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Peterbilt 388 Exhaust Parts

Searching for replacement exhaust elbows, clamps, or mufflers for your Peterbilt 388? 4 State Trucks offers a wide range of aftermarket options to fit your needs. Explore a range of chrome stacks with lengths from 12 to 120 inches, diameters from 4 to 8 inch. and top styles like West Coast turn, miter cut, and bull hauler.
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  • Qty in Cart
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  • BESTfit 4.5 To 4 Inch ID / OD Exhaust Pipe Reducer

    BESTfit 4.5 To 4 Inch ID / OD Exhaust Pipe Reducer

    BESTFIT TRUCK PARTS

    $63.79
    Pipe Reducer 4 1/2 In ID Reduced to 4 in ID* High Quality Exhaust Pipe Reducer* Made Of Aluminized Steel* 4.5 Inch ID Reduced To 4 Inch OD* Made In USA* Sold Individually* Warranty On Exhaust Pipe...
    09-08010352
    SKU:
    09-08010352
    Product Type:
    Exhaust
    Material Options:
    Aluminized Steel
    Make:
    Universal Items
    $63.79
    Qty in Cart: 0
    Price:
    $63.79
    Subtotal:
  • BESTfit 4 Inch Polished Stainless Band Exhaust Clamp - 1.25 Inch Wide

    BESTfit 4 Inch Polished Stainless Band Exhaust Clamp - 1.25 Inch Wide

    BESTFIT TRUCK PARTS

    $14.99
    Polished Stainless Steel Band Clamp* High Quality Clamp* 430 Stainless Steel* Polished Finish* Dimensions:  - 4 Inch Diameter  - 1.25 Inch Wide Clamp* Made In USA* Sold Individually* Warranty On...
    09-08000023
    SKU:
    09-08000023
    Product Type:
    Exhaust
    Diameter Options:
    4 Inch
    Finish Options:
    Polished
    Width Options:
    1 1/4 Inch
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    $14.99
    Qty in Cart: 0
    Price:
    $14.99
    Subtotal:
  • BESTfit 9 Inch Diameter Type 1 Muffler With 5 Inch ID / ID

    BESTfit 9 Inch Diameter Type 1 Muffler With 5 Inch ID / ID

    BESTFIT TRUCK PARTS

    $184.99
    Universal Economy Standard Style Muffler* High Quality Muffler* Dimensions:  - 5 Inch Id/ID  - 9 Inch Body Diameter   - 44.5 Inch Body Length   - 51 Inch Overall Length* Made In USA* Sold...
    09-08020052
    SKU:
    09-08020052
    Product Type:
    Exhaust
    Diameter Options:
    5 Inch
    Length Options:
    51 Inch
    Make:
    Universal Items
    $184.99
    Qty in Cart: 0
    Price:
    $184.99
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  • BESTfit 4 To 2.5 Inch OD / ID Aluminized Exhaust Reducer Pipe

    BESTfit 4 To 2.5 Inch OD / ID Aluminized Exhaust Reducer Pipe

    BESTFIT TRUCK PARTS

    $31.00
    Heavy Duty OD to ID Reducer* High Quality Exhaust Pipe Reducer* Made Of Aluminized Steel* 4 Inch OD To 2.5 Inch ID* 8 Inch Height* Made In USA* Sold Individually* Warranty On Exhaust Pipe Reducers...
    09-08011711
    SKU:
    09-08011711
    Product Type:
    Exhaust
    Height Options:
    8 Inch
    Material Options:
    Aluminized Steel
    Make:
    Universal Items
    $31.00
    Qty in Cart: 0
    Price:
    $31.00
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  • BESTfit 5 OD X 28 Inch Chrome 3 Bend Miter Top Exhaust Stack For Dump Truck

    BESTfit 5 OD X 28 Inch Chrome 3 Bend Miter Top Exhaust Stack For Dump Truck

    BESTFIT TRUCK PARTS

    $418.99
    3 Bend Dump Truck StackLooking for dump truck exhaust stacks? This BESTfit 5-inch chrome exhaust stack gives your truck that perfect custom look. It features a clean miter cut top with a smooth...
    09-08010303
    SKU:
    09-08010303
    Product Type:
    Exhaust
    Diameter Options:
    5 Inch
    Finish Options:
    Chrome-Plated
    Style Options:
    Miter Cut
    Make:
    Universal Items
    $418.99
    Qty in Cart: 0
    Price:
    $418.99
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  • BESTfit 5 Inch ID/OD 90 Degree Stainless Steel Elbow Exhaust Pipe 15 X 15 Inch

