null

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 Chrome Long Drop 90 Degree Exhaust Elbow For Peterbilt

    BESTfit Chrome Long Drop 90 Degree Exhaust Elbow For Peterbilt

    BESTFIT TRUCK PARTS

    $425.99 - $610.99
    Give your Peterbilt 378 or 379 a polished, professional exhaust upgrade with the BESTfit Chrome Long Drop 90-Degree Exhaust Elbow. With several sizing options-66, 65, 77, 75, 88, and 85-this chrome...
    PPR_23846
    SKU:
    PPR_23846
    Truck Class:
    Heavy Duty
    Style Options:
    Long Drop
    Material Options:
    Steel
    Degree Options:
    90
    Make:
    Peterbilt
    Finish Options:
    Chrome-Plated
    Product Type:
    Exhaust
    Ready To Ship:
    Yes
    $425.99 - $610.99
    Qty in Cart: 0
    Price:
    $425.99 - $610.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit DPF Filter Clamp Replaces 2871863 & 21445455

    BESTfit DPF Filter Clamp Replaces 2871863 & 21445455

    BESTFIT TRUCK PARTS

    $34.16
    BESTfit Filter Clamp For DPFThe BESTfit DPF Filter Clamp delivers a reliable solution for keeping your DPF filter securely in place. Replacing part numbers 2871863 and 21445455, this high-quality...
    29-0809201
    SKU:
    29-0809201
    Truck Class:
    Heavy Duty
    Style Options:
    Cummins
    Material Options:
    Stainless Steel
    Make:
    Kenworth
    Make:
    Peterbilt
    Make:
    Western Star
    Make:
    International
    Make:
    Freightliner
    Product Type:
    Exhaust
    $34.16
    Qty in Cart: 0
    Price:
    $34.16
    Subtotal:
  • FREE SHIPPING
    Exhaust Flex Bellows Kit Replaces M66-3541, M66-4111 For Peterbilt & Kenworth

    Exhaust Flex Bellows Kit Replaces M66-3541, M66-4111 For Peterbilt & Kenworth

    DAYTON / DORMAN

    $463.99
    Exhaust Pipe Bellow KitThe Exhaust Flex Bellows Kit is an ideal replacement for outdated or damaged exhaust components, replacing OEM numbers M66-3541 and M66-4111. This kit, featuring a metal bellow...
    29-080419
    SKU:
    29-080419
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Kenworth
    Make:
    Peterbilt
    Finish Options:
    Chrome-Plated
    Length Options:
    12 1/2 Inch
    Diameter Options:
    3 1/2 Inch
    Product Type:
    Exhaust
    $463.99
    Qty in Cart: 0
    Price:
    $463.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 2.5 X 14.75 Inch Flex Connector W/ Flange Replaces M666559 For Kenworth & Peterbilt

    BESTfit 2.5 X 14.75 Inch Flex Connector W/ Flange Replaces M666559 For Kenworth & Peterbilt

    BESTFIT TRUCK PARTS

    $164.99
    SS 12 3/4 Inch DPF Flex ConnectorIntroducing the BESTfit 2.5 X 14.75 Inch Flex Connector with Flange, a replacement for OE number M66-6559. This premium connector, made in the USA, features a 2...
    29-080407
    SKU:
    29-080407
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Peterbilt
    Make:
    Kenworth
    Finish Options:
    Chrome-Plated
    Length Options:
    12 3/4 Inch
    Diameter Options:
    2 1/2 Inch
    Product Type:
    Exhaust
    $164.99
    Qty in Cart: 0
    Price:
    $164.99
    Subtotal:
  • BESTfit 5 X 14.5 Inch Bead Flex Connector W/ Flange Replaces M6665420335 For Kenworth & Peterbilt

    BESTfit 5 X 14.5 Inch Bead Flex Connector W/ Flange Replaces M6665420335 For Kenworth & Peterbilt

    BESTFIT TRUCK PARTS

    $324.99
    BESTfit Stainless Steel 14.5 Inch Long DPF Flex Connector PipeRevitalize your truck's exhaust system with the BESTfit 5 Inch X 14.5 Inch Bead Flex Connector, specifically designed to replace OE...
    29-080406
    SKU:
    29-080406
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Kenworth
    Make:
    Peterbilt
    Length Options:
    14 1/2 Inch
    Diameter Options:
    5 Inch
    Product Type:
    Exhaust
    $324.99
    Qty in Cart: 0
    Price:
    $324.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 5 X 11.375 Inch Bead Flex Connector W/ Flange Replaces M6665420320 For Kenworth & Peterbilt

