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Peterbilt 375/377 Exhaust Parts

Upgrade your Peterbilt 375/377 with an array of exhaust parts like mufflers, elbows, and clamps. Check out our vast chrome stack assortment, including lengths up to 114 inches and top styles like flat, West Coast turn, and miter cut.
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  • Price
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  • BESTfit NOx Sensor For Caterpillar Replaces 10041056, 4415129, 5390117

    BESTfit NOx Sensor For Caterpillar Replaces 10041056, 4415129, 5390117

    BESTFIT TRUCK PARTS

    $390.99
    NOx Sensor By BESTfit Replaces 10041056, 4415129, 5390117 Fits CaterpillarEnsure reliable emissions control and accurate engine performance with the BESTfit Caterpillar NOx Sensor, designed as a...
    29-08090072
    SKU:
    29-08090072
    Style Options:
    Caterpillar
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $390.99
    Qty in Cart: 0
    Price:
    $390.99
    Subtotal:
  • BESTfit NOx Sensor For Cummins Replaces 5EL039, 2894946RX, 2894946NX

    BESTfit NOx Sensor For Cummins Replaces 5EL039, 2894946RX, 2894946NX

    BESTFIT TRUCK PARTS

    $390.99
    NOx Sensor By BESTfit Replaces 5EL039, 2894946RX, 2894946NX Fits CumminsEnsure accurate emissions control and optimal engine performance with the BESTfit Cummins NOx Sensor, a direct replacement for...
    29-08090068
    SKU:
    29-08090068
    Product Type:
    Exhaust
    Style Options:
    Cummins
    Make:
    Universal Items
    $390.99
    Qty in Cart: 0
    Price:
    $390.99
    Subtotal:
  • BESTfit Diesel Particulate Filter For Cummins ISX Engine Replaces 2871838, 5289769, C0F5SA

    BESTfit Diesel Particulate Filter For Cummins ISX Engine Replaces 2871838, 5289769, C0F5SA

    BESTFIT TRUCK PARTS

    $2,621.99
    Diesel Particulate Filter By BESTfit Replaces 2871838, 5289769, C0F5SA Fits Cummins ISX EngineMaintain clean emissions and reliable performance with the BESTfit Cummins Diesel Particulate Filter...
    29-08090077
    SKU:
    29-08090077
    Product Type:
    Exhaust
    Style Options:
    Cummins
    Make:
    Universal Items
    $2,621.99
    Qty in Cart: 0
    Price:
    $2,621.99
    Subtotal:
  • BESTfit Diesel Particulate Filter Gasket For Caterpillar Replaces E300121, GA006, KPI50094G

    BESTfit Diesel Particulate Filter Gasket For Caterpillar Replaces E300121, GA006, KPI50094G

    BESTFIT TRUCK PARTS

    $11.99
    Diesel Particulate Filter Gasket By BESTfit Replaces E300121, GA006, KPI50094G Fits CaterpillarEnsure a reliable seal and optimal emissions performance with the BESTfit Caterpillar DPF Gasket, a...
    29-08090074
    SKU:
    29-08090074
    Style Options:
    Caterpillar
    Product Type:
    Exhaust
    Make:
    Universal Items
    $11.99
    Qty in Cart: 0
    Price:
    $11.99
    Subtotal:
  • BESTfit Diesel Particulate Filter For Caterpillar Engine Replaces 20R3511, 4373512, 4373518

    BESTfit Diesel Particulate Filter For Caterpillar Engine Replaces 20R3511, 4373512, 4373518

    BESTFIT TRUCK PARTS

    $3,765.99
    Diesel Particulate Filter By BESTfit Replaces 20R3511, 4373512, 4373518 Fits Caterpillar EngineMaximize emissions efficiency and reliability with the BESTfit CAT Diesel Particulate Filter (DPF),...
    29-08090060
    SKU:
    29-08090060
    Style Options:
    Caterpillar
    Product Type:
    Exhaust
    Make:
    Universal Items
    $3,765.99
    Qty in Cart: 0
    Price:
    $3,765.99
    Subtotal:
  • BESTfit Diesel Particulate Filter For Caterpillar Engine Replaces 20R8031, 3583668, D2011SA