    BESTfit 5 Inch ID/OD 90 Degree Stainless Steel Elbow Exhaust Pipe 15 X 15 Inch

    BESTFIT TRUCK PARTS

    $179.99
    5 Inch ID / OD Diameter 90 Degree Elbow Pipe* High Quality Elbow Pipe* Stainless Steel* 5 In I.D/O.D Diameter* 90 Degree* Made In USA* Sold Individually* Warranty On Elbow Pipes Against Defects In...
    09-08011712
    SKU:
    09-08011712
    Product Type:
    Exhaust
    Degree Options:
    90
    Diameter Options:
    5 Inch
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $179.99
    Qty in Cart: 0
    Price:
    $179.99
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  • BESTfit 3 Inch Preformed Stainless Lap Joint Exhaust Clamp

    BESTfit 3 Inch Preformed Stainless Lap Joint Exhaust Clamp

    BESTFIT TRUCK PARTS

    $17.99
    Flexible Wide Band Exhaust Clamp - Joins ID & OD PipeThis 360-degree sealing wide-band lap-joint exhaust clamp connects pipes and mufflers securely for a leak free seal. Pre-assembled design...
    09-08000178
    SKU:
    09-08000178
    Product Type:
    Exhaust
    Material Options:
    Stainless Steel
    Width Options:
    3 Inch
    Make:
    Universal Items
    $17.99
    Qty in Cart: 0
    Price:
    $17.99
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  • BESTfit 3 Inch 304 SS Lap Joint Exhaust Band Clamp

    BESTfit 3 Inch 304 SS Lap Joint Exhaust Band Clamp

    BESTFIT TRUCK PARTS

    $19.99
    Heavy Duty Exhaust Clamp for 3 Inch ID and OD Pipe ConnectionsThe 3 inch stainless steel exhaust band clamp makes connecting exhaust pipes simple and secure. Built from premium 304 stainless steel...
    09-08000117
    SKU:
    09-08000117
    Product Type:
    Exhaust
    Width Options:
    3 Inch
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    $19.99
    Qty in Cart: 0
    Price:
    $19.99
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  • BESTfit 5 OD/ID X 15 Inch Aluminized Steel 45 Degree Exhaust Elbow

    BESTfit 5 OD/ID X 15 Inch Aluminized Steel 45 Degree Exhaust Elbow

    BESTFIT TRUCK PARTS

    $64.81
    Replacement 45 Degree Exhaust Elbow* High Quality Elbow* Aluminized Steel* Dimensions:  - 5 Inch ID/OD  - 15 Inch Length  - 6 Inch Centerline Radius* 45 Degree* Made In USA* Sold Individually*...
    09-08010340
    SKU:
    09-08010340
    Product Type:
    Exhaust
    Degree Options:
    45
    Diameter Options:
    5 Inch
    Material Options:
    Stainless Steel
    Length Options:
    15 Inch
    Make:
    Universal Items
    $64.81
    Qty in Cart: 0
    Price:
    $64.81
    Subtotal:
  • BESTfit 8 Inch Chrome Flat Band Exhaust Clamp

    BESTfit 8 Inch Chrome Flat Band Exhaust Clamp

    BESTFIT TRUCK PARTS

    $65.99
    Chrome Flat Band Clamp* High Quality Flat Band Clamp* Chrome-Plated * 8 Inch * Flat* Sold Individually* Warranty On Band Clamps Against Defects In Workmanship & Material From Date Of Purchase*** High...
    09-080045
    SKU:
    09-080045
    Product Type:
    Exhaust
    Finish Options:
    Chrome-Plated
    Style Options:
    Flat
    Diameter Options:
    8 Inch
    Make:
    Universal Items
    $65.99
    Qty in Cart: 0
    Price:
    $65.99
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  • 7 Inch Chrome Narrow Style Cab Exhaust Clamp For Peterbilt

