3.5 - inch Stainless Steel Downpipe for 2017 - 2023 6.6L Duramax L5P Chevy/GMC Trucks
3.5 - inch Stainless Steel Downpipe for 2017 - 2023 6.6L Duramax L5P Chevy/GMC Trucks

3.5'' Downpipe Exhaust for 2017-2023 6.6L Duramax L5P Chevy Silverado Gmc Sierra 2500 3500HD

$229.79
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Details

Product Overview

The 3.5'' Downpipe Exhaust is a high - performance aftermarket part designed specifically for 2017 - 2023 6.6L Duramax L5P Chevy Silverado and GMC Sierra 2500 & 3500HD pickup trucks. This downpipe exhaust is engineered to enhance the overall performance of your vehicle, providing improved exhaust flow and a more aggressive sound profile. Whether you're looking to boost horsepower for towing or simply want a more powerful driving experience, this downpipe exhaust is a great addition to your truck.

Ideal For

This downpipe exhaust is perfect for 2017, 2018, 2019, 2020, 2021, 2022, and 2023 Chevrolet Silverado & GMC Sierra 2500 & 3500HD 6.6L Duramax pickup truck owners who:

  • Are seeking better exhaust flow and increased engine performance.
  • Want to reduce engine bay temperatures for improved overall vehicle efficiency.
  • Are involved in off - road driving or competition applications where maximum exhaust flow is crucial.
  • Are looking to customize their truck with a high - quality, durable aftermarket part.

Please note that it will not fit Cab & Chassis trucks.
Shipping Details

Ontario CA / Springdale OH / Newark NJ
Package List
  • One 3.5'' Downpipe Exhaust
  • Heat - wrap for temperature management
  • All necessary hardware for installation, including the 4 - bolt flange with two installed studs
Delivery Time

2-5 working days inland in the United States

Product details

Core Advantages

Enhanced Exhaust Flow

The 3.5" stainless steel piping offers 20% better flow than the factory pipe. This improved flow allows the engine to expel exhaust gases more efficiently, reducing backpressure and enabling the engine to breathe more freely. As a result, you can expect an increase in horsepower and torque, providing a more powerful driving experience, especially when towing or accelerating.

Temperature Management

The included heat - wrap is a valuable addition. It helps keep engine bay temperatures down, which has several benefits. Lower engine bay temperatures can improve the performance and longevity of other engine components. Additionally, it reduces the amount of heat radiated into the cabin, creating a more comfortable driving environment, especially during long trips or in hot weather conditions.

Emissions - Friendly

One of the key advantages of this downpipe exhaust is that it will not affect the emissions systems of your vehicle. This means you can enjoy the performance benefits without worrying about violating emissions regulations. It's a great option for those who want to upgrade their truck while still being environmentally conscious.

Competition - Ready

Designed for maximum flow, this downpipe exhaust is ideal for competition applications. Whether you're participating in truck pulls, sled pulls, or other off - road racing events, the improved exhaust flow can give you a competitive edge. The 4 - bolt flange with two studs installed ensures a secure and leak - free connection, providing reliable performance under high - stress conditions.

Technical Specifications

Piping Size

The downpipe features 3.5" stainless steel piping. Stainless steel is known for its durability, corrosion resistance, and ability to withstand high temperatures, making it an ideal material for exhaust systems.

Flange Design

It comes with a 4 - bolt flange, and two studs are already installed. This design provides a strong and stable connection between the downpipe and the rest of the exhaust system, minimizing the risk of leaks and ensuring optimal performance.

Usage Note

This product is for off - road use only. Custom tuning is required to ensure proper engine operation and to take full advantage of the performance improvements offered by the downpipe exhaust.

Why Choose This 3.5'' Downpipe Exhaust

  • High - Quality Construction: Made from premium 3.5" stainless steel, this downpipe exhaust is built to last. It can withstand the rigors of off - road driving and high - performance applications, ensuring long - term reliability.
  • Performance Gains: With 20% better flow than the factory pipe, you'll experience noticeable improvements in horsepower and torque. This can translate to better towing capabilities, faster acceleration, and an overall more enjoyable driving experience.
  • Temperature Control: The included heat - wrap helps manage engine bay temperatures, protecting other components and improving the overall efficiency of your vehicle.
  • Emissions Compliance: You can upgrade your truck's performance without worrying about emissions issues, making it a responsible choice for environmentally conscious truck owners.
  • Competition - Proven: Designed for maximum flow, this downpipe exhaust is a popular choice among off - road enthusiasts and competitors, giving you the edge you need in high - stakes events.

Complete Package Contents

  • One 3.5'' Downpipe Exhaust
  • Heat - wrap for temperature management
  • All necessary hardware for installation, including the 4 - bolt flange with two installed studs

Compatibility List

  • 2017 Chevrolet Silverado 2500 & 3500HD 6.6L Duramax
  • 2017 GMC Sierra 2500 & 3500HD 6.6L Duramax
  • 2018 Chevrolet Silverado 2500 & 3500HD 6.6L Duramax
  • 2018 GMC Sierra 2500 & 3500HD 6.6L Duramax
  • 2019 Chevrolet Silverado 2500 & 3500HD 6.6L Duramax
  • 2019 GMC Sierra 2500 & 3500HD 6.6L Duramax
  • 2020 Chevrolet Silverado 2500 & 3500HD 6.6L Duramax
  • 2020 GMC Sierra 2500 & 3500HD 6.6L Duramax
  • 2021 Chevrolet Silverado 2500 & 3500HD 6.6L Duramax
  • 2021 GMC Sierra 2500 & 3500HD 6.6L Duramax
  • 2022 Chevrolet Silverado 2500 & 3500HD 6.6L Duramax
  • 2022 GMC Sierra 2500 & 3500HD 6.6L Duramax
  • 2023 Chevrolet Silverado 2500 & 3500HD 6.6L Duramax
  • 2023 GMC Sierra 2500 & 3500HD 6.6L Duramax
  1. Dispatch Time: Orders will be shipped within 24 hours after successful payment.
  2. Delivery Time: 2-5 business days after dispatch (delivery speed depends on proximity to warehouse location).
  3. Return Window:7 days for unsatisfactory items45 days for quality-related issues
  4. Refund Processing: Refunds will be processed back to your original payment method within 2-4 business days after receiving the automated refund confirmation email (subject to bank verification).

