If you’re looking for the best Duramax downpipe reviews, you’ve come to the right place. Duramax downpipes are one of the best ways to improve the performance of your Duramax engine. They are designed to increase airflow and help your engine breathe better.

Top 6 Duramax Downpipe Comparison Chart
# | Image | Title | Rating | Price |
---|---|---|---|---|
1 | ![]() | PPE 117000500 Performance Parts & Miscellaneous Accessory | 4.68 | Buy on Amazon |
2 | ![]() | PPE – Downpipe Support Bracket Kit 116110510 Compatible with 2001-2016 GM Duramax w/PPE Manifold Up-Pipe Kit | 4.96 | Buy on Amazon |
3 | ![]() | 117000500 Performance Parts & Miscellaneous Accessory GMCA424 | 5.0 | Buy on Amazon |
4 | ![]() | Gagsu 117000500 Performance Parts & Miscellaneous Accessory GMCA424 | 4.51 | Buy on Amazon |
5 | ![]() | 117000500 3″ Performance Parts & Miscellaneous Accessory Compatible with Chevy Silverado GMC Sierra 2004.5-2010 LLY, LBZ, and LMM 6.6L Duramax Diesel Engines OE GMCA424 | 4.25 | Buy on Amazon |
6 | ![]() | Pypes Performance Exhaust 01-04 Duramax Turbo Direct | 4.6 | Buy on Amazon |
Factors To Consider When Choosing The Right Duramax Downpipe
There are a few things you should consider before purchasing a Duramax downpipe:
- -The size of the downpipe.
- -The type of material the downpipe is made from.
- -The fitment of the downpipe.
- -The price.
Top Rated Duramax Downpipe Overview
1. PPE 117000500 Performance Parts & Miscellaneous Accessory
This product is easy to use and flexible, it has dimensions of 57.912 H x 13.335 L x 18.161 W, and weighs 3.266 kilograms. It is from South Korea.

Things We Like:
- -Easy and flexible to use
- -Package Dimensions: 57.912 H x 13.335 L x 18.161 W (centimetres)
- -Package Weight: 3.266 kilograms
- -Country of Origin: South Korea
2. PPE – Downpipe Support Bracket Kit 116110510
This product is easy to use and comes with a weight that is manageable. It is also from South Korea, making it a great product to purchase.

Things We Like:
- -Easy and flexible to use
- -Package Dimensions: 57.912 H x 13.335 L x 18.161 W (centimetres)
- -Package Weight: 3.266 kilograms
- -Country of Origin: South Korea
3. 117000500 Performance Parts & Miscellaneous Accessory GMCA424
Haufim is a well-known supplier of car parts and accessories, with a focus on diesel-powered vehicles. Their stainless steel air intake system is made from quality materials and meets the OEM standard, making it a perfect fit for your car.
Additionally, the thermal insulation coating ensures good heat resistance and high temperature resistance, making the system reliable and durable. Finally, the 5-year warranty ensures that you have peace of mind when purchasing this product.

Things We Like:
- -Works with 2004.5-2010 GMC / Chevy Duramax Diesel 6.6L Trucks
- -Easy to install
- -High-quality material
- -Warranty and Service
4. Gagsu 117000500 Performance Parts & Miscellaneous Accessory
Our 3″ Stainless Steel Construction Thermal Coated & Heat Wrapped GMCA424 is a direct replacement for your Chevy Silverado GMC Sierra Duramax Diesel LLY LBZ LMM 2004.5-2010. This product has been quality tested before leaving the factory and can be perfectly matched with the original car.

Things We Like:
- -High quality materials
- -Compatible with GMC Sierra Duramax Diesel
- -Direct replacement
- -Lifetime warranty
5. 117000500 3″ Performance Parts & Miscellaneous Accessory
This part is designed to replace the OEM part and is compatible with 2004.5-2010 GMC / Chevy Duramax Diesel 6.6L Trucks and LLY, LBZ, LMM 6.6L 15468.
It is made of high quality 3″ stainless steel construction, is thermal coated and heat wrapped for resistance to oxidation and high strength. It also has a high temperature resistant.

Things We Like:
- -High quality construction
- -Can be installed directly
- -Meets or exceeds OEM standards
- -Price concessions and guaranteed
6. Pypes Performance Exhaust 01-04 Duramax Turbo Direct
Turbo direct pipe is a durable and long lasting pipe that is flanged on one end and round on the other. It is perfect for high-pressure systems and is a great choice for turbocharging.

Things We Like:
- – Durable and long lasting
- – Flanged one end for easy connection
- – Round one end for even flow
How to Use a Duramax Downpipe
A duramax downpipe is a performance exhaust component designed to improve airflow and increase power in your vehicle. It is a simple bolt-on upgrade that anyone can do with basic hand tools. Here are the steps to install a duramax downpipe:
1. Park your vehicle on a level surface and open the hood.
2. Disconnect the negative battery terminal to prevent electrical shorts.
3. Locate the factory downpipe and exhaust manifold.
4. Using a ratchet and socket, remove the bolts that secure the downpipe to the exhaust manifold.
5. Carefully lower the downpipe and remove it from the vehicle.
6. Inspect the mounting flanges and gaskets for damage.
7. Position the new downpipe into place and reinstall the bolts.
8. Reconnect the negative battery terminal.
9. Start the vehicle and check for leaks.
Frequently Asked Questions
What Are Some Things To Remember When Using A Duramax Downpipe?
When using a duramax downpipe, it is important to remember to use a gasket and to make sure the downpipe is securely installed. Additionally, it is important to ensure that the downpipe is properly vented to avoid overpressure and heat buildup.
Why Choose This Type Of Duramax Downpipe?
There are many reasons why an individual might choose a downpipe for their Duramax engine. For one, a downpipe can provide increased performance and torque by reducing air restriction in the engine.
Additionally, downpipes can also improve fuel economy by reducing the amount of air that is forced into the engine.
How To Clean A Duramax Downpipe?
There are a few ways to clean a duramax downpipe. One way is to use a engine cleaner and hose. Another way is to use a shop vac and hose.
Where To Buy The Duramax Downpipe Online?
There are many places online where you can purchase a duramax downpipe. Some popular websites include Amazon and eBay.
How Does Duramax Downpipe Work?
The Duramax downpipe works by modifying the air/fuel mixture prior to it entering the engine. This increase in air/fuel mixture results in more power and torque.
Final Verdict
There are a number of downpipe options available for Duramax engines. Some are better than others, but the best one depends on your specific needs.
If you’re looking to improve your fuel economy, a performance downpipe may be the best option for you. If you’re looking to improve your performance, a performance exhaust system may be a better option.