    7 Inch Chrome Narrow Style Cab Exhaust Clamp For Peterbilt

    UNITED PACIFIC

    $24.55
    Peterbilt Cab Mounting BracketUpgrade your Peterbilt cab exhaust system with this 7 Inch Chrome Narrow Style Cab Exhaust Clamp, engineered for durability and a precise fit. The chrome-plated surface...
    01-080015
    SKU:
    01-080015
    Material Options:
    Steel
    Product Type:
    Exhaust
    Length Options:
    7 Inch
    Finish Options:
    Chrome-Plated
    Make:
    Peterbilt
    $24.55
    Qty in Cart: 0
    Price:
    $24.55
    Subtotal:
  • BESTfit Upper Mount Exhaust Bushing Kit 11811, GAFF11811 For Peterbilt

    BESTfit Upper Mount Exhaust Bushing Kit 11811, GAFF11811 For Peterbilt

    BESTFIT TRUCK PARTS

    $45.69
    Upper Mount Exhaust Bushing Kit With Pivot BushingThe BESTfit Upper Mount Exhaust Bushing Kit is a high-quality replacement kit designed to secure and stabilize your Peterbilt exhaust system. This...
    01-080700013
    SKU:
    01-080700013
    Product Type:
    Exhaust
    Ready To Ship:
    Yes
    Position:
    Kit Full
    Make:
    Peterbilt
    $45.69
    Qty in Cart: 0
    Price:
    $45.69
    Subtotal:
  • BESTfit 5 Inch Stainless Steel Angled Exhaust Clamp For Peterbilt

    BESTfit 5 Inch Stainless Steel Angled Exhaust Clamp For Peterbilt

    BESTFIT TRUCK PARTS

    $136.99
    5 Inch Stainless Peterbilt Exhaust Clamp - Angled DesignNeed a strong exhaust clamp for your Pete? This 5-inch stainless clamp is built tough for Peterbilt stacks. The angled design matches your...
    01-08000020
    SKU:
    01-08000020
    Product Type:
    Exhaust
    Style Options:
    Angled
    Finish Options:
    Polished
    Material Options:
    Stainless Steel
    Make:
    Peterbilt
    Diameter Options:
    5 Inch
    $136.99
    Qty in Cart: 0
    Price:
    $136.99
    Subtotal:
  • 2.25 Inch Exhaust Clamp With Hanger

    2.25 Inch Exhaust Clamp With Hanger

    AUTOMANN USA

    $20.35
    Exhaust System Hanger fits 2.25 Inch PipeKeep your exhaust system secure and quiet with our heavy-duty 4-inch mounting bracket. Built tough to reduce vibration and provide rock-solid support for your...
    09-08000009
    SKU:
    09-08000009
    Product Type:
    Exhaust
    Diameter Options:
    4 Inch
    Make:
    Universal Items
    $20.35
    Qty in Cart: 0
    Price:
    $20.35
    Subtotal:
  • 5 Inch SS Guillotine Type Exhaust Clamp

    5 Inch SS Guillotine Type Exhaust Clamp

    AUTOMANN USA

    $26.56
    Exhaust Clamp For Pipe Size 5 Inch* High Quality Exhaust Clamp* Stainless Steel* 5 Inch Diameter* 3/8 Inch- 16 Threads* Sold Individually* Warranty On Exhaust Clamps Against Defects In Workmanship &...
    09-08000005
    SKU:
    09-08000005
    Product Type:
    Exhaust
    Material Options:
    Stainless Steel
    Diameter Options:
    5 Inch
    Make:
    Universal Items
    $26.56
    Qty in Cart: 0
    Price:
    $26.56
    Subtotal:
  • BESTfit Exhaust Mount Bushing Kit Replaces 11811, GAFF11811 For Peterbilt

    BESTfit Exhaust Mount Bushing Kit Replaces 11811, GAFF11811 For Peterbilt

    BESTFIT TRUCK PARTS

    $52.99
    Replacement Peterbilt Exhaust Mount Bushing Kit By BESTfitSay goodbye to rattles and vibrations with the BESTfit Exhaust Mount Bushing Kit for Peterbilt. Replacing 11811 and GAFF11811, this kit...
    01-080700014
    SKU:
    01-080700014
    Product Type:
    Exhaust
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    $52.99
    Qty in Cart: 0
    Price:
    $52.99
    Subtotal:
  • FREE SHIPPING
    BESTfit Aluminum Upper Fuel Tank Mounting Bracket Replaces 11-04855M000, 1104855M000 For Peterbilt W/ 26 Inch Diameter Tanks