    BESTfit Diesel Particulate Filter For Caterpillar Engine Replaces 20R8031, 3583668, D2011SA

    BESTFIT TRUCK PARTS

    $6,141.99
    Diesel Particulate Filter By BESTfit Replaces 20R8031, 3583668, D2011SA Fits Caterpillar EngineEnsure optimal emissions performance with the BESTfit Caterpillar DPF for heavy-duty engines. Replacing...
    29-08090073
    SKU:
    29-08090073
    Style Options:
    Caterpillar
    Product Type:
    Exhaust
    Make:
    Universal Items
    $6,141.99
    Qty in Cart: 0
    Price:
    $6,141.99
    Subtotal:
  • BESTfit Diesel Oxidation Catalyst For Cummins ISB Engines Replaces 5287474NX, C0119ID, A035H173

    BESTfit Diesel Oxidation Catalyst For Cummins ISB Engines Replaces 5287474NX, C0119ID, A035H173

    BESTFIT TRUCK PARTS

    $2,323.99
    Diesel Oxidation Catalyst By BESTfit Replaces 5287474NX, C0119ID, A035H173 Fits Cummins ISB EnginesEnsure dependable emissions control with the BESTfit Cummins DOC for ISB engines. Replacing part...
    29-08090067
    SKU:
    29-08090067
    Product Type:
    Exhaust
    Style Options:
    Cummins
    Make:
    Universal Items
    $2,323.99
    Qty in Cart: 0
    Price:
    $2,323.99
    Subtotal:
  • BESTfit Diesel Oxidation Catalyst For Paccar EPA10 Replaces 1837302, 1998412PE

    BESTfit Diesel Oxidation Catalyst For Paccar EPA10 Replaces 1837302, 1998412PE

    BESTFIT TRUCK PARTS

    $3,914.99
    Diesel Oxidation Catalyst By BESTfit Replaces 1837302, 1998412PE Fits Paccar EPA10Ensure dependable emissions control with the BESTfit PACCAR DOC for EPA10 engines. Replacing part numbers 1837302 and...
    29-08090070
    SKU:
    29-08090070
    Product Type:
    Exhaust
    Style Options:
    Paccar
    Make:
    Universal Items
    $3,914.99
    Qty in Cart: 0
    Price:
    $3,914.99
    Subtotal:
  • BESTfit Detroit Diesel 1-Box Assembly For Detroit DD13 & DD15 Engines Replaces 35030, 2140200007, C0313FL

    BESTfit Detroit Diesel 1-Box Assembly For Detroit DD13 & DD15 Engines Replaces 35030, 2140200007, C0313FL

    BESTFIT TRUCK PARTS

    $11,768.99
    Diesel 1-Box Assembly By BESTfit Replaces 35030, 2140200007, C0313FL Fits Detroit DD13 & DD15 EnginesEnsure maximum emissions efficiency with the BESTfit Detroit Diesel 1-Box Assembly for DD13 and...
    29-08090069
    SKU:
    29-08090069
    Product Type:
    Exhaust
    Style Options:
    Detroit
    Make:
    Universal Items
    $11,768.99
    Qty in Cart: 0
    Price:
    $11,768.99
    Subtotal:
  • BESTfit Diesel Particulate Filter For Cummins ISC Engine Replaces 3103617, 3978026, 52954

    BESTfit Diesel Particulate Filter For Cummins ISC Engine Replaces 3103617, 3978026, 52954

    BESTFIT TRUCK PARTS

    $1,952.99
    Diesel Particulate Filter By BESTfit Replaces 3103617, 3978026, 52954 Fits Cummins ISC EngineMaintain peak emissions performance with the BESTfit Volvo/Mack Diesel Particulate Filter (DPF), designed...
    29-08090056
    SKU:
    29-08090056
    Product Type:
    Exhaust
    Style Options:
    Cummins
    Make:
    Universal Items
    $1,952.99
    Qty in Cart: 0
    Price:
    $1,952.99
    Subtotal:
  • BESTfit Diesel Particulate Filter Gasket For Cummins Replaces 2871566, G02008, KPI60004G