Product Basics

What is the main feature of this downpipe exhaust?

The standout feature of this downpipe exhaust is its 3.5 - inch diameter. This larger size compared to the factory downpipe allows for significantly improved exhaust flow. With approximately 20% better exhaust flow than the original part, it enhances the engine's ability to expel exhaust gases, which is crucial for optimal performance.

What materials are used in the construction of this downpipe exhaust?

It is crafted from high - quality stainless steel. Stainless steel is chosen for its durability, resistance to corrosion, and ability to withstand high temperatures. This ensures that the downpipe exhaust can handle the harsh conditions under the vehicle, including exposure to heat, moisture, and road debris, for a long time.

What is included in the package when I purchase this downpipe exhaust?

The package typically includes the 3.5 - inch downpipe exhaust itself, a 4 - bolt flange for secure connection, two installed studs to aid in the installation process, and a heat - wrap. The heat - wrap is an important addition as it helps to manage the heat generated by the exhaust, protecting other engine components and improving overall vehicle efficiency.

Compatibility and Fitment

Which specific vehicle models and years is this downpipe exhaust compatible with?

This downpipe exhaust is precisely designed for 2017, 2018, 2019, 2020, 2021, 2022, and 2023 Chevrolet Silverado & GMC Sierra 2500 & 3500HD trucks equipped with the 6.6L Duramax L5P engine. It is crucial to note that it will not fit Cab & Chassis trucks, so make sure to verify your vehicle's specifications before purchasing.

Can I install this downpipe exhaust on a non - Duramax engine or a different make of truck?

No, this downpipe exhaust is engineered specifically for the 6.6L Duramax L5P engine in the mentioned Chevy and GMC truck models. Using it on a non - Duramax engine or a different make of truck can lead to improper fitment, potential damage to the vehicle's exhaust system, and sub - optimal performance. Each vehicle has unique exhaust requirements, and this product is tailored to meet the needs of the specified models.

Are there any known fitment issues with this downpipe exhaust?

When installed correctly on the compatible vehicle models, there should be no significant fitment issues. However, improper installation, such as not using the correct tools or not following the installation instructions precisely, can lead to leaks or misalignment. It is recommended to have the installation done by a professional if you are not confident in your mechanical skills.

Installation Process

Is professional installation required for this downpipe exhaust?

While it is possible for experienced DIYers with the right tools and mechanical knowledge to install this downpipe exhaust, professional installation is highly recommended. A professional mechanic has the expertise to ensure a proper and leak - free installation. They can also handle any unexpected issues that may arise during the process, such as rusted bolts or difficult - to - access components.

What tools do I need to install this downpipe exhaust?

You will need a basic set of automotive tools, including wrenches, socket wrenches, and a jack with jack stands to safely lift and support the vehicle. Penetrating oil may also be useful if the factory bolts are rusted. Additionally, having a torque wrench can help ensure that the bolts are tightened to the correct specifications, preventing leaks and ensuring a secure fit.

How long does the average installation of this downpipe exhaust take?

The installation time can vary depending on your level of experience and the condition of your vehicle. For a professional mechanic, the installation may take around 2 - 3 hours. If you are attempting a DIY installation, it could take anywhere from 4 - 6 hours or more, especially if you encounter any difficulties or need to take breaks.

Performance Benefits

What performance improvements can I expect after installing this downpipe exhaust?

You can anticipate several performance enhancements. The improved exhaust flow can lead to an increase in horsepower and torque, resulting in better acceleration and overall engine power. This is particularly beneficial when towing heavy loads or during off - road driving. Additionally, the reduced backpressure can improve fuel efficiency, allowing you to get more miles per gallon.

How does the heat - wrap contribute to the performance of the vehicle?

The heat - wrap serves multiple performance - related functions. It helps to insulate the downpipe, reducing the amount of heat radiated into the engine bay. This can prevent overheating of nearby engine components, such as hoses and wires, which can lead to premature failure. Lower engine bay temperatures also improve the overall efficiency of the engine, as it can operate more effectively in a cooler environment.

Will this downpipe exhaust affect the sound of my vehicle's exhaust?

Yes, installing this downpipe exhaust can change the sound of your vehicle's exhaust. The larger diameter and improved flow can result in a deeper, more aggressive exhaust note. Many truck enthusiasts appreciate this enhanced sound as it gives their vehicle a more powerful and sporty appearance.

Emissions and Legal Considerations

Does this downpipe exhaust comply with emissions regulations?

This downpipe exhaust is designed for off - road use only. While it is engineered not to directly affect the emissions systems in a way that would violate basic emissions standards, it is important to note that using it on public roads without proper emissions compliance may be illegal in some areas. Always check your local and state emissions regulations before installing and using this product on public roads.

What custom tuning is required for this downpipe exhaust?

Custom tuning is necessary to optimize the performance of your vehicle with this downpipe exhaust. The improved exhaust flow can affect the engine's air - fuel ratio and other parameters. A professional tuner can adjust these settings to ensure that the engine runs smoothly and efficiently, maximizing the performance benefits of the downpipe exhaust while maintaining proper emissions control (where applicable).