    BESTfit Aluminum Upper Fuel Tank Mounting Bracket Replaces 11-04855M000, 1104855M000 For Peterbilt W/ 26 Inch Diameter Tanks

    BESTFIT TRUCK PARTS

    $335.99
    Aluminum Upper Fuel Tank Mounting Bracket For 26 Inch Diameter Fuel Tanks By BESTfitUpgrade your Peterbilt with this aluminum upper fuel tank mounting bracket, designed for 26-inch diameter fuel...
    01-0601011
    SKU:
    01-0601011
    Truck Class:
    Heavy Duty
    Product Type:
    Fuel Tanks
    Material Options:
    Aluminum
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    Position:
    Upper
    Diameter Options:
    26 Inch
    $335.99
    Qty in Cart: 0
    Price:
    $335.99
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  • DPF V-Band Clamp Kit DDEA4709950002, A4709970045 For Mercedes / Detroit Diesel DD13 / DD15

    DPF V-Band Clamp Kit DDEA4709950002, A4709970045 For Mercedes / Detroit Diesel DD13 / DD15

    AFTERMARKET

    $186.99
    DPF V-Band Clamp And 2 GasketsThe V-Band Clamp Kit is a direct replacement for DPF system flange connections, designed for quick and hassle-free assembly and disassembly thanks to its convenient...
    29-08060016
    SKU:
    29-08060016
    Material Options:
    Stainless Steel
    Product Type:
    Exhaust
    Make:
    Universal Items
    Style Options:
    Detroit
    $186.99
    Qty in Cart: 0
    Price:
    $186.99
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  • 4.69 Inch V-Band Clamp Replaces 1W2431

    4.69 Inch V-Band Clamp Replaces 1W2431

    AUTOMANN USA

    $25.44
    V-Band Clamp Diameter 4.69 Inch* High Quality V-Band Clamp* Stainless Steel* 4.69 Inch Nominal Diameter* Uses 1/4 Inch Bolt* With Torque Range Of 50-70 in-lbs * Sold Individually* Warranty On V-Band...
    29-08060009
    SKU:
    29-08060009
    Material Options:
    Stainless Steel
    Product Type:
    Exhaust
    Diameter Options:
    4 1/2 Inch
    Make:
    Universal Items
    $25.44
    Qty in Cart: 0
    Price:
    $25.44
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  • 5.25 Inch V-Band Clamp For Detroit Diesel

    5.25 Inch V-Band Clamp For Detroit Diesel

    AUTOMANN USA

    $26.71
    V-Band Coupling Clamp 5.25 Inch Nominal Clamp DiameterThe V Band clamp is a cost-effective solution for refurbishing worn flange connections in your exhaust system. Its V-shaped design ensures even...
    29-08060015
    SKU:
    29-08060015
    Product Type:
    Exhaust
    Material Options:
    Stainless Steel
    Diameter Options:
    5 1/4 Inch
    Make:
    Universal Items
    $26.71
    Qty in Cart: 0
    Price:
    $26.71
    Subtotal:
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Your Peterbilt 388 exhaust system does more than just move fumes—it affects your power, fuel efficiency, and engine health. A high-performance aftermarket exhaust reduces backpressure, improves airflow, and helps your engine run cooler and more efficiently. If you’re hauling heavy loads and pushing long miles, you need an exhaust system that can handle the job.

Why Buy Aftermarket Truck Exhaust Parts?

More Power, Better Efficiency – A free-flowing exhaust boosts horsepower and fuel economy, so you get the most out of every mile. Cooler Running Temps – Less backpressure means your engine breathes better, reducing heat buildup and preventing wear on critical components. Stronger, Longer-Lasting Parts – Heavy-duty clamps, brackets, and chrome stacks resist rust and corrosion, lasting longer than factory exhaust parts. Custom Look – Chrome exhaust stacks and polished mufflers give your truck a bold, professional finish.

