in the exhaust and air intake/charge air systems on Peterbilt 386 trucks. This includes exhaust elbows, straight and curved piping, and connecting pieces that route exhaust gases or air between the engine, turbo, muffler, and stacks.

Will these elbows and piping fit my specific Peterbilt 386 without modification?

Fit can vary depending on engine configuration, exhaust setup, and the model year of your truck, so it is important to check the listed diameter, angle, and length specifications against your existing components before ordering. If you are unsure, comparing your old part's measurements to the product listing is the most reliable way to confirm a proper fit.

What materials are these pipes and elbows made from, and how do they hold up?

Most piping and elbows in this category are constructed from aluminized or stainless steel to withstand high exhaust temperatures and resist corrosion over time. Stainless steel options generally offer better long-term resistance to rust, while aluminized steel provides a more budget-friendly alternative with solid heat resistance.

Do I need any special tools or professional help to install new piping or elbows?

Basic exhaust piping and elbows can often be installed with common hand tools, clamps, and possibly a torch or cutting tool if trimming is required. However, because proper alignment affects both performance and exhaust leaks, many owners choose to have installation done or checked by a qualified technician, especially for turbo-side or tightly routed sections.

Are these components compliant with emissions and noise regulations?

Replacement piping and elbows are generally designed to maintain the original exhaust flow path and are not intended to alter emissions performance when installed as a factory-equivalent replacement. That said, it is your responsibility to verify that any component you install keeps your truck compliant with DOT, EPA, and any state or local noise and emissions regulations that apply to your vehicle.


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