    BESTfit 5 X 11.375 Inch Bead Flex Connector W/ Flange Replaces M6665420320 For Kenworth & Peterbilt

    BESTFIT TRUCK PARTS

    $245.99
    SS DPF Bead Flex Connector Pipe* High Quality Flex Connector* 5 Inch Flange x 5 Inch Flange x 11.375 Inch Compressed* Sold Individually* Made In USA* Warranty On Flex Connector Against Defects In...
    29-080405
    SKU:
    29-080405
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Peterbilt
    Make:
    Kenworth
    Diameter Options:
    5 Inch
    Product Type:
    Exhaust
    $245.99
    Qty in Cart: 0
    Price:
    $245.99
    Subtotal:
  • FREE SHIPPING
    BESTfit 4 X 14.25 Inch Flex Connector Replaces M66-65410-405, M66-7091-0405 For Kenworth & Peterbilt

    BESTfit 4 X 14.25 Inch Flex Connector Replaces M66-65410-405, M66-7091-0405 For Kenworth & Peterbilt

    BESTFIT TRUCK PARTS

    $289.99
    BESTfit Stainless Steel 14.25 Inch Long DPF Flex Connector W/ 4 Inch Flange* High Quality Exhaust Connector* 4 Inch Flange x 4 Inch Flange x 14.250 Inch Compressed* Sold Individually* Made In USA*...
    29-080404
    SKU:
    29-080404
    Truck Class:
    Heavy Duty
    Diameter Options:
    4 Inch
    Length Options:
    14 1/2 Inch
    Material Options:
    Steel
    Make:
    Kenworth
    Make:
    Peterbilt
    Finish Options:
    Chrome-Plated
    Product Type:
    Exhaust
    $289.99
    Qty in Cart: 0
    Price:
    $289.99
    Subtotal:
  • FREE SHIPPING
    BESTfit 4 X 12.25 Inch Flex Connector W/ Flange Replaces M6665410335, M6670910335 For Kenworth & Peterbilt

    BESTfit 4 X 12.25 Inch Flex Connector W/ Flange Replaces M6665410335, M6670910335 For Kenworth & Peterbilt

    BESTFIT TRUCK PARTS

    $305.99
    BESTfit Stainless Steel 12.25 Inch Long DPF Flex Connector W/ 4 Inch Flange* High Quality Flex Connector* Made Of Stainless Steel* 4 Inch Flange x 4 Inch Flange x 12.250 Inch Compressed* Sold...
    29-080403
    SKU:
    29-080403
    Truck Class:
    Heavy Duty
    Diameter Options:
    4 Inch
    Length Options:
    12 1/4 Inch
    Material Options:
    Steel
    Make:
    Peterbilt
    Make:
    Kenworth
    Finish Options:
    Chrome-Plated
    Product Type:
    Exhaust
    $305.99
    Qty in Cart: 0
    Price:
    $305.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 4 X 11.375 Inch Flex Connector Replaces M66-6541-0320 For Kenworth & Peterbilt

    BESTfit 4 X 11.375 Inch Flex Connector Replaces M66-6541-0320 For Kenworth & Peterbilt

    BESTFIT TRUCK PARTS

    $237.99
    BESTfit DPF Exhaust Flex Connector PipeBESTfit's 4 X 11.375 Inch Flex Connector is the top choice for replacing OE numbers M66-6541-0320 and M66-7091-0320, fitting a wide range of Kenworth and...
    29-080402
    SKU:
    29-080402
    Diameter Options:
    4 Inch
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Kenworth
    Make:
    Peterbilt
    Product Type:
    Exhaust
    $237.99
    Qty in Cart: 0
    Price:
    $237.99
    Subtotal:
  • Exhaust Bellows Kit Replaces 67PAC65420320. KW-6542-0320. KW65420320. M6665420320. M66-6542-0320 For Peterbilt & Kenworth

    Exhaust Bellows Kit Replaces 67PAC65420320. KW-6542-0320. KW65420320. M6665420320. M66-6542-0320 For Peterbilt & Kenworth