    BESTfit Diesel Particulate Filter Gasket For Cummins Replaces 2871566, G02008, KPI60004G

    BESTFIT TRUCK PARTS

    $33.99
    Diesel Particulate Filter Gasket By BESTfit Replaces 2871566, G02008, KPI60004G Fits CumminsMaintain peak emissions system performance with the BESTfit Cummins DPF Gasket, a direct replacement for...
    29-08090063
    SKU:
    29-08090063
    Product Type:
    Exhaust
    Style Options:
    Cummins
    Make:
    Universal Items
    $33.99
    Qty in Cart: 0
    Price:
    $33.99
    Subtotal:
  • BESTfit Diesel Oxidation Catalyst For Cummins ISM Engines Replaces 4965054, 58039, C200017

    BESTfit Diesel Oxidation Catalyst For Cummins ISM Engines Replaces 4965054, 58039, C200017

    BESTFIT TRUCK PARTS

    $2,294.99
    Diesel Oxidation Catalyst By BESTfit Replaces 4965054, 58039, C200017 Fits Cummins ISM EnginesEnsure dependable emissions control with the BESTfit Cummins DOC for ISM engines. Replacing part numbers...
    29-08090066
    SKU:
    29-08090066
    Product Type:
    Exhaust
    Style Options:
    Cummins
    Make:
    Universal Items
    $2,294.99
    Qty in Cart: 0
    Price:
    $2,294.99
    Subtotal:
  • BESTfit Diesel Particulate Filter For Caterpillar Engine Replaces 20R0697, 20R5621, 20R8028

    BESTfit Diesel Particulate Filter For Caterpillar Engine Replaces 20R0697, 20R5621, 20R8028

    BESTFIT TRUCK PARTS

    $4,831.99
    Diesel Particulate Filter By BESTfit Replaces 20R0697, 20R5621, 20R8028 Fits Caterpillar EngineUpgrade your Caterpillar engine's emissions system with the BESTfit CAT DPF, a premium replacement for...
    29-08090059
    SKU:
    29-08090059
    Product Type:
    Exhaust
    Style Options:
    Caterpillar
    Make:
    Universal Items
    $4,831.99
    Qty in Cart: 0
    Price:
    $4,831.99
    Subtotal:
  • BESTfit Dieself Oxidation Catalyst For Cummins ISC/ISL Engines Replaces 2880588RX, 58221

    BESTfit Dieself Oxidation Catalyst For Cummins ISC/ISL Engines Replaces 2880588RX, 58221

    BESTFIT TRUCK PARTS

    $1,984.99
    Dieself Oxidation Catalyst By BESTfit Replaces 2880588RX, 58221 Fits Cummins ISC/ISL EnginesBuilt for durability and performance, the BESTfit Cummins ISC/ISL Diesel Oxidation Catalyst (DOC) replaces...
    29-08090052
    SKU:
    29-08090052
    Product Type:
    Exhaust
    Style Options:
    Cummins
    Make:
    Universal Items
    $1,984.99
    Qty in Cart: 0
    Price:
    $1,984.99
    Subtotal:
  • BESTfit Detroit Diesel DPF Gasket For Detroit 60 Series DD13, DD15 & DD16 Engines Replaces 2060209005, 21424458, ENVGDD0510

    BESTfit Detroit Diesel DPF Gasket For Detroit 60 Series DD13, DD15 & DD16 Engines Replaces 2060209005, 21424458, ENVGDD0510

    BESTFIT TRUCK PARTS

    $30.99
    Diesel DPF Gasket By BESTfit Replaces 2060209005, 21424458, ENVGDD0510 Fits Detroit 60 Series DD13, DD15 & DD16 EnginesMaximize peak performance and prevent exhaust leaks with the BESTfit Detroit...
    29-08090061
    SKU:
    29-08090061
    Product Type:
    Exhaust
    Style Options:
    Detroit
    Make:
    Universal Items
    $30.99
    Qty in Cart: 0
    Price:
    $30.99
    Subtotal:
  • BESTfit Cummins DPF Gasket For Cummins Replaces 4966447, G02011