How a Strong Exhaust System Keeps Your Rig Running

Your exhaust system doesn’t work alone—it’s connected to your engine, cooling system, chassis, and exterior components. Upgrading your exhaust means improving your entire truck. Peterbilt 388 Exhaust & Engine Cooling: Protecting Your Powertrain Turbochargers & Charge Air Coolers (CACs) work with a high-flow exhaust to increase power and prevent engine strain. Radiators, fan shrouds, and coolant systems regulate heat, keeping exhaust temperatures in check. Upgraded gaskets, clamps, and hoses ensure a leak-free system that won’t cause overheating or pressure loss. The Exhaust & Frame & Chassis: Keeping Your Rig Solid Strong exhaust mounts and brackets prevent unnecessary vibration and protect your chassis from stress fractures. Better exhaust routing prevents heat buildup near frame rails and suspension components. Durable exhaust clamps and supports keep everything secured under rough road conditions. The Exhaust & Exterior Parts: Performance with Style Chrome stacks and polished mufflers give your rig a clean, professional look on the road. High-quality heat shields and polished brackets keep exterior components from warping under heat. A properly maintained exhaust system prevents excess soot and residue, keeping your truck looking and running its best. Get a smarter upgrade as an owner-operator. A high-performance exhaust system is more than just a style upgrade—it’s a smart investment. Better exhaust flow means stronger performance, improved fuel economy, and longer engine life. When paired with cooling, chassis, and exterior upgrades, your truck runs better, lasts longer, and makes every mile more profitable.

Shop Aftermarket Exhaust Parts Today

From chrome stacks and high-flow mufflers to clamps, brackets, and complete exhaust systems, we have everything you need to upgrade your Peterbilt 388.

Frequently Asked Questions About Peterbilt 388 Exhaust Parts

What exhaust stack sizes are compatible with my Peterbilt 388, and how do I measure for the correct fit?

The Peterbilt 388 typically accommodates 5-inch or 6-inch diameter exhaust stacks, depending on your engine configuration and model year (2006-2015). To measure correctly, check your existing exhaust outlet diameter at the turbo or muffler connection point using calipers or a tape measure. Most 388 models with ISX or C15 engines use 5-inch systems, while some high-horsepower configurations may require 6-inch. Always verify your specific truck's requirements by checking the OEM plate or consulting your owner's manual before ordering.

Will aftermarket exhaust parts void my warranty or affect emissions compliance?

Installing aftermarket exhaust components on your Peterbilt 388 generally won't void your factory warranty if the parts meet OEM specifications and EPA requirements. However, any modifications that alter emissions controls, remove DPF systems, or bypass EGR components will violate federal emissions laws and can result in significant fines. Always choose exhaust parts that are clearly marked as EPA compliant and maintain all factory emissions equipment. For trucks still under warranty, we recommend keeping original parts for potential warranty claims.

What's the difference between aluminized and stainless steel exhaust components for my 388?

Aluminized steel exhaust parts feature a protective aluminum-silicon coating over mild steel, offering good corrosion resistance at a lower price point, typically lasting 3-5 years in normal conditions. Stainless steel components (usually 409 or 304 grade) provide superior longevity of 7-10+ years and better heat resistance, making them ideal for high-mileage operations or harsh environments. While stainless costs 40-60% more initially, it often proves more economical long-term for trucks running over 100,000 miles annually.

Can I install exhaust components myself, or do I need special tools and expertise?

Basic exhaust stack and tip replacements on the Peterbilt 388 can typically be completed with standard hand tools including wrenches, sockets, and band clamp tools. However, components like flex pipes, Y-pipes, or complete system overhauls often require welding equipment, cutting tools, and exhaust hangers. Most stack installations take 1-2 hours per side. Critical considerations include proper alignment to prevent cab contact, secure mounting to handle vibration, and maintaining appropriate clearances from air lines and electrical components. Professional installation is recommended for complex modifications or if you lack welding capabilities.

How do I match the exhaust finish to my truck's existing chrome and accessories?

Peterbilt 388 exhaust components come in three primary finishes: mirror-polished chrome, brushed stainless, and painted steel. Chrome-plated stacks provide the brightest shine but require regular polishing with chrome-specific cleaners to maintain appearance. Brushed stainless offers a more subtle, maintenance-free finish that won't peel or rust. When matching existing accessories, note that aftermarket chrome may have slight color variations compared to OEM parts. For the most consistent appearance, consider replacing exhaust components in pairs and choosing parts from the same manufacturer to ensure uniform finish quality.


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