    AFTERMARKET

    $434.99
    Exhaust Bellows Kit W/ Clamp & GasketUpgrade your truck with the Exhaust Bellows Kit, designed for a wide range of Peterbilt and Kenworth models. This comprehensive kit includes two high-grade V-Band...
    29-08040005
    SKU:
    29-08040005
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Make:
    Kenworth
    Style Options:
    Cummins
    Material Options:
    Steel
    Product Type:
    Exhaust
    $434.99
    Qty in Cart: 0
    Price:
    $434.99
    Subtotal:
  • Exhaust Bellows Kit W/ 561.29475 V-Band Clamps, 562.U856636 Gaskets For Peterbilt & Kenworth

    Exhaust Bellows Kit W/ 561.29475 V-Band Clamps, 562.U856636 Gaskets For Peterbilt & Kenworth

    AFTERMARKET

    $498.99
    Exhaust Bellows Kit W/ Clamp & GasketThis Exhaust Bellows Kit comes complete with two precision-engineered V-Band clamps and two DPF Gasket Cummins, offering an optimal fit for a wide range of...
    29-08040004
    SKU:
    29-08040004
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Make:
    Peterbilt
    Style Options:
    Cummins
    Material Options:
    Steel
    Product Type:
    Exhaust
    $498.99
    Qty in Cart: 0
    Price:
    $498.99
    Subtotal:
  • Exhaust Bellows Kit W/ 561.29318 V-Band Clamps & 562.U46245 Gaskets For Peterbilt & Kenworth

    Exhaust Bellows Kit W/ 561.29318 V-Band Clamps & 562.U46245 Gaskets For Peterbilt & Kenworth

    AFTERMARKET

    $315.99
    Exhaust Bellows Kit W/ Clamp & Gasket* High Quality Exhaust Bellows* Made Of 3 Layers Of 304 Stainless Steel* 409 Stainless Steel Welded End Fittings* With Vibration Dampening Weave* Leak Proof...
    29-08040003
    SKU:
    29-08040003
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Make:
    Kenworth
    Material Options:
    Steel
    Product Type:
    Exhaust
    Ready To Ship:
    Yes
    $315.99
    Qty in Cart: 0
    Price:
    $315.99
    Subtotal:
  • Exhaust Bellows Kit W/ Gaskets & Hardware For Peterbilt & Kenworth W/ MX13 2016-2017

    Exhaust Bellows Kit W/ Gaskets & Hardware For Peterbilt & Kenworth W/ MX13 2016-2017

    AFTERMARKET

    $541.99
    Premium Exhaust BellowsTargeted for a range of Peterbilt and Kenworth models, the Exhaust Bellows Kit is the ultimate solution for drivers looking to enhance their exhaust's reliability. This...
    29-08040002
    SKU:
    29-08040002
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Make:
    Peterbilt
    Material Options:
    Steel
    Style Options:
    Cummins
    Product Type:
    Exhaust
    $541.99
    Qty in Cart: 0
    Price:
    $541.99
    Subtotal:
  • Exhaust Bellows Kit W/ Gaskets & Hardware For Peterbilt & Kenworth

    Exhaust Bellows Kit W/ Gaskets & Hardware For Peterbilt & Kenworth

    AFTERMARKET

    $420.99
    Exhaust Bellows KitDesigned for Peterbilt and Kenworth trucks, the Exhaust Bellows Kit is the ultimate solution for improving exhaust integrity and performance. This kit includes everything you need...
    29-08040001
    SKU:
    29-08040001
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Make:
    Kenworth
    Material Options:
    Steel
    Style Options:
    Cummins
    Product Type:
    Exhaust
    $420.99
    Qty in Cart: 0
    Price:
    $420.99
    Subtotal:
  • BESTfit 4.25 Inch Turbo Flare Lip 7.3 Ford Powerstroke Exhaust

    BESTfit 4.25 Inch Turbo Flare Lip 7.3 Ford Powerstroke Exhaust

    BESTFIT TRUCK PARTS

    $25.32
    BESTfit 3.5 X 4 Inch Type A Turbo Manifold Outlet With 4.25 Inch Flange Fits 7.3L Powerstroke EnginesImprove the turbo efficiency of your 7.3L Powerstroke with the BESTfit 3.5 X 4 Inch Type A Turbo...
    29-080100002
    SKU:
    29-080100002
    Diameter Options:
    3 Inch
    Truck Class:
    Heavy Duty
    Length Options:
    4 Inch
    Material Options:
    Aluminized Steel
    Product Type:
    Exhaust
    $25.32
    Qty in Cart: 0
    Price:
    $25.32
    Subtotal:
  • 5 Inch Aluminized Steel Double Bend Pipe W/ 5 Inch Inlet For 5, 6, 7 Inch Stack Kits by BESTfit