    BESTfit Cummins DPF Gasket For Cummins Replaces 4966447, G02011

    BESTFIT TRUCK PARTS

    $13.99
    Cummins Diesel Particulate Filter Gasket By BESTfit Replaces 4966447, G02011Built for durability and performance, the BESTfit Cummins DPF Gasket replaces OEM part numbers 4966447 and G02011 for...
    29-08090048
    SKU:
    29-08090048
    Style Options:
    Cummins
    Product Type:
    Exhaust
    Make:
    Universal Items
    $13.99
    Qty in Cart: 0
    Price:
    $13.99
    Subtotal:
  • BESTfit Diesel Oxidation Catalyst For Cummins ISX Engines Replaces 58096, A047V527, 4353323RX

    BESTfit Diesel Oxidation Catalyst For Cummins ISX Engines Replaces 58096, A047V527, 4353323RX

    BESTFIT TRUCK PARTS

    $2,528.99
    Diesel Oxidation Catalyst By BESTfit Replaces 58096, A047V527, 4353323RX Fits Cummins ISX EnginesMaintain the performance and efficiency of your emissions system with the BESTfit Cummins Diesel...
    29-08090058
    SKU:
    29-08090058
    Product Type:
    Exhaust
    Style Options:
    Cummins
    Make:
    Universal Items
    $2,528.99
    Qty in Cart: 0
    Price:
    $2,528.99
    Subtotal:
  • BESTfit Diesel Oxidation Catalys For Cummins ISX Engines Replaces 58018, C0B4ID, 43006160

    BESTfit Diesel Oxidation Catalys For Cummins ISX Engines Replaces 58018, C0B4ID, 43006160

    BESTFIT TRUCK PARTS

    $2,705.99
    Diesel Oxidation Catalyst By BESTfit Replaces 58018, C0B4ID, 43006160 Fits Cummins ISX EnginesMaximize the performance of your Cummins ISX emissions system with the BESTfit Diesel Oxidation Catalyst...
    29-08090057
    SKU:
    29-08090057
    Product Type:
    Exhaust
    Style Options:
    Cummins
    Make:
    Universal Items
    $2,705.99
    Qty in Cart: 0
    Price:
    $2,705.99
    Subtotal:
  • BESTfit DIesel Particulate Filter For Cummins Replaces 5283911, ENVG1064, G02012

    BESTfit DIesel Particulate Filter For Cummins Replaces 5283911, ENVG1064, G02012

    BESTFIT TRUCK PARTS

    $12.99
    DIesel Particulate Filter Gasket By BESTfit Replaces 5283911, ENVG1064, G02012 Fits CumminsBuilt for durability and performance, the BESTfit Cummins DPF Gasket replaces OEM part numbers 5283911,...
    29-08090051
    SKU:
    29-08090051
    Style Options:
    Cummins
    Product Type:
    Exhaust
    Make:
    Universal Items
    $12.99
    Qty in Cart: 0
    Price:
    $12.99
    Subtotal:
  • BESTfit DPF For Caterpillar Engine Replaces 3750945, 3900659, 5913039

    BESTfit DPF For Caterpillar Engine Replaces 3750945, 3900659, 5913039

    BESTFIT TRUCK PARTS

    $4,789.95
    Diesel Particulate Filter By BESTfit Replaces 3750945, 3900659, 5913039Built for strength and performance, the BESTfit Caterpillar Diesel Particulate Filter (DPF) replaces OEM part numbers 3750945,...
    29-08090044
    SKU:
    29-08090044
    Style Options:
    Caterpillar
    Product Type:
    Exhaust
    Make:
    Universal Items
    $4,789.95
    Qty in Cart: 0
    Price:
    $4,789.95
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Adding your products to cart

Looking to get more out of your Peterbilt 375 or 377? Upgrading your semi truck exhaust system is a smart way to boost performance and add that custom big rig style. Our aftermarket exhaust parts help your Peterbilt 375/377 diesel engine perform cooler, cleaner, and more efficiently—mile after mile.