    5 Inch Aluminized Steel Double Bend Pipe W/ 5 Inch Inlet For 5, 6, 7 Inch Stack Kits by BESTfit

    BESTFIT TRUCK PARTS

    $353.99
    BESTfit 5 Inch 16G Aluminized Steel Double Bend Pipe For 5, 6, 7 Inch Stack Kits W/ 5 Inch Inlet* High Quality Stack* 16 Gauge Aluminized Steel* Dimensions  - 5 Inch Diameter  - 5 Inch Inlet...
    09-08G500008
    SKU:
    09-08G500008
    Diameter Options:
    5 Inch
    Material Options:
    Aluminized Steel
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Product Type:
    Exhaust
    $353.99
    Qty in Cart: 0
    Price:
    $353.99
    Subtotal:
  • 5 Inch 16G Aluminized Steel Double Bend Pipe For 5, 6, 7 Inch Stack Kits by BESTfit

    5 Inch 16G Aluminized Steel Double Bend Pipe For 5, 6, 7 Inch Stack Kits by BESTfit

    BESTFIT TRUCK PARTS

    $301.99
    BESTfit 5 Inch 16G Aluminized Steel Double Bend Pipe For 5, 6, 7 Inch Stack Kits* High Quality Double Bend Pipe* 16 Gauge Aluminized Steel* Dimensions  - 5 Inch Diameter* Used In 5, 6 And 7 Inch...
    09-08G500007
    SKU:
    09-08G500007
    Diameter Options:
    5 Inch
    Material Options:
    Aluminized Steel
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Product Type:
    Exhaust
    $301.99
    Qty in Cart: 0
    Price:
    $301.99
    Subtotal:
  • 4 Inch 16G Aluminized Steel Double Bend Pipe by BESTfit

    4 Inch 16G Aluminized Steel Double Bend Pipe by BESTfit

    BESTFIT TRUCK PARTS

    $257.99
    BESTfit 16G Aluminized Steel Double Bend Pipe For 4 Inch Stack Kits* High Quality Stack Kit* 16 Gauge Aluminized Steel* Dimensions  - 4 Inch Double Bend Pipe  - 4 Inch Stack kit* Made in The USA*...
    09-08G400004
    SKU:
    09-08G400004
    Diameter Options:
    4 Inch
    Material Options:
    Aluminized Steel
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Product Type:
    Exhaust
    $257.99
    Qty in Cart: 0
    Price:
    $257.99
    Subtotal:
  • FREE SHIPPING
    5 Inch Chrome-Plated Stainless Steel Y Pipe

    5 Inch Chrome-Plated Stainless Steel Y Pipe

    LINCOLN CHROME

    $251.99
    Lincoln Chrome Y Pipe 5 Inch Chrome Plated Stainless SteelRevitalize your exhaust system with the Lincoln Chrome 5 Inch Y Pipe, a premium exhaust component designed to deliver both style and...
    09-0806510
    SKU:
    09-0806510
    Diameter Options:
    5 Inch
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Finish Options:
    Chrome-Plated
    Style Options:
    Y-Pipe
    Truck Class:
    Heavy Duty
    Product Type:
    Exhaust
    Ready To Ship:
    Yes
    $251.99
    Qty in Cart: 0
    Price:
    $251.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 5 Inch ID/OD Steel Universal Exhaust Y-Pipe 9 Inch L X 18 Inch W

    BESTfit 5 Inch ID/OD Steel Universal Exhaust Y-Pipe 9 Inch L X 18 Inch W

    BESTFIT TRUCK PARTS

    $156.99
    BESTfit Exhaust Y-PipeMaximize your exhaust system with the BESTfit 5 Inch Diameter Steel Universal Exhaust Y-Pipe from 4 State Trucks. Constructed from premium steel, this Y-pipe features a 5-inch...
    09-0806505
    SKU:
    09-0806505
    Diameter Options:
    5 Inch
    Length Options:
    9 Inch
    Material Options:
    Steel
    Make:
    Universal Items
    Style Options:
    Y-Pipe
    Truck Class:
    Heavy Duty
    Product Type:
    Exhaust
    Width Options:
    18 Inch
    Ready To Ship:
    Yes
    $156.99
    Qty in Cart: 0
    Price:
    $156.99
    Subtotal:
  • Total: items /

Adding your products to cart

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.


Introducing the Official 4 State Trucks Mobile App – Gear Up On the Go!