Why Upgrade Your 375/377 Semi Truck Exhaust System?

Your truck’s exhaust system does more than blow smoke. It directs heat and gases safely away from your engine, cuts down on emissions, and reduces noise. A healthy exhaust setup improves fuel economy, protects vital components, and keeps your truck compliant with emissions standards. Better airflow = better power. It's pretty much as simple as that.

Essential Components for a Stronger Exhaust System

Here’s what you’ll find in our aftermarket exhaust lineup: - Exhaust Manifolds: Collect gases from the engine’s cylinders and push them through the system. - Turbochargers: Use exhaust pressure to boost engine power. - Exhaust Piping & Elbows: Route gases from the engine to the back of your rig. - DOC & DPF Units: Help clean harmful particles and emissions from the exhaust. - Mufflers: Quiet the ride while keeping flow strong. - Chrome Stacks: Send cleaned exhaust up and out while making your rig stand out. These parts don’t just perform—they add serious style.

Shop Online for Aftermarket Replacements that Work

Whether you’re hauling coast-to-coast or running local jobs, your exhaust system takes a beating. That’s why our parts are built with high-quality materials like stainless steel, aluminized steel, and corrosion-resistant finishes. Choose from OEM-style replacements or go bold with custom chrome stacks and aftermarket mufflers that’ll turn heads.
From clamps, hangers, and Y-pipes to full exhaust kits, every part is designed to fit your Peterbilt 375 or 377 without a hassle. Installation is straightforward, and performance benefits are immediate: - Improve exhaust flow -Lower EGTs -Boost torque and fuel economy -Cut down on backpressure -Reduce engine wear You’ll also get that classic diesel sound that tells the road you're serious. If you're interested in a comprehensive performance tune-up, consider adding some better engine cooling components for the Peterbilt 375/377, or enhance the Pete 375/377 AC system for stronger under-the-hood airflow.

Frequently Asked Questions About Peterbilt 375/377 Exhaust Parts

Will these exhaust parts fit my specific year model Peterbilt 375 or 377?

Most of our exhaust components are designed to fit Peterbilt 375 models from 1987-2007 and Peterbilt 377 models from 1988-2000. However, there can be variations based on engine type and factory configurations. We recommend checking your truck's specific engine model (Cat 3406, Cummins N14, etc.) and confirming the exhaust pipe diameter before ordering. If you're unsure, our customer service team can help verify compatibility with your OEM number.

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

Aluminized steel parts are more budget-friendly and provide good corrosion resistance for 3-5 years under normal conditions. They're ideal for trucks in moderate climates. Stainless steel components cost more upfront but typically last 10+ years and better resist road salt, moisture, and extreme temperatures. For trucks operating in harsh winter conditions or coastal areas, stainless steel is worth the investment.

Can I install these exhaust parts myself, or do I need a professional?

Many exhaust components like straight pipes, elbows, and mufflers can be installed by experienced DIYers with basic tools including pipe clamps, a sawzall, and proper jack stands. However, complete system replacements, especially those requiring new hangers or bracket modifications, are best left to professionals. Installation typically takes 2-4 hours depending on the components. Always ensure proper clearances from fuel lines, air lines, and electrical components.

What size exhaust pipes do Peterbilt 375/377 trucks typically use?

Most Peterbilt 375/377 models use 5-inch diameter exhaust systems, though some earlier models and specific engine configurations may use 4-inch systems. Measure your existing exhaust pipe outside diameter to confirm - 5-inch pipes measure approximately 5 inches across, while 4-inch pipes measure 4 inches. Using the wrong size will result in poor fitment and potential exhaust leaks.

How do I know when it's time to replace my exhaust components?

Replace exhaust parts when you notice excessive rust holes, cracks at welded joints, louder than normal exhaust noise, or visible exhaust leaks (look for black soot marks). Performance issues like reduced fuel economy or loss of power can also indicate exhaust restrictions. During inspections, pay special attention to the flex pipe, muffler, and areas where pipes connect - these typically fail first due to vibration and thermal stress.


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